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STD Testing in Larkspur, CO: Free, Same-Day & Confidential

In Colorado, reported gonorrhea in Douglas County runs about 78% lower than the US average. If you're wondering about your STI testing options in Larkspur, whether you need testing after a possible exposure or as part of routine care, clinics may bill or offer sliding-scale fees, while many private labs let you pay a flat self-pay price. Look below to explore your options.

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  • Clinics, labs & at-home kits compared
  • Free & low-cost options included
  • Backed by CDC, CMS & Census data
  • Editorially reviewed

Available testing centers

STD testing near Larkspur, CO

5 testing options are listed for Larkspur, CO. The nearest, Quest Diagnostics, is about 9.1 miles away. Compare community and public clinics, private labs, and at-home kits below.

Most reviewed 12.2 miles

Founders Family Medicine and Urgent Care

Where these reviews come from

Review sources

  • Google1,002
  • EasySTD5
Rated 4.4 out of 5 from 1007 reviews

Founders Family Medicine and Urgent Care in Castle Rock tests for gonorrhea, chlamydia, HIV, and hepatitis A, B, and C, treating any bacterial STI the same visit: with sliding-scale fees that apply to everyone, and all services available at no fee.

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No Fee for Every Service Offered Here

For anyone paying out of pocket (no insurance, no regular provider, no employer coverage) Founders Family Medicine and Urgent Care covers the full cost of every service it offers. Testing, vaccination, and treatment are each available at no charge, with sliding-scale fees as the floor and zero as the ceiling.

Hepatitis Testing Sits Beside the Standard Panel

Clinics running a standard STI panel typically stop at HIV, gonorrhea, chlamydia, and syphilis. Leaving hepatitis for a separate appointment elsewhere. Founders tests for hepatitis A, B, and C alongside conventional HIV testing, so a single visit covers infections that share transmission routes but rarely share a testing room.

Tests & treats
Address
4386 Trail Boss Drive, Castle Rock, CO 80104
Booking
Appointment required
Opening hours
  • Monday 8:00 AM – 8:00 PM
  • Tuesday 8:00 AM – 8:00 PM
  • Wednesday 8:00 AM – 8:00 PM
  • Thursday 8:00 AM – 8:00 PM
  • Friday 8:00 AM – 8:00 PM
  • Saturday 8:00 AM – 4:00 PM
  • Sunday 8:00 AM – 3:00 PM
Website
Premium Partner

Quest Diagnostics

Closest to you Results in 1–2 days
Where these reviews come from

Review sources

  • Google63
  • EasySTD5
Rated 3.8 out of 5 from 68 reviews
Address
880 South Perry Street, Castle Rock, CO 80104 9.1 miles away
Opening hours
  • Monday 7:00 AM – 4:00 PM
  • Tuesday 7:00 AM – 4:00 PM
  • Wednesday 7:00 AM – 4:00 PM
  • Thursday 7:00 AM – 4:00 PM
  • Friday 7:00 AM – 4:00 PM
  • Saturday Closed
  • Sunday Closed
  • Chlamydia
  • Gonorrhea
  • Syphilis
  • Herpes
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • Rapid HIV
  • Conventional HIV
See tests & prices

Today's offer: $10 off any test panel, applied automatically at checkout.

Premium Partner

Labcorp

Results in 1–2 days
Where these reviews come from

Review sources

  • Google67
  • EasySTD5
Rated 2.9 out of 5 from 72 reviews
Address
2352 Meadows Boulevard, Castle Rock, CO 80109 11.7 miles away
Opening hours
  • Monday 7:00 AM – 3:00 PM
  • Tuesday 7:00 AM – 3:00 PM
  • Wednesday 7:00 AM – 3:00 PM
  • Thursday 7:00 AM – 3:00 PM
  • Friday 7:00 AM – 3:00 PM
  • Saturday Closed
  • Sunday Closed
  • Chlamydia
  • Gonorrhea
  • Syphilis
  • Herpes
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • Rapid HIV
  • Conventional HIV
See tests & prices

Today's offer: $10 off any test panel, applied automatically at checkout.

Premium Partner

Labcorp at Walgreens

Results in 1–2 days
Where these reviews come from

Review sources

  • Google52
  • EasySTD5
Rated 2.8 out of 5 from 57 reviews
Address
14 East Allen Street, Castle Rock, CO 80108 12.6 miles away
Opening hours
  • Monday 7:00 AM – 3:30 PM
  • Tuesday 7:00 AM – 3:30 PM
  • Wednesday 7:00 AM – 3:30 PM
  • Thursday 7:00 AM – 3:30 PM
  • Friday 7:00 AM – 3:30 PM
  • Saturday Closed
  • Sunday Closed
  • Chlamydia
  • Gonorrhea
  • Syphilis
  • Herpes
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • Rapid HIV
  • Conventional HIV
See tests & prices

Today's offer: $10 off any test panel, applied automatically at checkout.

Premium Partner

Labcorp

Results in 1–2 days
Where these reviews come from

Review sources

  • Google97
  • EasySTD5
Rated 2.9 out of 5 from 102 reviews
Address
10103 Ridgegate Parkway, Lone Tree, CO 80124 20.5 miles away
Opening hours
  • Monday 7:00 AM – 3:00 PM
  • Tuesday 7:00 AM – 3:00 PM
  • Wednesday 7:00 AM – 3:00 PM
  • Thursday 7:00 AM – 3:00 PM
  • Friday 7:00 AM – 3:00 PM
  • Saturday Closed
  • Sunday Closed
  • Chlamydia
  • Gonorrhea
  • Syphilis
  • Herpes
  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • Rapid HIV
  • Conventional HIV
See tests & prices

Today's offer: $10 off any test panel, applied automatically at checkout.

Free tool · not a clinic

When can I test? Exposure-window calculator

Testing too soon can miss an infection. Enter the date of possible exposure to see the earliest a test can reliably detect each STI.

Detection windows for every STI
Infection Earliest reliable test Conclusive after
Chlamydia 7 days after exposure 14 days after exposure
Gonorrhea 7 days after exposure 14 days after exposure
Trichomoniasis 7 days after exposure 28 days after exposure
HIV (NAT / RNA) 10 days after exposure 33 days after exposure
HIV (4th-gen Ag/Ab) 18 days after exposure 45 days after exposure
HIV (antibody) 21 days after exposure 84 days after exposure
Syphilis 21 days after exposure 42 days after exposure
Hepatitis B 21 days after exposure 42 days after exposure
Hepatitis C 56 days after exposure 77 days after exposure
Herpes (HSV) 28 days after exposure 112 days after exposure

Guidance only, confirm timing with a clinician. A negative result before the conclusive date may need a repeat test.

Find your match in 10 seconds

What matters most to you?

What will it cost? Estimate your STD test

Typical out-of-pocket ranges by option, actual cost depends on which tests you need.

  • Public / community clinic

    Free HIV testing is common

    $0–$25

  • Private lab (self-pay)

    Never billed to insurance

    $24–$200

  • At-home kit

    Mailed to your door, private

    From $49

  • Doctor / urgent care

    Often $0 preventive with insurance

    $0–$50 copay

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Every other option

More ways to get tested in Larkspur, CO

Beyond the dedicated testing centers above: at-home kits by mail, hospital labs certified for STI testing, local clinicians who can order a panel during a regular visit, pharmacies for self-test kits and prescriptions, and online PrEP & treatment.

Test from home

At-home STD testing in Larkspur, CO

The nearest testing center is about 9 miles away; if you'd rather skip the trip, an at-home kit ships to Larkspur, you collect the sample privately, and mail it back to a CLIA-certified lab. Results come online in days, with a clinician available if anything is positive. Same labs as a clinic, no waiting room, and you can read how accurate at-home STD tests are before you order.

Want a free option first? The CDC-supported TakeMeHome (opens in a new tab) program mails free at-home HIV self-test kits, and, in many areas, free STI kits, to your door, with no insurance or payment needed. The paid kits below add broader panels and faster turnaround.

Every kit uses CLIA-certified labs. At-home testing is for screening; a reactive result should be confirmed and treated by a clinician. Prices and panels shown are illustrative and change often, confirm current details on the provider's site.

Also in the area

Other CLIA-certified labs near Larkspur, CO

Beyond the public testing sites above, these federally certified (CLIA) labs serve Douglas County, each lab's town is shown on its card below. Many test through a doctor's order or by appointment rather than walk-in, so call ahead to confirm STD/STI testing and availability before visiting.

  • CO Vitality Services

    11960 Lioness Way, Parker, CO 80134

    CMS-certified lab Accredited · COLA

    • STD testing
    Call Directions

  • CU Medicine Interventional Radiology

    9135 South Ridgeline Boulevard, Suite 150, Highlands Ranch, CO 80129

    CMS-certified lab

    • STD testing
    Call Directions

  • Adventhealth ED & Urgent Care Meridian LAB

    9949 South Oswego, Suite 100, Parker, CO 80134

    CMS-certified lab

    • STD testing
    Call Directions

Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Larkspur. A CLIA certificate records only that a laboratory is federally certified — it does not confirm the site performs STD testing, nor its hours, price or access. Inclusion is not an endorsement; always call to verify.

Local clinicians

Clinicians near Larkspur, CO who may help arrange STD testing

Beyond dedicated clinics, 1,200 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Larkspur. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 463 offer telehealth.

  • Belton Hallmark, MD Telehealth

    Family medicine · 1189 South Perry Street, Castle Rock

    Call Directions

  • Sarah Logan, MD

    OB-GYN · 1175 South Perry Street, Castle Rock

    Call Directions

  • Michelle Klismith, MD

    Family medicine · 15909 Jackson Creek Parkway, Monument

    Call Directions

  • Brent Herron, MD

    Family medicine · 1001 South Perry Street, Castle Rock

    Call Directions

  • Michael Oneill, MD Telehealth

    Family medicine · 240 Beacon Lite Road, Monument

    Call Directions

  • Baiju Abdulla, MD Telehealth

    General practice · 1 Oakwood Park Plz, Castle Rock

    Call Directions

These are registry-listed clinicians, not dedicated STD-testing clinics. CMS records do not independently verify current licensure, testing services, availability, price, or new-patient status. Confirm each detail before booking. Source: CMS Doctors & Clinicians.

Nearby pharmacies

Pharmacies near Larkspur, CO

No pharmacy near Larkspur, CO publishes an STD-related service or holds a current CLIA testing certificate, so these are simply the closest. Contact a location directly to confirm counter hours, services, prices, and availability before visiting.

Showing the 2 closest pharmacies to Larkspur, CO.

Directory records identify nearby pharmacies. Service, stock, price, and hours information is shown only when supported by current location-specific evidence.

Prevention & treatment

PrEP, prevention & online treatment

Testing is one step. For residents of Larkspur, telehealth covers the rest: HIV-prevention medication (PrEP) and DoxyPEP to lower future risk, and discreet online treatment if a result comes back positive. All prescribed by licensed U.S. clinicians.

Pricing varies by insurance and changes often, confirm on the provider's site. These services are not a substitute for emergency care.

STD stats & rates

STDs & HIV in Douglas County: the local picture

How reported STI rates in Douglas County, the county that includes Larkspur, compare with Colorado and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~12% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.

#43 of 64 Colorado counties for chlamydia, a higher rate than 33% of the state

Reported STD rates per 100,000, Douglas County vs Colorado vs U.S.

Douglas County Colorado U.S. ▲▼ = Douglas County vs the state average
Infection Douglas County Colorado United States
Chlamydia
186.8 717 cases ▼ 57%
435.1 492.2
Gonorrhea
39.9 153 cases ▼ 69%
128.7 179.5
Syphilis (P&S)
4.2 16 cases ▼ 74%
16 15.8
Syphilis (early)
1.8 7 cases ▼ 83%
10.4 16
Syphilis (late/unknown)
7.8 30 cases ▼ 73%
28.4 29.5

Rates per 100,000 population, 2023. Source: CDC NCHHSTP AtlasPlus (county, state & U.S., all-ages basis). Population figures: U.S. Census Bureau ACS. These figures are the latest available surveillance estimates. Bars are scaled to the highest rate shown.

Reading these numbers: reported case rates only count infections that were actually tested for and diagnosed, so they track local screening effort as much as true spread: a higher rate can reflect more testing, a lower one less. Either way, most STIs cause no symptoms, so treat the figures above as context rather than a verdict, and test on the CDC's schedule regardless of how your area looks.

Reported STD rates in Douglas County over time (per 100,000)

Chlamydia ▲ 0% vs 2022
Chlamydia Gonorrhea Syphilis (P&S)
0 125 250 2020202120222023

Between 2020 and 2023 in Douglas County, chlamydia has fallen from 210.9 to 186.8 per 100,000 (11%), gonorrhea has fallen from 43.6 to 39.9 per 100,000 (8%), and P&S syphilis has risen from 3.9 to 4.2 per 100,000 (8%).

The 2020 dip reflects reduced pandemic-era screening, not lower transmission. Source: CDC NCHHSTP AtlasPlus (county, state & U.S., all-ages basis).

Community health context

What shapes testing access in and around Larkspur, CO

Adults uninsured
4.8%
No routine checkup
20.9%
Binge drinking
16%
Frequent mental distress
12.4%
Depression
20.2%
Below poverty line
2.7%
Primary-care ratio
1,430 : 1
Douglas County
  • Social Vulnerability Index · 2nd percentile nationally

Sources: CDC PLACES (ZIP), County Health Rankings, CDC/ATSDR SVI, HRSA HPSA, HRSA MUA/P, Neighborhood Atlas ADI. Lower insurance coverage, fewer routine checkups, and a thin primary-care ratio all raise the value of low-cost public clinics and at-home testing in Douglas County.

Local HIV snapshot

HIV in Douglas County (2023)

People living with HIV
94 / 100k
New diagnoses (2023)
11cases countywide
On PrEP (coverage)
14.8%

Douglas County HIV care continuum (2023)

Douglas County recorded 3.4 new HIV diagnoses per 100,000 (2023), against 9.6 statewide and 13.7 nationally. Among Douglas County residents living with HIV, 81% are in care · 76.3% are virally suppressed. Early, routine testing is what moves these numbers: it is the entry point to PrEP, treatment, and viral suppression.

Sources: AIDSVu (Emory/Gilead) · CDC AHEAD · CDC AtlasPlus · CDC NCHHSTP AtlasPlus (county care continuum). The CDC recommends everyone aged 13–64 test for HIV at least once: every lab and clinic listed above offers HIV testing, and free rapid HIV testing is available at a local health department.

Pregnant or planning to be?

Congenital syphilis is the fastest-rising STI: what to test, and when

Congenital syphilis, passed from parent to baby in pregnancy, is the fastest-rising STI in the country. U.S. cases climbed from 2,163 in 2020 to 3,882 in 2023. It is almost entirely preventable: the CDC recommends a syphilis test at the first prenatal visit, and every clinic and lab listed for Douglas County tests for syphilis.

Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).

Reviewed & Fact-Checked · Updated

Reviewed by EasySTD Editorial Team (opens in a new tab)

Compiled and checked by EasySTD's editorial team against CDC and public-health sources. This is educational information, not a substitute for advice from a licensed clinician. Our editorial guidelines → (opens in a new tab)

17 Sources

Local resources & officials

Data & references

Local context

About Larkspur, CO

Larkspur Butte rises just east of I-25, grounding a town where most households own their homes and a solid majority of adults are married. The kind of rooted, family-oriented community where health decisions tend to get folded into busy schedules rather than treated as standalone errands. Average households here run close to three people, which means a single adult's testing habit often reflects quietly on everyone under the same roof. That rootedness is real, but it doesn't erase the practical hurdles.

For younger adults in Larkspur (people in their late teens and twenties, the years when STI transmission rates run highest) that drive is the most concrete barrier between knowing their status and not knowing it. Douglas County's STI figures sit within a broader regional pattern that doesn't skip small, owner-occupied communities. For anyone living along Larkspur's quiet roads, staying current on screening means the county rate stays a statistic rather than a personal one.

Getting there

How residents reach STD testing in Larkspur, CO

Walkability 4.34 / 20 · Least walkable

At 4.34/20 on the EPA walkability index, day-to-day errands in Larkspur generally mean driving: plan on a car or rideshare to reach a clinic, and check each listing's hours and phone before you go.

Source: EPA National Walkability Index 2021.

Map of 5 STD & STI testing locations in Larkspur, Colorado, EasySTD

ZIP 80118 snapshot

Residents
5,950
Median age
53.9
Median income
$153,368

ZIP-level Census figures for the wider 80118 area around Larkspur: a single ZIP can span several communities, so they describe the area, not Larkspur alone.

Larkspur sits in Douglas County, ZIP 80118. Local context that shapes where residents test:

Local landmarks

  • Larkspur Butte
  • Colorado Renaissance Festival
  • Children's Realm
  • Larkspur Park
  • Maze
  • Camel and Llama Rides

Major routes

  • I 25 EXPR (South Gap Express Lane)

Reference

STD testing in Larkspur, CO: screening, costs & privacy

Everything to know before you test in Douglas County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Colorado law. If you have symptoms right now, our confidential symptom checker maps them to the tests worth considering.

Who should test, and when

CDC screening schedule + each infection's detection window

Who should get tested, and how often

Based on current CDC screening recommendations.

GroupTestsHow often
Everyone aged 13–64 HIV At least once
Sexually active women under 25 Chlamydia, gonorrhea Every year
Women 25+ with new or multiple partners Chlamydia, gonorrhea Every year
Pregnant people HIV, syphilis, hepatitis B & C, chlamydia Early in pregnancy
Gay & bisexual men (MSM) Chlamydia, gonorrhea, syphilis, HIV Every 3–6 months
Anyone who shares injection equipment HIV, hepatitis B & C At least yearly
All adults at least once Hepatitis C At least once

When to test: STD detection windows

Testing too early can return a false negative, confirm timing with a Larkspur-area provider.

InfectionEarliest reliable testSample
Chlamydia 1–2 weeks Urine or swab
Gonorrhea 1–2 weeks Urine or swab
Trichomoniasis 1–4 weeks Urine or swab
HIV (NAT / RNA) 10–33 days Blood
HIV (4th-gen Ag/Ab) 18–45 days Blood
HIV (antibody) 3–12 weeks Blood / oral
Syphilis 3–6 weeks Blood
Hepatitis B 3–6 weeks Blood
Hepatitis C 8–11 weeks Blood
Herpes (HSV) 4–16 weeks (antibody); swab a sore Blood / swab
Browse all STD & STI guides

What each STD test costs

Medicare reference prices per lab test, a benchmark before you pay out of pocket

These are the federal Medicare reference prices for processing each lab test. Public clinics and the community health centers serving Larkspur often test free or on a sliding scale; private labs and at-home kits bundle several tests into one fee. Use this as a per-test benchmark before you pay out of pocket, or see the full guide to STD test costs for insurance, free, and at-home options.

TestReference priceCPT / HCPCS
Chlamydia (NAAT) $47.80 87491
Gonorrhea (NAAT) $47.80 87591
Trichomoniasis (NAAT) $47.76 87661
HIV-1/2 antigen/antibody $26.87 87389
HIV-1/2 antibody $22.44 86703
Syphilis (RPR/VDRL) $5.61 86592
Syphilis (treponemal antibody) $17.49 86780
Herpes (HSV NAAT) $47.76 87529
Hepatitis B surface antigen $15.33 87340
Hepatitis C antibody $29.16 86803

Source: Medicare Clinical Laboratory Fee Schedule, CMS, 2025 rates (data.cms.gov). Reference rate for the lab assay only: a clinic visit, sample collection, or a bundled multi-test panel may cost more. Medicaid and most insurers cover STD screening at no out-of-pocket cost.

Confidentiality & consent in Colorado

Minor consent and partner treatment (EPT) under state law, plus how to test privately

Two things that actually depend on Colorado law: who can consent, and whether partners can be treated without their own visit. Everything else about testing privately is the same nationwide (see below).

Can a minor consent on their own?

In Colorado, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.

Can my partner be treated too? (EPT)

Colorado permits Expedited Partner Therapy (EPT): if you test positive for chlamydia or gonorrhea, your provider can give you medication (or a prescription) to pass to your partner, no separate exam or appointment needed for them.

Keeping a test private works the same in every state. Whether an STD test shows on insurance (the EOB), how to test anonymously, and self-pay options that leave no insurance trail don’t change by location.

Learn more about confidential STD testing in Colorado

Source: Guttmacher Institute, Minors' Access to STI Services; CDC, Legal Status of Expedited Partner Therapy. General information, not legal advice.

Good to Know

STD testing FAQs for Larkspur, CO

Answers to the questions people ask most before getting tested.

How many testing options are within 30 miles of Larkspur, CO?

5 testing options are within 30 miles of Larkspur, CO.

Does insurance cover STD testing near Larkspur, CO?

Most plans cover STD screening; a clinic or lab can bill insurance, or you can pay a flat self-pay price.

Where's free HIV testing around Larkspur, CO?

Public clinics nearby offer free HIV testing.

Which tests are offered near Larkspur, CO?

Local options test for Chlamydia, Gonorrhea, Syphilis, Herpes, Hepatitis A, Hepatitis B, Hepatitis C, Rapid HIV, a full panel covers the common ones.

How common is chlamydia in Douglas County?

About 187 cases per 100,000 residents (2023), below the Colorado average.

Can someone under 18 get tested in Colorado without a parent?

In Colorado, people under 18 can consent to confidential STD testing and treatment on their own.

Is my health information protected when I test?

Medical records are protected under federal HIPAA law, ask the clinic how it handles your information.

What does a positive STD result mean?

It means an infection was found; a provider confirms it and starts treatment, most STIs are curable or manageable.

Can syphilis be treated?

It's curable with antibiotics; catching it early avoids serious complications.

Should I test again after being treated?

A retest around 3 months after treatment is recommended for chlamydia and gonorrhea.

Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.