STD Testing in Greenfield, CA: Free, Same-Day & Confidential
New HIV diagnoses in Monterey County are approximately 38% lower than the US average. In Greenfield, California, whether it is your first STI test or a routine screening, you have options. Community and public clinics are often low-cost or free, while private labs tend to offer faster results and more flexible scheduling. Find local clinics and private labs on our list below.
9 testing options are listed for Greenfield, CA. The nearest, Southern Monterey County Memorial Hospital, is about 0.2 miles away. Compare community and public clinics, private labs, and at-home kits below.
How to read these listings
Listings tagged Community health center are federally funded health centers and rural clinics that treat everyone regardless of insurance or ability to pay: required to bill on a sliding fee scale and provide confidential care, and in many states minors may consent to their own STI testing. A Title X tag flags centers funded for confidential family-planning services; confirm current participation when you call.
Source: CMS FQHC & Rural Health Clinic enrollment files (data.cms.gov), refreshed quarterly. Title X status reflects the latest OPA grantee list.
Premium Partner
Labcorp
Most popular Results in 1–2 days
3.9(9)?
Review sources
Google8
EasySTD1
Rated 3.9 out of 5 from 9 reviews
Address
133 4th Street, Gonzales, CA 93926 16.9 miles away
Today's offer: $10 off any test panel, applied automatically at checkout.
Community health center 0.2 miles
Southern Monterey County Memorial Hospital
4.3(105)?
Review sources
Google100
EasySTD5
Rated 4.3 out of 5 from 105 reviews
A community safety-net rural health clinic in Greenfield. Sliding-scale STD testing and care are typical here, call ahead to confirm the exact panel and pricing.
Clinica de Salud del Valle de Salinas in Greenfield tests for HIV, syphilis, gonorrhea, chlamydia, herpes, and hepatitis C on a sliding-scale fee open to all, with appointments required; bacterial infections are treated same visit, and care is conducted fully in Spanish.
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Spanish Is the Clinical Language Here
Every clinical interaction at Clinica de Salud del Valle de Salinas (intake, counseling, results) is conducted in Spanish. That means nuanced questions about symptoms, exposure patterns, and treatment options get answered in full, not condensed into what a brief translation allows.
Herpes and Hepatitis C on the Same Order
When a provider orders testing here, the panel includes herpes and hepatitis C alongside the standard four. The requisition goes out as a single order, not a patchwork of referrals. Hepatitis C, when identified, is managed on-site rather than handed off to a separate care system.
A community safety-net rural health clinic about 9 miles from Greenfield. Sliding-scale STD testing and care are typical here, call ahead to confirm the exact panel and pricing.
Salinas Valley Health in Gonzales integrates STI testing and treatment into a full-service health system, covering gonorrhea, chlamydia, syphilis, HIV, herpes, hepatitis B and C, and TB on a sliding-scale fee, appointments required, with care available in Spanish.
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Herpes and Hepatitis Tested, Not Assumed Elsewhere
Many testing sites cap their panel at gonorrhea, chlamydia, syphilis, and HIV and leave patients to track down herpes and hepatitis testing separately. Salinas Valley Health tests for herpes, hepatitis B, and hepatitis C alongside the core four, so a single visit produces a genuinely complete picture.
PrEP Is Prescribable Here, Not a Referral Destination
Salinas Valley Health prescribes both PrEP and PEP on-site, which means prevention isn't a separate errand at a separate practice. A patient who wants to start either medication can have that conversation and get a prescription at the same clinic handling their testing.
Clinical Spanish, Not a Workaround Service
Spanish-language care at many clinics means something patched together at the front desk. At Salinas Valley Health in Gonzales, Spanish is a direct channel for clinical conversations (symptoms, medication instructions, prevention options) without anything lost in relay.
CSVS - Gonzales Clinic in Gonzales carries full federal FQHC standing, which means fees slide with your income. No one is turned away for inability to pay. Walk-in STI screening covers syphilis, gonorrhea, and chlamydia without an appointment required.
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.
The nearest testing center is less than a mile away, if you'd rather skip the trip, an at-home kit ships to Greenfield, 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 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.
In-home collection
Quest Diagnostics
$79 & up
Panel:
8-infection panel incl. chlamydia, gonorrhea, HIV, syphilis, hepatitis & herpes: single tests too
Sample:
Quest Mobile: a phlebotomist collects your sample at home
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 Greenfield, CA
Beyond the public testing sites above, these federally certified (CLIA) labs serve Monterey 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.
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Greenfield. 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 Greenfield, CA who may help arrange STD testing
Beyond dedicated clinics, 33 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Greenfield. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 2 offer telehealth.
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 Greenfield, CA
Compare the pharmacies closest to Greenfield, CA. Contact a location directly to confirm pharmacy-counter hours, services, prices, and product availability before visiting.
Showing the 4 closest pharmacies to Greenfield, CA.
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 Greenfield, 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.
PrEP & DoxyPEP
Q Care Plus
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
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 Monterey County: the local picture
How reported STI rates in Monterey County, the county that includes Greenfield, compare with California and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~30% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#12
#12 of 58 California counties for chlamydia, a higher rate than 79% of the state
Reported STD rates per 100,000, Monterey County vs California vs U.S.
Monterey CountyCaliforniaU.S.▲▼ = Monterey County vs the state average
Infection
Monterey County
California
United States
Chlamydia
4982,145 cases▲ 1%
491.1
492.2
Gonorrhea
70.3303 cases▼ 63%
190.2
179.5
Syphilis (P&S)
13.558 cases▼ 17%
16.3
15.8
Syphilis (early)
12.353 cases▼ 36%
19.1
16
Syphilis (late/unknown)
32.5140 cases▼ 30%
46.7
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 Monterey County over time (per 100,000)
Chlamydia ▼ 3% vs 2022
Chlamydia Gonorrhea Syphilis (P&S)
Between 2020 and 2023 in Monterey County, chlamydia has risen from 439.1 to 498 per 100,000 (13%), gonorrhea has fallen from 101.6 to 70.3 per 100,000 (31%), and P&S syphilis has risen from 6.4 to 13.5 per 100,000 (111%).
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 Greenfield, CA
Adults uninsured
27.7%
No routine checkup
33.9%
No transportation
18.1%
Binge drinking
17%
Frequent mental distress
19.7%
Depression
19.9%
Below poverty line
12.9%
Primary-care ratio
1,545 : 1
Monterey County
Primary-care shortage score 20 / 26
Medically Underserved Area · IMU 59.8
Social Vulnerability Index · 87th 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 Monterey County.
Local HIV snapshot
HIV in Monterey County (2023)
People living with HIV
221 / 100k
New diagnoses (2023)
30cases countywide
On PrEP (coverage)
35.4%
Monterey County HIV care continuum (2023)
Monterey County recorded 8.5 new HIV diagnoses per 100,000 (2023), against 14.9 statewide and 13.7 nationally. Among Monterey County residents living with HIV, 74.1% are in care · 68.3% 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 Monterey County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
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 →
Along El Camino Real, where Greenfield stretches between Jim Maggini Memorial Park and the open farmland edging town, a slim majority of households rent rather than own, and typical monthly rent sits close enough to the median that covering it leaves little cushion for medical visits that feel optional. With nearly half of all households averaging close to five people under one roof, health decisions here ripple outward fast: one person's positive result means partners and housemates need to know, and the window for acting on that is narrow. Younger adults navigating new relationships, people in their late teens and twenties who are still sorting out coverage and costs, face a specific calculation: a test that costs nothing out of pocket and fits a weekday errand is one that actually gets scheduled. The share of households clearing six figures is relatively modest, so even a modest copay can tip the decision.
Monterey County's STI rates give context for why that range matters. Oak Park and the blocks radiating from it are home to many of the younger adults and multigenerational families most likely to benefit from routine screening. Because Greenfield sits along US 101, a drive to the nearest listed clinic is measured in highway miles, and for households sharing a single car among five people, knowing exactly how far that drive runs, and whether the hours clear a work shift, is the detail that changes whether screening happens before another month slips by.
Getting there
How residents reach STD testing in Greenfield, CA
Walkability9.71 / 20 · Below average
At 9.71/20 on the EPA walkability index, day-to-day errands in Greenfield 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.
ZIP 93927 snapshot
Residents
21,131
Median age
27.9
Median income
$77,272
ZIP-level Census figures for the wider 93927 area around Greenfield: a single ZIP can span several communities, so they describe the area, not Greenfield alone.
Greenfield sits in Monterey County, ZIP 93927. Local context that shapes where residents test:
Local landmarks
Oak Park
Hicks Park
Park Greenfield
Jim Maggini Memorial Park
Greenfield Memorial Hall
Patriot Park
Major routes
US 101 (El Camino Real)
Nearby cities & towns
STD testing near Greenfield, CA
Just outside Greenfield? These nearby communities have their own testing guides: clinics, at-home kits, and free screening close to home.
STD testing in Greenfield, CA: screening, costs & privacy
Everything to know before you test in Monterey County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under California law. If you have symptoms right now, our confidential symptom checker maps them to the tests worth considering.
Who should test, and whenCDC screening schedule + each infection's detection window
Who should get tested, and how often
Based on current CDC screening recommendations.
Group
Tests
How 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 Greenfield-area provider.
What each STD test costsMedicare 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 Greenfield 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.
Test
Reference price
CPT / 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 CaliforniaMinor consent and partner treatment (EPT) under state law, plus how to test privately
Two things that actually depend on California 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 California, a minor aged 12 or older can consent to confidential STI testing and treatment on their own, no parental permission is required.
Can my partner be treated too? (EPT)
California 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.
