St. Mary's County reported chlamydia cases run about 49% lower than the U.S. average. Whether it's your first STI test or a routine screening in California, Maryland, you have options that balance convenience and timing. Some clinics take walk-ins for same-day testing, while labs and at-home kits allow you to plan around your own schedule.
Available testing centers
9 testing options are listed for California, MD. The nearest, Greater Baden Medical Services Dental at Lexington Park, is about 2.7 miles away. Compare community and public clinics, private labs, and at-home kits below.
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.
A community safety-net federally qualified health center about 3 miles from California. Sliding-scale STD testing and care are typical here, call ahead to confirm the exact panel and pricing.
Tests offered
Fees & payment
Greater Baden Medical Services in Lexington Park runs on a sliding-scale fee open to everyone, accepts Medicaid and private insurance, and requires an appointment for testing that covers gonorrhea, chlamydia, syphilis, HIV, herpes, hepatitis A, B, and C, and TB. With same-visit treatment for bacterial infections.
Clinics that serve non-English speakers often patch the gap with a phone line rather than a person in the room. Greater Baden Medical Services keeps Spanish-speaking staff on site and arranges interpretation across other languages, so the clinical conversation (symptoms, history, treatment instructions) happens without an intermediary device between patient and provider.
For anyone without a regular primary-care provider (paying on a sliding scale, navigating care without continuity) Greater Baden Medical Services carries herpes and hepatitis A, B, and C testing alongside the standard gonorrhea, chlamydia, syphilis, and HIV panel, so a single appointment covers exposures that a bare-minimum panel would leave unexamined.
Languages
English, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Sep 2025 · Source: CDC NPIN + HRSA
NP Family Practice in Leonardtown handles gonorrhea, chlamydia, syphilis, herpes, and the full hepatitis panel with same-visit treatment for bacterial infections confirmed on-site. Fees run on a sliding scale and insurance or Medicaid is accepted; appointments are required.
PrEP at NP Family Practice means an ongoing clinical relationship: the prescribing provider orders the required baseline labs, writes the prescription, and schedules the follow-up monitoring that the regimen demands. PEP is also available, managed through the same practice rather than handed off elsewhere.
Plenty of STI-focused sites test for gonorrhea, chlamydia, syphilis, and HIV and stop there: herpes serology and hepatitis A, B, and C screening fall outside what they offer. NP Family Practice runs all of those, so a single appointment covers infections that would otherwise require a separate referral.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Dec 2025 · Source: CDC NPIN
Maryland Department of Health in Leonardtown covers herpes, HIV, hepatitis B and C, TB, gonorrhea, chlamydia, and syphilis testing, with same-visit treatment for bacterial STIs and TB. All provided at no charge to every patient, regardless of ability to pay, on a sliding scale.
The clinic runs on a fee structure that sets the cost for every service (testing, treatment, vaccines, partner notification, needle exchange) at nothing. Sliding-scale eligibility is open to all, so the zero-dollar figure isn't conditional on income documentation or insurance status.
Maryland Department of Health in Leonardtown provides care directly in American Sign Language, Spanish, and through interpretation services for other languages, which means clinical conversations (exposure history, treatment instructions, prevention counseling) happen without a communication gap that could distort what a patient walks away understanding.
When a hepatitis C antibody test comes back reactive, treatment begins at the same clinic: prescribing, monitoring, and follow-up are all managed in Leonardtown. That continuity keeps patients in a care relationship with providers who already hold their full testing history.
Languages
American Sign Language, Interpretation Services Available for Non-English Languages, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN
Calvert County Health Department in Prince Frederick operates on a sliding scale and accepts Medicaid, Medicare, and private insurance, with HIV testing offered free. Appointments are required for testing across gonorrhea, chlamydia, syphilis, herpes, hepatitis B, hepatitis C, and TB, with same-visit treatment for bacterial STIs.
Beyond sliding-scale pricing, Calvert County Health Department absorbs the full cost of every service it provides: testing, treatment, counseling, PrEP management, and partner notification all carry no charge. The funding infrastructure, not a per-visit calculation, is what makes the zero-dollar figure consistent across the board.
Spanish-language services at Calvert County Health Department are built into clinical staffing, so HIV test counseling, medication adherence education, and STI treatment conversations happen directly in Spanish. No relay layer between the patient and the clinician delivering care.
As a Title X-funded site, Calvert County Health Department provides family planning services to minors under a legally confidential framework. Meaning the clinical record and any family planning discussion are protected by federal statute, not just clinic policy.
Languages
English, Spanish
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Apr 2026 · Source: CDC NPIN + HRSA
Free tool · not a clinic
Testing too soon can miss an infection. Enter the date of possible exposure to see the earliest a test can reliably detect each 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.
Typical out-of-pocket ranges by option, actual cost depends on which tests you need.
Public / community clinic
Free HIV testing is common
Private lab (self-pay)
Never billed to insurance
At-home kit
Mailed to your door, private
Doctor / urgent care
Often $0 preventive with insurance
No centers match those filters. Clear the service-type filter or the opening-hours filters to see every center.
Every other option
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
The nearest testing center is about 3 miles away; if you'd rather skip the trip, an at-home kit ships to California, 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.
In-home collection
$79 & up
Best for simplicity & support
$89 & up
Best range: couples & full panels
$79 & up
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
Beyond the public testing sites above, these federally certified (CLIA) labs serve St. Mary's 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.
23415 Three Notch Road Suite 2050, California, MD 20619
CMS-certified lab
22878 Three Notch Road, California, MD 20619
CMS-certified lab
22738 Maple Rd #214, Lexington Park, MD 20653
CMS-certified lab
45870 East Run Boulevard, Lexington Park, MD 20653
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near California. 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
Beyond dedicated clinics, 154 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of California. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 83 offer telehealth.
Nofisat Almaroof, MD
Family medicine · 45870 East Run Drive, Lexington Park
Scaria Mathew, MD Telehealth
Family medicine · 22590 Shady Court, California
Katherine Martin, DO
Family medicine · 23127 Three Notch Road, California
Michelle Folsom Elder, MD Telehealth
Family medicine · 14090 Hg Trueman Road, Solomons
Thiri Demars, MD
Family medicine · 14090 Hg Trueman Road, Solomons
Paul Kline, MD Telehealth
Family medicine · 14090 Hg Trueman Road, Solomons
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
No pharmacy near California, MD 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.
0.4 mi 
1.0 mi Giant Pharmacy 359
1.1 miHarris Teeter
1.6 miShowing the 4 closest pharmacies to California, MD.
Directory records identify nearby pharmacies. Service, stock, price, and hours information is shown only when supported by current location-specific evidence.
Prevention & treatment
Testing is one step. For residents of California, 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.
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
$0 with most insurance
Free online PrEP & DoxyPEP: HIV prevention, home lab kits, no in-person visit
Visit from $39
Online STI treatment & DoxyPEP: same-day prescriptions to your pharmacy
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
How reported STI rates in St. Mary's County, the county that includes California, compare with Maryland and U.S. averages, based on the most recent 2023 surveillance data. An estimated ~31% of residents are aged 15–34 (ACS), the age group with the highest reported chlamydia and gonorrhea rates nationally.
#20 of 24 Maryland counties for chlamydia, a higher rate than 17% of the state
| Infection | St. Mary's County | Maryland | United States |
|---|---|---|---|
| Chlamydia | 253.3 292 cases ▼ 56% | 579.8 | 492.2 |
| Gonorrhea | 80.7 93 cases ▼ 61% | 207.1 | 179.5 |
| Syphilis (P&S) | 0.9 1 cases ▼ 94% | 14.2 | 15.8 |
| Syphilis (early) | 2.6 3 cases ▼ 82% | 14.6 | 16 |
| Syphilis (late/unknown) | 3.5 4 cases ▼ 86% | 24.3 | 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.
Between 2020 and 2023 in St. Mary's County, chlamydia has fallen from 362.1 to 253.3 per 100,000 (30%), gonorrhea has fallen from 233.8 to 80.7 per 100,000 (65%), and P&S syphilis has fallen from 5.3 to 0.9 per 100,000 (83%).
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
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 St. Mary's County.
Local HIV snapshot
St. Mary's County HIV care continuum (2021)
St. Mary's County recorded 6.3 new HIV diagnoses per 100,000 (2021), against 13.9 statewide and 13.7 nationally. Among St. Mary's County residents living with HIV, 82.2% are in care · 75.7% 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.
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 St. Mary's County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
MD 235 runs through California long enough that a round-trip clinic visit can eat up a good chunk of a weekday morning, which matters in a town where most adults are in the workforce and schedules leave little slack. Most households here own their homes, but a rent level pushing well past fifteen hundred dollars a month means the roughly four-in-ten who do rent are balancing real cost pressure against every discretionary errand, including health appointments that feel easy to defer. That cost and time reality lands hardest on young adults in their late teens and twenties, a share of the population large enough here to shape the county's STI picture considerably. St.
Mary's County carries STI rates worth paying attention to, and for people still forming relationships and households, the path of least resistance to testing matters more than it might for someone with a flexible schedule and no commute pressure. California's household profile adds its own texture: average households run larger than the national norm, nearly half of adults are married, and a solid share of families clear six figures. Screening fits most naturally into life when it slots alongside existing routines rather than requiring a separate trip planned days in advance.
Getting there
At 6.49/20 on the EPA walkability index, day-to-day errands in California 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 20653 snapshot
ZIP-level Census figures for the wider 20653 area around California: a single ZIP can span several communities, so they describe the area, not California alone.
California sits in St. Mary's County, ZIP 20653. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside California? These nearby communities have their own testing guides: clinics, at-home kits, and free screening close to home.
Reference
Everything to know before you test in St. Mary's County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under Maryland law. If you have symptoms right now, our confidential symptom checker maps them to the tests worth considering.
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 |
Testing too early can return a false negative, confirm timing with a California-area provider.
| Infection | Earliest reliable test | Sample |
|---|---|---|
| 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 |
These are the federal Medicare reference prices for processing each lab test. Public clinics and the community health centers serving California 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.
Two things that actually depend on Maryland 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).
In Maryland, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
Maryland 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 MarylandSource: Guttmacher Institute, Minors' Access to STI Services; CDC, Legal Status of Expedited Partner Therapy. General information, not legal advice.
Good to Know
Answers to the questions people ask most before getting tested.
Yes, several local labs offer same-day walk-in testing; best to call first.
Yes, Medicaid typically covers it, and public clinics are free either way.
Maryland Department of Health, about 7.7 mi away, provides free testing.
A full panel typically covers chlamydia, gonorrhea, syphilis, HIV, and hepatitis B and C.
St. Mary's County reported ~253 chlamydia cases per 100,000 in 2023, below the Maryland average.
At-home kits mail to 20653: self-collect, send to the lab, results in ~2–5 days.
In Maryland, people under 18 can consent to confidential STD testing and treatment on their own.
Yes, PrEP, a daily pill that helps prevent HIV in HIV-negative people, is available in the area.
Get treated, notify partners, pause sex until cleared, and follow up, the infection is manageable.
Often, yes, especially throat and rectal infections, which is why site-specific testing matters.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.