Merrimack County has new HIV diagnoses 73% lower than the US average. If you've had a recent risk or simply test on a regular schedule, you'll find various options in Northfield, New Hampshire. Some clinics offer same-day testing when you're ready to go, but labs and at-home kits let you plan around your own time.
Available testing centers
9 testing options are listed for Northfield, NH. The nearest, HealthFirst Family Care Center, is about 3.7 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.
HealthFirst Family Care Center in Franklin pairs gonorrhea, chlamydia, syphilis, and rapid HIV testing with same-visit treatment for bacterial infections, so a single appointment can close the loop. Fees run on a sliding scale, with Medicaid, Medicare, and private insurance all accepted.
Languages
English
Tests offered
Care services
Prevention services
Fees & payment
Listing verified Oct 2025 · Source: CDC NPIN
HealthFirst at Archways, in Franklin, structures its fees on a sliding scale tied to income. No one is turned away for inability to pay. Walk-ins are welcome for STI screening that covers syphilis, gonorrhea, and chlamydia, with costs adjusted to what each patient can afford.
Tests offered
Fees & payment
Convenient MD Urgent Care in Belmont runs walk-in STI testing, no appointment needed, covering syphilis, chlamydia, and gonorrhea, with bacterial treatment and mpox vaccination available the same visit, all on a sliding-scale fee through insurance or at no cost.
Languages
English
Tests offered
Care services
Fees & payment
Listing verified Dec 2025 · Source: CDC NPIN
Community Action Program Belknap-Merrimack Counties in Laconia requires an appointment, so scheduling ahead means arriving to a visit that covers rapid HIV, syphilis, gonorrhea, chlamydia, and hepatitis A, B, and C testing, plus STI treatment and vaccines, on a sliding-scale fee.
Languages
English
Tests offered
Serves
Care services
Prevention services
Fees & payment
Listing verified Nov 2025 · Source: CDC NPIN
HealthFirst at Isaiah 61 Cafe, in Laconia, welcomes walk-ins for STI screening without an appointment. Federal qualification backs its sliding-scale fees, so cost adjusts to income. A single visit can cover syphilis, gonorrhea, and chlamydia testing, making same-day screening straightforward for anyone who walks through the door.
Tests offered
Fees & payment
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 4 miles away; if you'd rather skip the trip, an at-home kit ships to Northfield, 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 value: single tests
$49 & 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 Merrimack 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.
250 Pleasant, Concord, NH 03301
CMS-certified lab Accredited · College of American Pathologists
15 Aiken Avenue, Franklin, NH 03235
CMS-certified lab
248 Pleasant Street, Suite 2800, Concord, NH 03301
CMS-certified lab
Source: CMS CLIA registry (Provider of Services), Q1 2026. Federal public records: active CLIA-certified laboratories near Northfield. 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, 223 primary-care, OB-GYN, infectious-disease and other clinicians have a CMS practice record within 30 miles of Northfield. They may be able to evaluate symptoms or order a confidential STD panel during a regular visit, and 91 offer telehealth.
Peter Doane, MD
Family medicine · 139 Winter Street, Tilton
Nicholas Croce, DO
Family medicine · 841 Central Street, Franklin
Najia Dar
Internal medicine · 841 Central Street, Franklin
Melissa Hanrahan, MD
Family medicine · 15 Aiken Avenue, Franklin
Sarah Glover, DO
Internal medicine · 325 Daniel Webster Highway, Boscawen
Mark Aronson, DO
Family medicine · 96 Daniel Webster Highway, Belmont
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 Northfield, NH 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.
2.9 mi 
3.2 mi Shaws Supermarkets
3.2 mi
3.4 mi Hannaford Food and Drug
3.5 miShowing the 5 closest pharmacies to Northfield, NH.
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 Northfield, 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.
Visit from $0 insured
Telehealth STI treatment and sexual-health care, delivered or to your pharmacy
From $0 insured
Telehealth PrEP & DoxyPEP with at-home testing and ongoing monitoring
$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 Merrimack County, the county that includes Northfield, compare with New Hampshire and U.S. averages, based on the most recent 2023 surveillance data.
#3 of 10 New Hampshire counties for chlamydia, among the very highest in the state
| Infection | Merrimack County | New Hampshire | United States |
|---|---|---|---|
| Chlamydia | 180.1 283 cases ▼ 8% | 196.6 | 492.2 |
| Gonorrhea | 33.1 52 cases ▼ 21% | 41.9 | 179.5 |
| Syphilis (P&S) | 5.7 9 cases ▲ 46% | 3.9 | 15.8 |
| Syphilis (early) | 2.5 4 cases ▲ 32% | 1.9 | 16 |
| Syphilis (late/unknown) | 3.8 6 cases ▼ 5% | 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.
Between 2020 and 2023 in Merrimack County, chlamydia has fallen from 193.1 to 180.1 per 100,000 (7%), gonorrhea has risen from 22.8 to 33.1 per 100,000 (45%), and P&S syphilis has risen from 1.3 to 5.7 per 100,000 (338%).
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 Merrimack County.
Local HIV snapshot
Merrimack County HIV care continuum (2021)
Merrimack County recorded 3.7 new HIV diagnoses per 100,000 (2021), against 2.8 statewide and 13.7 nationally. Among Merrimack County residents living with HIV, 76.5% are in care · 60.6% 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 Merrimack County tests for syphilis.
Source: CDC NCHHSTP AtlasPlus, 2023 (county-level congenital syphilis is not published).
Local resources & officials
Data & references
Local context
Northfield, in Merrimack County, New Hampshire, is a small-town community, where unemployment runs about 4.2%, and only about 20.4% of adults have finished college. Workforce participation is high. A nearby clinic plus at-home kits and telehealth make testing easy to arrange.
Getting there
At 6.69/20 on the EPA walkability index, day-to-day errands in Northfield 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.
Northfield sits in Merrimack County, ZIP 3276. Local context that shapes where residents test:
Local landmarks
Neighborhoods & communities
Major routes
Nearby cities & towns
Just outside Northfield? 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 Merrimack County: the CDC's screening guidelines, each infection's detection window, per-test reference prices, and your privacy rights under New Hampshire 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 Northfield-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 Northfield 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 New Hampshire 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 New Hampshire, a minor of any age can consent to confidential STI testing and treatment on their own, no parental permission is required.
New Hampshire 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 New HampshireSource: 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.
Public clinics serve people without insurance, often on a sliding scale.
A full panel typically covers chlamydia, gonorrhea, syphilis, HIV, and hepatitis B and C.
Merrimack County reported ~180 chlamydia cases per 100,000 in 2023, below the New Hampshire average.
In New Hampshire, people under 18 can consent to confidential STD testing and treatment on their own.
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.
Reassuring if you tested after the window, just retest if it was early, and screen again with new partners.
A urine test or swab finds trichomoniasis, one of the most treatable STIs.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.