Find STD Testing

Home › Iowa › Mason City › MercyOne

MercyOne – MercyOne North Iowa Infectious Disease Care

STD/STI testing location in Mason City, Iowa.

Verify with the clinic before visiting. Hours, services, fees and appointment rules change. Call ahead to confirm. This directory is for information only and is not medical advice. In an emergency, call 911.

Address: 1000 4th St SW, Mason City, IA 50401
Get directions

Phone: (641) 428-8001

Website: https://mercyone.org/location/mercyone-north-iowa-infectious-disease-c

Tests listed

Cost and payment

PrEP for uninsured, Fee, Insurance Accepted.

Hours

Monday8:00am – 5:00pm
Tuesday8:00am – 5:00pm
Wednesday8:00am – 5:00pm
Thursday8:00am – 5:00pm
Friday8:00am – 5:00pm
Saturday8:00am – 5:00pm
Sunday8:00am – 5:00pm

Appointment required: Yes

Other services

STI treatment, PrEP (HIV prevention medicine).

Languages: English

Type: Clinic

Source: CDC NPIN listing. Last updated by source: 2026-04-17. Page built 2026-11-03.

Other testing sites nearby

North Iowa Community Action Organization – Family Planning, WIC, and Maternal/Child Health

100 1st St NW, Ste 200, Mason City, IA 50401 · (800) 657-5856
Free testing listedSliding scaleChlamydiaGonorrheaSyphilisHerpesHIVHepatitis CHepatitis B
Mon 7:30am – 4:30pm; Tue 7:30am – 4:30pm; Wed 7:30am – 4:30pm; Thu 7:30am – 4:30pm; Fri 7:30am – 4:30pm

Community Health Center of Fort Dodge – Mason City Health Center

404 N Federal Ave, Mason City, IA 50401 · (641) 450-0601
Sliding scaleChlamydiaGonorrheaSyphilisHerpesHIVRapid HIVHepatitis CHepatitis B
Mon 8:00am – 5:00pm; Tue 8:00am – 5:00pm; Wed 8:00am – 5:00pm; Thu 8:00am – 5:00pm; Fri 8:00am – 5:00pm

Cerro Gordo County Department of Public Health

2570 4th St SW, Ste 1, Mason City, IA 50401 · (641) 421-9300
Free testing listedChlamydiaGonorrheaSyphilisHerpesHIVRapid HIVHepatitis CHepatitis B
Mon 8:00am – 4:30pm; Tue 8:00am – 4:30pm; Wed 8:00am – 4:30pm; Thu 8:00am – 4:30pm; Fri 8:00am – 4:30pm