Cornerstone Clinic
Direct Primary Care in Fairmont, MN
- Facts checked September 23, 2026
- Telehealth
Membership
Who it serves
Patients of all ages
Insurance
Accepts Aetna, Aplos Health Plans, Blue Cross Blue Shield, Blue Plus, Cigna, Health Partners, Humana, Medica, Medicaid (MDMN MA), Medicare, Midland's Choice, Tricare (out of network), UCare, UHC/United Healthcare, and Wellmark
Services
- Primary Care
- Chronic Conditions
- Treatments
- Procedures
- IV Therapies
- Acute, chronic, and preventive care
- Functional Medicine
- Glyphosate Detoxification
- Heavy Metal Detoxification
- Integrative Medicine
- Men’s Health/Testosterone
- Mold and Environmental Toxin Identification and Treatments
- Weight Loss Management
- Women's Health/Bio–identical Hormone Replacement
Telehealth, text and phone
Telehealth visits available throughout the week
Hours
| Monday - Friday | 8 a.m. - 5 p.m. |
|---|
Providers
Rebekah Boer, RN, MSN, C-FNP ·
Family Nurse Praticioner
Lisa Ertman, DNP, C-FNP, RN, PHN ·
Family Nurse Practitioner
Samantha Farnum
Nathan Reyelts
Denver Splinter ·
Family Nurse Practitioner
About Cornerstone Clinic
Cornerstone Clinic is located in Fairmont, Minnesota. The practice uses a hybrid model. It accepts patients of all ages. Telehealth visits are available throughout the week. Services include Primary Care, Chronic Conditions, Treatments, and Procedures. Other services include IV Therapies, Functional Medicine, Integrative Medicine, and Weight Loss Management. Rebekah Boer, RN, MSN, C-FNP, is listed as a provider and Family Nurse Praticioner. Lisa Ertman, DNP, C-FNP, RN, PHN, is listed as a provider and Family Nurse Practitioner. Samantha Farnum is listed as a provider, as is Nathan Reyelts. Denver Splinter is listed as a provider and Family Nurse Practitioner. The clinic is at 410 Downtown Plaza, Fairmont, MN 56031. Its phone number is 507-399-2100.
Sources
- Cornerstone Clinic - Rebekah Boer · cornerstone.clinic/providers/rebekah-boer · fetched September 23, 2026
- Cornerstone Clinic · cornerstone.clinic · fetched September 23, 2026
- Cornerstone Clinic - Accepted Plans · cornerstone.clinic/insurance/accepted-plans · fetched September 23, 2026
- Cornerstone Clinic - Treatments · cornerstone.clinic/services/treatments · fetched September 23, 2026
- Cornerstone Clinic - Lisa Ertman · cornerstone.clinic/providers/lisa-ertman · fetched September 23, 2026
Each fact is shown only while it is recent: prices and hours for 180 days after the check, new-patient status for 60, everything else for a year.
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