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Katherine Diemer, MD

4.7 out of 5 · 201 reviews

Family Medicine • Freeport, IL • Since 1872

About

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Katherine Diemer, MD is associated with SSM Health’s Freeport, Illinois location. SSM Health is a Catholic, nonprofit health system serving the Midwest (IL, MO, OK, WI) with hospitals, primary and urgent care, and virtual/ambulatory services. The system emphasizes compassionate, patient-centered care and operates through hospitals, physician offices, home/hospice services, a transparent pharmacy benefit company, a health insurance subsidiary, and an accountable care organization. For Freeport-specific details (address, services, schedule), contact the Freeport site or SSM Health directly.

Clinic Type

Family Medicine

Address

1301 Kiwanis Drive, Freeport, IL 61032

Phone

815-235-1406

Email

community.benefits@ssmhealth.com

Opening Hours

7:30 am - 5:00 pm

Website

https://www.getcare.ssmhealth.com/find-a-doctor/doctor-details/katherine-a-diemer-md

Telehealth

Yes

Services Offered

  • Family Medicine
  • Family Medicine/Katherine Diemer

Team

  • Katherine Diemer, MD, MD — Physician

Insurance & Payment

—

Languages Spoken

—

FAQs

What are the hours for SSM Health Monroe Clinic Medical Group?

7:30 am - 5:00 pm

Social Media

TwitterYoutubeFacebookLinkedinInstagram

Photos

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What Patients Say

Overall sentiment across review platforms: positive

  • Ratings.MD: 4.7 out of 5 (102)
  • SSM Health Official Site: 4.8 out of 5 (96)
  • WebMD Care: 2.5 out of 5 (3)
  • Healthgrades: 3.0 stars (2)

Patients praise

  • Takes time to listen to concerns
  • Easy to understand explanations
  • Caring, empathetic, and compassionate demeanor
  • Knowledgeable physician
  • Personable and professional

Common complaints

  • Limited number of low ratings on some aggregate sites

"Katherine is a caring and empathetic person. She takes the time to listen to me and explain things."

— Ratings.MD

"Very knowledgeable physician. Kind caring and compassionate."

— Ratings.MD/SSM Health

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

In the News

Information sourced from the clinic's website as of July 11, 2026.

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