Warren C. Hayes, MD

Medicare activity in 2024

Official CMS public-use data for Warren C. Hayes, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a (G0179)47 services
2. Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)26 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol73%
• Arthritis60%
• Depression47%
• Anxiety43%
• Chronic kidney disease43%

Hospitals where Warren C. Hayes works

Medicare's Facility Affiliation Data lists Warren C. Hayes at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Clarinda Regional Health CenterClarinda, IA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 161352
• Montgomery County Memorial HospitalRed Oak, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161363
• Shenandoah Medical CenterShenandoah, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161366

Practice locations

Addresses where Warren C. Hayes is enrolled with Medicare (CMS data updated October 2, 2026).

• 1400 Senate Ave, 102 Women'S Health ClinicRed Oak, IA 51566 (712) 623‑6335
• 2301 Eastern AveRed Oak, IA 51566 (712) 623‑7000

Group practices

Medicare enrollment lists Warren C. Hayes as a member of this group (CMS data updated October 2, 2026).

• Montgomery County Memorial Hospital43 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Iowa →

Other family doctors in Red Oak

Clinicians with the same Medicare primary specialty in Red Oak, IA — not a recommendation.

• Tu Anh T. Luong, MD
• Thomas M. Baer, MD
• Brian E. Couse, MD
• Scott D. Hoffman, DO
• Angela M. Kerchner, MD
• William R. Butz, MD

All family doctors in Red Oak →

Other clinicians in Montgomery County Memorial Hospital

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Abby Johnson
• Eduard Grass Garcia, MD
• Thomas Z. Schmadeke, PA
• Michelle M. Vance
• Thomas M. Baer, MD
• Donald P. Scarborough, PA

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians