Charles O. Gensmer, MD

Medicare activity in 2024

Official CMS public-use data for Charles O. Gensmer, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)130 services
2. Test to measure expiratory airflow and volume changes before and after medication administration (94060)85 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)80 services
4. Test to determine lung volumes using sensors (94726)54 services
5. Test to determine lung volumes using gas dilution or washout (94727)45 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 pressure72%
• High cholesterol71%
• COPD45%
• Arthritis44%
• Ischemic heart disease41%
• Depression39%

Hospitals where Charles O. Gensmer works

Medicare's Facility Affiliation Data lists Charles O. Gensmer 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.

• Allina Health Faribault Medical CenterFaribault, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240071
• Allina United HospitalSaint Paul, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240038
• Buffalo HospitalBuffalo, MN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 240076
• Cambridge Medical CenterCambridge, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240020
• Mercy HospitalCoon Rapids, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240115

Practice locations

Addresses where Charles O. Gensmer is enrolled with Medicare (CMS data updated October 2, 2026).

• 440 Elm St EAnnandale, MN 55302 (320) 682‑5225

Group practices

Medicare enrollment lists Charles O. Gensmer as a member of this group (CMS data updated October 2, 2026).

• Allina Health System3,842 clinicians in the group

Specialties

• Pulmonary Diseaseprimary
• Internal Medicinealso
• Sleep Medicinealso

Find other Pulmonary Disease doctors in Minnesota →

Other pulmonologists in Annandale

Clinicians with the same Medicare primary specialty in Annandale, MN — not a recommendation.

• Mark R. Freiberg, MD
• Naeem A. Adhami, MD
• Kirstin E. Brown, DO
• David A. Teeters, MD
• Kirana Narayana, MD
• Joseph M. Lasnier, MD
• Samy M. El-Halawani, DO

All pulmonologists in Annandale →

Other clinicians in Allina Health System

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

• Haley J. Newberry
• Adam R. Meier, CNA
• Katie J. Lorentz, MD
• Keary L. Johnson, MD
• Geness Patpatia, MD
• Tucker N. Zimmer, MD

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