Gunther Ottersbach, MD

Medicare activity in 2024

Official CMS public-use data for Gunther Ottersbach, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)348 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)265 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)139 services
4. Hospital discharge day management, more than 30 minutes (99239)112 services
5. Hospital discharge day management, 30 minutes or less (99238)12 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 cholesterol75%
• Diabetes53%
• Arthritis52%
• Heart failure48%
• Ischemic heart disease47%

Hospitals where Gunther Ottersbach works

Medicare's Facility Affiliation Data lists Gunther Ottersbach 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.

• Grossmont HospitalLa Mesa, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050026

Practice locations

Addresses where Gunther Ottersbach is enrolled with Medicare (CMS data updated October 2, 2026).

• 5555 Grossmont Ctr DrLa Mesa, CA 91942 (619) 461‑1920
• 7901 Frost StSan Diego, CA 92123 (858) 939‑3400

Group practices

Medicare enrollment lists Gunther Ottersbach as a member of these groups (CMS data updated October 2, 2026).

• Emergency and Acute Care Medical Corporation422 clinicians in the group
• San Diego Critical Care Medical Group Inc78 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in La Mesa

Clinicians with the same Medicare primary specialty in La Mesa, CA — not a recommendation.

• Rabee Y. Paul, MD
• Mansour Mofidi, DO
• Michael F. Magpile, MD
• Janak B. Patel, DO
• Thuan Nguyen, DO
• Sydney Dangelo, DO
• Paul Y. Abou, MD
• Nicola C. Bugelli, MD

All internal medicine doctors in La Mesa →

Other clinicians in Emergency and Acute Care Medical Corporation

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

• Asseel Albayati, MD
• Peter Belott
• Hai Shao, MD
• Mustafa Kaisi, MD
• John L. Otis, MD
• Justin T. Parizo, 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