Ardin S. Berger, DO

Medicare activity in 2024

Official CMS public-use data for Ardin S. Berger, 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 straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)100 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)37 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)36 services
4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)17 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%
• Arthritis75%
• Depression58%
• Anxiety57%
• Chronic kidney disease50%

Hospitals where Ardin S. Berger works

Medicare's Facility Affiliation Data lists Ardin S. Berger 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.

• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180

Practice locations

Addresses where Ardin S. Berger is enrolled with Medicare (CMS data updated October 2, 2026).

• 1601 Ygnacio Valley RdWalnut Creek, CA 94598 (925) 939‑3000
• 2000 Mowry AveFremont, CA 94538 (510) 797‑1111
• 2100 Napa Vallejo HwyNapa, CA 94558 (916) 651‑8811

Group practices

Medicare enrollment lists Ardin S. Berger as a member of these groups (CMS data updated October 2, 2026).

• Cep America - Anesthesia PC849 clinicians in the group
• Department of State Hospitals270 clinicians in the group

Specialties

• Anesthesiologyprimary
• Pain Managementalso

Find other Anesthesiology doctors in California →

Other anesthesiologists in Walnut Creek

Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.

• Yulia Rozen, MD
• Vishal P. Vazirani, MD
• Ryan B. Green, MD
• Sarah S. Joo, MD
• Dan Wajsman, MD
• Divakar Joshi, DO
• Luis A. Sanguino Ramos, MD
• Mohit Bhatt, DO

All anesthesiologists in Walnut Creek →

Other clinicians in Cep America - Anesthesia PC

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

• Andrew Riester, MD
• Mark M. McGraw, CNA
• Anish Garg, DO
• Michael Redd, CNA
• Wolf B. Kratzert, MD
• Eric Meyer, 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