Irina Kolomey, DO

Medicare activity in 2024

Official CMS public-use data for Irina Kolomey, 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. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)461 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)369 services
3. Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)102 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)89 services
5. Face-to-face behavioral counseling for obesity, 15 minutes (G0447)71 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%
• Arthritis49%
• Diabetes37%
• Anxiety29%
• Ischemic heart disease27%

Hospitals where Irina Kolomey works

Medicare's Facility Affiliation Data lists Irina Kolomey 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 - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
• 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 Irina Kolomey is enrolled with Medicare (CMS data updated October 2, 2026).

• 1804 San Miguel DrWalnut Creek, CA 94596 (925) 363‑3395

Specialties

• Internal Medicineprimary
• Osteopathic Manipulative Medicinealso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Walnut Creek

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

• Gretchen E. Kunitz, MD
• Ziad Sergie, MD
• Kaveh Hoda, MD
• Tanaaz B. Baldawala, MD
• David Nathanson, DO
• Prabodh Rathi
• Daniel J. Fermi, MD
• Devorah E. Ben-Zeev, MD

All internal medicine doctors in Walnut Creek →

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