Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Ali-Reza Barmaki, MD

Individual provider Internal Medicine Physician · NPI 1003921461

Dr. Ali-Reza Barmaki, MD practises Internal Medicine in Walnut Creek, California. Qualified in 2003, 23 years ago. Practices with Department of State Hospitals, a 276-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
23
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1220 Rossmoor Pkwy
Walnut Creek, CA 94595-2501 Not confirmed with CMS for 14 years — call before visiting
Phone: (925) 947-3393
Fax: (925) 947-3396
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A92599 (CA)

Record details

NPI number1003921461
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 19, 2006
Last updated in NPPESJune 17, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesHOSPITALIST
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Department Of State Hospitals — 276 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients50
Services billed 67 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Department of State Hospitals

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 276 clinicians in the practice; 12 are shown here.

Other providers in Walnut Creek