Dr. Frederick M. Dirbas, MD

Dr. Dirbas practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Dirbas' NPI, 1154457091, was assigned on February 26, 2007. Dr. Dirbas graduated from Vagelos College of Physicians and Surgeons in 1985. Dr. Dirbas holds California license G58935.

Dr. Dirbas' primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Dr. Dirbas' primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Dirbas to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account. Dr. Dirbas' employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dirbas practices, 4 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Dirbas' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Dirbas is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Dirbas' licenses on file in 2 states: California and Maryland.

Dmand AI lists mastectomy among the conditions Dr. Dirbas treats.

CMS data shows 47 Medicare services from Dr. Dirbas across 2 procedure codes in 2024, for 49 Medicare patients. Medicare paid $22,676 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 49 Medicare patients who saw Dr. Dirbas in 2026. The largest group is 75 to 84, with 24 patients. 75% of them have cancer, and 75% have high cholesterol. Their average risk score is 0.87, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Dirbas' median patient age at 57, with 97% women.

In 2018, Dr. Dirbas wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $145 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Dirbas for performance year 2026, reported as part of a group. Dr. Dirbas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Dirbas as offering telehealth. CMS counts 49 procedures of mastectomy by Dr. Dirbas, more than 94% of the clinicians it reports for that procedure.

Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 57 papers to Dr. Dirbas, published from 2006 to 2025. 2020 was the busiest year, with 7. The most frequent topics are Breast Neoplasms, Carcinoma, Ductal, Breast and Mastectomy. Dr. Dirbas has published most often in Ann Surg Oncol. Dr. Dirbas' most frequent co-authors are Kathleen Claire Horst, MD, Stefanie Jeffrey, MD and Debra Masako Ikeda, MD.

Dmand AI links Dr. Dirbas to 3 clinical trials. 1 is still active or recruiting. Conditions studied include Breast Neoplasms, Carcinoma, Ductal and Carcinoma, Intraductal, Noninfiltrating. Stanford University sponsors the most, 2.

CMS Open Payments shows 2 general payments to Dr. Dirbas from 2 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Sientra, Inc. paid the most, $136.

Dmand AI lists 4 awards for Dr. Dirbas, most recently Top Doctors in 2022.

Dr. Dirbas graduated from Vagelos College of Physicians and Surgeons in 1985. Dr. Dirbas is a member of AOA, American Association for Cancer Research, American Brachytherapy Society, ACS, ASTRO and ASBS.

Dr. Dirbas is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.