Dr. Peter Nathan Barish, MD

Dr. Barish practices at UCSF St Mary's Hospital in San Francisco, California.

Dr. Barish's NPI, 1366861379, was assigned on April 8, 2014. Dr. Barish holds California license A150156.

Dr. Barish's primary practice is UCSF St Mary's Hospital, at 450 Stanyan St, San Francisco, CA 94117 in San Francisco County. The practice phone is (415) 353-4739.

Dr. Barish's primary practice is UCSF St Mary's Hospital in San Francisco, California. Dr. Barish is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Barish to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barish practices, 5 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Barish's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Barish is licensed in California.

CMS data shows 306 Medicare services from Dr. Barish across 6 procedure codes in 2024, for 95 Medicare patients. Medicare paid $28,516 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 95 Medicare patients who saw Dr. Barish in 2024. The largest group is 65 to 74, with 32 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 53% are also on Medicaid. Their average risk score is 3.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Barish's median patient age at 72, with 50% women.

In 2024, Dr. Barish wrote 81 Medicare Part D claims for 35 patients. 85% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $191 in total drug cost. In 2016, CMS named 51 claims across 3 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Barish for performance year 2024, reported as part of a group. Dr. Barish accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 8 papers to Dr. Barish, published from 2020 to 2025. 2020 was the busiest year, with 3. Dr. Barish has published most often in JAMA Intern Med. Dr. Barish's most frequent co-authors are Molly Anne Marie Kantor, MD, Stephanie McCarty Conner, MD and Rand Michael Dadasovich, MD.