Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Michael A. Matthay, MD

Individual provider Internal Medicine Physician · NPI 1891734497

Dr. Michael A. Matthay, MD is registered under Critical Care (Intensivists) in San Francisco, California. Graduated from Perelman School of Med at the University of Pennsylvania in 1973, 53 years ago. Practices with University Anesthesia Medical Group, a 404-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
53
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
CA
In the registry since
2006
Specialties on file
3
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

505 Parnassus Ave
San Francisco, CA 94143-2204 Not confirmed with CMS for 18 years — call before visiting
Phone: (415) 353-2873
Fax: (415) 353-1990
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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 G33560 (CA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence G33560 (CA)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence G33560 (CA)

Record details

NPI number1891734497
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 6, 2006
Last updated in NPPESJuly 24, 2008

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesPULMONARY DISEASE
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 1973 (53 years in practice)
Group practice University Anesthesia Medical Group — 404 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients16
Services billed 51 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.

Colleagues at University Anesthesia Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 404 clinicians in the practice; 12 are shown here.

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