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

Dr. James Weldon Maas, MDPHD

Individual provider Neurology Physician · NPI 1255506788

Dr. James Weldon Maas, MDPHD practises Neurology in San Francisco, California. Graduated from Washington University School of Medicine in 2006, 20 years ago. Practices with University of California San Francisco, a 1,793-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
20
Trained at
Washington University School of Medicine
Licensed in
CA
In the registry since
2008
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Practice location Address checks out

505 Parnassus Avenue UCSF Dept OF Neurology
San Francisco, CA 94143-0114 Not confirmed with CMS for 18 years — call before visiting
Phone: (415) 476-1489
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence A102712 (CA)

Record details

NPI number1255506788
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorNo
NPI enumeratedApril 25, 2008
Last updated in NPPESApril 25, 2008

Medicare enrollment

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

Medicare specialtyNEUROLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice University Of California San Francisco — 1793 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients109
Services billed 427 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 of California San Francisco

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1793 clinicians in the practice; 12 are shown here.

Other providers in San Francisco