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

Merrill Ralph Nisam, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1205824067

Merrill Ralph Nisam, MD is a Critical Care (Intensivists) in Larkspur, California. Graduated from University of California, Davis School of Medicine in 1980, 46 years ago. Practices with Regents Univ of California UCSF, a 272-clinician group and offers telehealth. Licensed in California.

Years since qualifying
46
Trained at
University of California, Davis School of Medicine
Licensed in
CA
In the registry since
2005
Specialties on file
2
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

1100 Larkspur Landing Cir Ste 10
Larkspur, CA 94939-1836
Phone: (415) 924-1214
Fax: (415) 924-1375
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence A45217 (CA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence A45217 (CA)

Record details

NPI number1205824067
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 6, 2005
Last updated in NPPESDecember 16, 2025
Certification dateDecember 16, 2025

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesPULMONARY DISEASE
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Regents Univ Of California Ucsf — 272 clinicians
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services

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