1. Home
  2. Directory
  3. California
  4. Mill Valley
  5. Internal Medicine
  6. NPI Profile

ROBERT MASS MD
NPI 1386086460
Internal Medicine - Hematology & Oncology in Mill Valley, CA

Active since July 18, 2013
106 ELINOR AVE, MILL VALLEY, CA 94941(415) 497-2225 Get Directions Write a Review

NPPES record last updated: July 18, 2013. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Robert Mass Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROBERT MASS MD (NPI 1386086460) is an individual hematology & oncology provider in Mill Valley, California, licensed in California (G50060) and active in the NPI registry since July 2013.

NPPES Registry Identity

NPI1386086460
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameROBERT MASSCredential: MD
Location Address106 ELINOR AVEMill Valley, CA 94941-1220
Mailing Address106 Elinor AveMill Valley, CA 94941-1220
Phone(415) 497-2225
Sole ProprietorYes
Enumeration DateJuly 18, 2013
✔ NPI 1386086460 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · G50060
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
106 ELINOR AVE, Mill Valley, CA 94941
Open in Google Maps ↗

Other Identifiers 1

OtherG50060CA · Physician

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Mass's NPI number?

The NPI number for Robert Mass is 1386086460. It was assigned to this individual provider in the NPPES registry on July 18, 2013.

Where is Robert Mass located?

Robert Mass practices at 106 Elinor Ave, Mill Valley, CA 94941. The listed phone number is (415) 497-2225.

What is Robert Mass's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Robert Mass was last updated on July 18, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.