TIM W. GRENNAN MD
NPI 1972681617
Internal Medicine - Hematology & Oncology in Sacramento, CA

Q: What is Tim Grennan's NPI number?

The NPI number for Tim Grennan is 1972681617. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Q: What is Tim Grennan's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Tim Grennan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.

Active since November 01, 2006

2025 MORSE AVE, SACRAMENTO, CA 95825(916) 973-5000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Tim W. Grennan Md NPPES

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

TIM W. GRENNAN MD (NPI 1972681617) is an individual hematology & oncology provider in Sacramento, California, licensed in California (G49590) and active in the NPI registry since November 2006.

NPPES Registry Identity

NPI1972681617

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameTIM W. GRENNANCredential: MD

Location Address2025 MORSE AVESacramento, CA 95825-2115

Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3429 · (510) 625-6262

Phone(916) 973-5000

Sole ProprietorNo

Enumeration DateNovember 1, 2006

Last NPPES UpdateJuly 8, 2007

✔ NPI 1972681617 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 · G49590

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.

2025 MORSE AVE, Sacramento, CA 95825

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Other Identifiers 3

Medicare ID-Type Unspecified00G495900

Medicare UPINF14052

Medicaid00G495900CA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHARON KAY MCCOY FNP

Nurse Practitioner (Family)