Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Katherine R. Newcomb M.D. Medical Corp

Internal Medicine Physician in Groveland, CA · enumerated 2013 · authorized official Katherine Newcomb, Ceo.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1285977587

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Registry record

Entity type Organization (Type 2)

Legal business name Katherine R. Newcomb M.D. Medical Corp

Practice address 18661 Main St, Groveland, CA, 95321

Phone (209) 962-7121

Fax (209) 962-0665

Enumeration date Apr 4, 2013

Last updated in NPPES Apr 4, 2013

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G59102 (CA) Primary

Authorized official

Name Katherine Newcomb

Title Ceo

Phone (209) 770-5283

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-04-04. Verify at npiregistry.cms.hhs.gov.

Where is Katherine R. Newcomb M.D. Medical Corp located?

The practice location on file with NPPES is in Groveland, CA.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-04.