Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Paul F. Stemmer, MD

Surgery Physician in Big Bear Lake, CA · enumerated 2005.

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

National Provider Identifier

1891798112

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Registry record

Entity type Individual (Type 1)

Name Dr. Paul F. Stemmer

Credential MD

Sex Male

Practice address Big Bear Lake, CA, 92315

Phone (909) 878-8246

Fax (909) 878-8294

Enumeration date May 31, 2005

Last updated in NPPES Mar 11, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G63347 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
G63347	Other	CA	CA LICENSE

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.

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Frequently asked questions

How do I verify Paul Stemmer's NPI record?

Cross-check NPI 1891798112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891798112 active?

Yes, as of the latest NPPES snapshot, NPI 1891798112 is active (record last updated 2026-03-11).

Other providers at this practice address

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Bear Valley Community Health Care District Rural Health Clinic/Center · Big Bear Lake, CA NPI 1851576888 Nichole Mcgivney Community Health Worker · Big Bear Lake, CA NPI 1437554375 Cary Stewart MD Inc Rural Health Clinic/Center · Big Bear Lake, CA NPI 1275998411 Paul Kalfell Pediatric Nurse Practitioner · Big Bear Lake, CA NPI 1710422126 Angelica Rodriguez Pacheco Community Health Worker · Big Bear Lake, CA NPI 1790565760 Johanna Wierzbicki Community Health Worker · Big Bear Lake, CA NPI 1326828302 The Mom & Dad Project Case Management Agency · Big Bear Lake, CA NPI 1962262097

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-11.