Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Charles Merwin, MD

Anatomic Pathology & Clinical Pathology Physician in Oroville, CA · enumerated 2006.

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

National Provider Identifier

1326158445

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Michael Charles Merwin

Credential MD

Sex Male

Practice address 2767 Olive Highway, Department of Pathology Oroville Hospital Locums, Oroville, CA, 95966

Phone (530) 532-8320

Enumeration date Aug 30, 2006

Last updated in NPPES Feb 28, 2014

Taxonomy & licenses

207ZC0500X Cytopathology Physician Allopathic & Osteopathic Physicians · License 84219 (NM) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License G85015 (CA) Primary

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

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

Is NPI 1326158445 active?

Yes, as of the latest NPPES snapshot, NPI 1326158445 is active (record last updated 2014-02-28).

How do I verify Michael Merwin's NPI record?

Cross-check NPI 1326158445 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-28.