Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Carolyn A Matzinger MD A Professional Corporation

Internal Medicine Physician in Susanville, CA · enumerated 2009 · authorized official Carolyn Matzinger, Physician.

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

National Provider Identifier

1639304116

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Carolyn A Matzinger MD A Professional Corporation

Practice address 1800 Spring Ridge Dr, Susanville, CA, 96130

Phone (530) 252-2000

Enumeration date May 27, 2009

Last updated in NPPES May 27, 2009

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C50852 (CA) Primary

Authorized official

Name Carolyn Matzinger

Title Physician

Phone (702) 380-1974

Other identifiers

Identifier	Type	State	Issuer
C50852	Other	CA	CALIFORNIA MEDICAL LICENSE
10187	Other	NV	MEDICAL 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Carolyn A Matzinger MD A Professional Corporation located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2009-05-27. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-27.