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

Harry Berj Matossian, M.D.

Gastroenterology Physician in Ukiah, CA · enumerated 2005.

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

National Provider Identifier

1316945702

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Registry record

Entity type Individual (Type 1)

Name Harry Berj Matossian

Credential M.D.

Sex Male

Practice address Ukiah, CA, 95482

Phone (707) 462-0681

Fax (707) 462-4647

Enumeration date Jul 11, 2005

Last updated in NPPES Aug 26, 2024

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

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G62323 (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
ZZZ56549Z	Other	CA	BLUE SHIELD OF CALIFORNIA
00G623230	Medicaid	CA	-

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

What is the NPI number for Harry Matossian?

The National Provider Identifier (NPI) for Harry Matossian is 1316945702, a Type 1 (individual) record in the CMS NPPES registry.

Where does Harry Matossian practice?

The practice location on file with NPPES is in Ukiah, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Harry B. Matossian Ambulatory Surgical Clinic/Center · Ukiah, CA NPI 1003814229 Brian Hauck Gastroenterology Physician · Ukiah, CA NPI 1649384751 Craig Aronchick Gastroenterology Physician · Ukiah, CA NPI 1710071774 Renee Vinyard Physician Assistant · Ukiah, CA NPI 1972673895 Harry B Matossian, M.D. Ambulatory Surgical Clinic/Center · Ukiah, CA NPI 1851682850 Adventist Health Physicians Network Gastroenterology Physician · Ukiah, CA NPI 1164804761 Stacie Bratcher Family Nurse Practitioner · Ukiah, CA NPI 1174281281 Bryce Irwin Medical Physician Assistant · Ukiah, CA NPI 1316739501

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-26.