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

Dr. Orest V Petrishen, N.D., PH.D., C.N.C.

Nutritionist in Los Angeles, CA · enumerated 2009.

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

National Provider Identifier

1932330867

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Orest V Petrishen

Credential N.D., PH.D., C.N.C.

Sex Male

Practice address Los Angeles, CA, 90048

Phone (323) 653-2504

Fax (323) 653-2515

Enumeration date Jul 27, 2009

Last updated in NPPES May 20, 2010

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

Taxonomy & licenses

133N00000X Nutritionist Dietary & Nutritional Service Providers · License CNC-2372 (IN) Primary

175F00000X Naturopath Other Service Providers · License NAT-375 (DC) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

Where does Orest Petrishen practice?

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

What is the NPI number for Orest Petrishen?

The National Provider Identifier (NPI) for Orest Petrishen is 1932330867, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-20.