Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory D. Andreassian, M.D.,P.A.

Surgery Physician in Fredericksburg, TX · enumerated 2005.

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

National Provider Identifier

1619973120

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory D. Andreassian

Credential M.D.,P.A.

Sex Male

Practice address 205 W Windcrest St Ste 130, Fredericksburg, TX, 78624

Phone (830) 997-6773

Fax (830) 997-1961

Enumeration date Jun 21, 2005

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License H0136 (TX) 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

What is the NPI number for Gregory Andreassian?

The National Provider Identifier (NPI) for Gregory Andreassian is 1619973120, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Andreassian practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.