Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Merrill Koshkarian, MD

Cardiovascular Disease Physician in Tucson, AZ · enumerated 2005 · practices at Heart Care of Southern Arizona, PC.

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

National Provider Identifier

1164425096

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Registry record

Entity type Individual (Type 1)

Name Gregory Merrill Koshkarian

Credential MD

Sex Male

Practice address 6080 N La Cholla Blvd # 200, Tucson, AZ, 85741

Phone (520) 797-8550

Fax (520) 797-6986

Enumeration date May 24, 2005

Last updated in NPPES Jan 29, 2020

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 24327 (AZ) 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
1033508	Other	AZ	FIRST HEALTH
10055687	Other	AZ	PPO NEXT
1Z3634	Other	AZ	HEALTH NET
351057	Medicaid	AZ	-
XPY196923	Medicaid	CA	-
102612	Other	AZ	PREFERRED HEALTH NETWORK
5073466	Other	AZ	CCN
0143348	Other	WA	STATE OF WA DEPT OF LABOR
100666	Other	AZ	ONE HEALTH
AZ0860310	Other	AZ	BCBS OF ARIZONA
060057126	Other	AZ	RAILROAD MEDICARE
1172298 00	Medicaid	WY	-
5132491	Other	AZ	AETNA
005502491	Other	AZ	CIGNA
2198525	Other	AZ	GHI
25-00275	Other	AZ	UNITED HEALTHCARE
8274243	Other	WA	STATE OF WA HLTH & SOC SR

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 Koshkarian?

The National Provider Identifier (NPI) for Gregory Koshkarian is 1164425096, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Koshkarian practice?

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

Other providers at this practice address

Browse all →

Elizabeth Attig Cardiovascular Disease Physician · Tucson, AZ NPI 1548263783 Jason Stemmer Nuclear Cardiology Physician · Tucson, AZ NPI 1366445280 Heart Care of Southern Arizona, PC Cardiovascular Disease Physician · Tucson, AZ NPI 1235132838

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-29.