Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jason L Stemmer, MD

Nuclear Cardiology 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

1366445280

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Jason L Stemmer

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 Feb 22, 2011

Taxonomy & licenses

207UN0901X Nuclear Cardiology Physician Allopathic & Osteopathic Physicians · License 15516 (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
22674	Other	AZ	PREFERRED HEALTH NETWORK
10055690	Other	AZ	PPO NEXT
116500	Medicaid	AZ	-
87660	Other	AZ	FIRST HEALTH
100668	Other	AZ	ONE HEALTH
1Z2849	Other	AZ	HEALTH NET
5033185	Other	AZ	CCN
AZ0860410	Other	AZ	BCBS OF ARIZONA
38-00005	Other	AZ	UNITED HEALTHCARE
4140	Other	AZ	ARIZONA MEDICAL NETWORK
005502302	Other	AZ	CIGNA
2591552	Other	AZ	GHI
360004138	Other	AZ	RAILROAD MEDICARE
XPY198499	Medicaid	CA	-
4663616	Other	AZ	AETNA

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

How do I verify Jason Stemmer's NPI record?

Cross-check NPI 1366445280 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1366445280 active?

Yes, as of the latest NPPES snapshot, NPI 1366445280 is active (record last updated 2011-02-22).

Other providers at this practice address

Browse all →

Elizabeth Attig Cardiovascular Disease Physician · Tucson, AZ NPI 1548263783 Gregory Koshkarian Cardiovascular Disease Physician · Tucson, AZ NPI 1164425096 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 2011-02-22.