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

Dr. John Henry Stock, MD

Pediatric Cardiology Physician in Tempe, AZ · enumerated 2006.

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

National Provider Identifier

1366467094

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Registry record

Entity type Individual (Type 1)

Name Dr. John Henry Stock

Credential MD

Sex Male

Practice address Tempe, AZ, 85283

Phone (480) 755-1000

Fax (480) 755-0011

Enumeration date Jul 13, 2006

Last updated in NPPES May 3, 2017

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

Taxonomy & licenses

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians · License 25426 (AZ) 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

How do I verify John Stock's NPI record?

Cross-check NPI 1366467094 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1366467094 active?

Yes — as of the latest NPPES snapshot, NPI 1366467094 is active (record last updated 2017-05-03).

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Sharon Pfeiffer Pediatric Nurse Practitioner · Tempe, AZ NPI 1396759510

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-05-03.