Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John T Duddy, M.D.

Orthopaedic Foot and Ankle Surgery Physician in Anchorage, AK · enumerated 2006.

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

National Provider Identifier

1629132022

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Registry record

Entity type Individual (Type 1)

Name Dr. John T Duddy

Credential M.D.

Sex Male

Practice address 2741 Debarr Rd Ste C305, Anchorage, AK, 99508

Phone (907) 278-8141

Fax (907) 279-3527

Enumeration date Dec 20, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 4235 (AK) Secondary

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License 4235 (AK) Secondary

207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License 4235 (AK) 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
MD1419	Medicaid	AK	-

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 Duddy's NPI record?

Cross-check NPI 1629132022 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1629132022 active?

Yes, as of the latest NPPES snapshot, NPI 1629132022 is active (record last updated 2025-09-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.