Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John D. Martin, M.D.

Vascular Surgery Physician in Annapolis, MD · enumerated 2006.

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

National Provider Identifier

1538176482

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. John D. Martin

Credential M.D.

Sex Male

Practice address 116 Defense Hwy Ste 100, Annapolis, MD, 21401

Phone (410) 571-5545

Fax (410) 571-5334

Enumeration date Aug 2, 2006

Last updated in NPPES Mar 6, 2026

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License D45019 (MD) Primary

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License D45019 (MD) Secondary

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
CD0361	Other	-	RAILROAD GROUP NUMBER

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 specialty is John Martin?

John Martin is registered in NPPES with the primary taxonomy of Vascular Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-06.