Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allan Doctor, MD

Pediatric Critical Care Medicine Physician in Baltimore, MD · enumerated 2006.

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

National Provider Identifier

1659450484

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Registry record

Entity type Individual (Type 1)

Name Dr. Allan Doctor

Credential MD

Sex Male

Practice address 22 S Greene St Ste G4k400, Baltimore, MD, 21201

Phone (410) 328-6957

Fax (410) 328-0680

Enumeration date Nov 3, 2006

Last updated in NPPES Jan 6, 2020

Taxonomy & licenses

207LP3000X Pediatric Anesthesiology Physician Allopathic & Osteopathic Physicians · License 2006031510 (MO) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 2006031510 (MO) Secondary

2080P0203X Pediatric Critical Care Medicine Physician Allopathic & Osteopathic Physicians · License 2006031510 (MO) Secondary

2080P0203X Pediatric Critical Care Medicine Physician Allopathic & Osteopathic Physicians · License D88326 (MD) 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
204914402	Medicaid	MO	-
502384000	Medicaid	MD	-
ENROLLED	Medicaid	IL	-

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 Allan Doctor's NPI record?

Cross-check NPI 1659450484 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659450484 active?

Yes, as of the latest NPPES snapshot, NPI 1659450484 is active (record last updated 2020-01-06).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-06.