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

Mr. Jack R Lichtenstein, MD

Internal Medicine Physician in Annapolis, MD · enumerated 2006.

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

National Provider Identifier

1609844224

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Registry record

Entity type Individual (Type 1)

Name Mr. Jack R Lichtenstein

Credential MD

Sex Male

Practice address Annapolis, MD, 21401

Phone (410) 263-6910

Fax (443) 443-0456

Enumeration date Mar 9, 2006

Last updated in NPPES Feb 21, 2008

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D08194 (MD) Primary

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License D08194 (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
J1740003	Other	DC	CAREFIRST
3304001	Other	MD	CAREFIRST

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 Jack Lichtenstein?

Jack Lichtenstein is registered in NPPES with the primary taxonomy of Internal Medicine 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-21.