Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Michael Annulis, MD

Hospitalist Physician in Prince Frederick, MD · enumerated 2006.

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

National Provider Identifier

1073589503

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Registry record

Entity type Individual (Type 1)

Name Thomas Michael Annulis

Credential MD

Sex Male

Practice address 100 Hospital Rd, Prince Frederick, MD, 20678

Phone (410) 535-4000

Fax (410) 535-8224

Enumeration date Feb 24, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License D0052401 (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
52970026	Other	DC	CAREFIRST DC
54677904	Other	MD	CAREFIRST MD

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.

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Frequently asked questions

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.

What specialty is Thomas Annulis?

Thomas Annulis is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.