Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Peter Rock, MD

Q: What is the NPI number for Peter Rock?

The National Provider Identifier (NPI) for Peter Rock is 1811949852, a Type 1 (individual) record in the CMS NPPES registry.

Anesthesiology Physician in Baltimore, MD · enumerated 2006.

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

National Provider Identifier

1811949852

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter Rock

Credential MD

Sex Male

Practice address 110 S Paca St, 6th Floor Suite 300, Baltimore, MD, 21201

Phone (410) 328-6331

Fax (410) 328-6120

Enumeration date May 17, 2006

Last updated in NPPES Apr 8, 2008

Taxonomy & licenses

207LC0200X Critical Care Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License D0025046 (MD) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License D0025046 (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
CA8702	Other	MD	RAILROAD MEDICARE GROUP

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 is the NPI number for Peter Rock?

The National Provider Identifier (NPI) for Peter Rock is 1811949852, a Type 1 (individual) record in the CMS NPPES registry.

Where does Peter Rock practice?

The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-08.