Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles A Judge, M.D.

Internal Medicine Physician in Prince Frederick, MD · enumerated 2007 · practices at Calvert Internal Medicine Group PA.

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

National Provider Identifier

1821147489

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles A Judge

Credential M.D.

Sex Male

Practice address 985 Prince Frederick Blvd Ste 201, Prince Frederick, MD, 20678

Phone (410) 535-2005

Fax (410) 535-4850

Enumeration date Jan 10, 2007

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D29657 (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
11032508	Other	MD	RAILROAD MEDICARE
2148224	Other	MD	AETNA HMO PCP
836800	Other	MD	MAMSI HMO PCP
326941800	Medicaid	MD	-
41576201	Other	MD	CAREFIRST OF MARYLAND
4461101	Other	MD	AETNA NON-HMO PCP
C0410004	Other	DC	CAREFIRST OF DC

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

Where does Charles Judge practice?

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

What is the NPI number for Charles Judge?

The National Provider Identifier (NPI) for Charles Judge is 1821147489, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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