Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Joseph John Barth III, MD

Q: What is the NPI number for Joseph Barth?

The National Provider Identifier (NPI) for Joseph Barth is 1164571741, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Prince Frederick, MD · enumerated 2007.

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

National Provider Identifier

1164571741

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Registry record

Entity type Individual (Type 1)

Name Dr. Joseph John Barth III

Credential MD

Sex Male

Practice address 110 Hospital Rd Ste 310, Prince Frederick, MD, 20678

Phone (410) 535-2005

Fax (410) 535-4850

Enumeration date Jan 10, 2007

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D52242 (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
2148224	Other	MD	AETNA HMO PCP
4461101	Other	MD	AETNA NON-HMO PCP
54593701	Other	MD	CAREFIRST OF MARYLAND
849934	Other	MD	MAMSI HMO PCP
678540900	Medicaid	MD	-
110146591	Other	MD	RAILROAD MEDICARE
C0410019	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Joseph Barth 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 Joseph Barth?

The National Provider Identifier (NPI) for Joseph Barth is 1164571741, 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 2007-07-09.