Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Joel Feirtag, M.D.

Geriatric Medicine (Internal Medicine) Physician in Silver Spring, MD · enumerated 2007.

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

National Provider Identifier

1659401131

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Registry record

Entity type Individual (Type 1)

Name Daniel Joel Feirtag

Credential M.D.

Sex Male

Practice address 3110 Gracefield Rd, Silver Spring, MD, 20904

Phone (301) 572-8340

Fax (301) 572-8403

Enumeration date Mar 6, 2007

Last updated in NPPES Jul 16, 2009

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License D0023855 (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
0054	Other	-	CAREFIRST BCBS
0943ER-311120-02	Other	-	CAREFIRST BCBS OF MD
311120-02	Other	-	BCBS MD
P17416	Other	-	BCBS DC
04-21635	Other	-	EVERCARE
312031700	Medicaid	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 Daniel Feirtag?

Daniel Feirtag is registered in NPPES with the primary taxonomy of Geriatric Medicine (Internal Medicine) 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 2009-07-16.