Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Barbara K Estes, M.D.

Obstetrics & Gynecology Physician in Prince Frederick, MD · enumerated 2007.

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

National Provider Identifier

1508998816

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Registry record

Entity type Individual (Type 1)

Name Dr. Barbara K Estes

Credential M.D.

Sex Female

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

Phone (410) 414-4740

Fax (410) 414-4741

Enumeration date Mar 12, 2007

Last updated in NPPES Oct 9, 2025

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License D0051686 (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
366471	Other	-	MAMSI UNITED HEALTH CARE
6906-0003	Other	-	BLUE SHIELD DC
745446500	Medicaid	MD	-
2217681	Other	-	AETNA US HEALTHCARE
603792-03	Other	-	BLUE SHIELD OF MARYLAND

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 Barbara Estes?

The National Provider Identifier (NPI) for Barbara Estes is 1508998816, a Type 1 (individual) record in the CMS NPPES registry.

Where does Barbara Estes practice?

The practice location on file with NPPES is in Prince Frederick, 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 2025-10-09.