Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ellsworth J Stay, MD

Anatomic Pathology & Clinical Pathology Physician in Arlington, VA · enumerated 2006.

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

National Provider Identifier

1083647531

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Registry record

Entity type Individual (Type 1)

Name Dr. Ellsworth J Stay

Credential MD

Sex Male

Practice address 1625 N George Mason Dr, Pathology Dept, Arlington, VA, 22205

Phone (703) 558-6541

Fax (502) 456-4440

Enumeration date Jul 8, 2006

Last updated in NPPES Sep 12, 2011

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 0101-029766 (VA) 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
339836	Other	-	OPTIMUM CHOICE
490050CC62678	Other	-	SECTION 1011 MEDICARE
96-2465316	Other	DC	WORKERS COMP DC
006601782	Medicaid	VA	-
220017496	Other	-	RAILROAD MEDICARE
240523	Other	VA	ANTHEM BLUE CROSS BS
339836	Other	-	MDIPA
16699	Other	-	GEORGE WASHINGTON UNIV
033007700	Medicaid	DC	-
1305167	Other	-	UNITED MINE WORKERS
339836	Other	-	MAMSI
506849	Other	-	NATIONAL CAPITAL PPO
879500200	Medicaid	MD	-
1022-0004	Other	DC	CAREFIRST BLUE CROSS DC
11-00210	Other	-	UNITED HEALTHCARE

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 Ellsworth Stay practice?

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

What is the NPI number for Ellsworth Stay?

The National Provider Identifier (NPI) for Ellsworth Stay is 1083647531, 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 2011-09-12.