Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Y Oh, M.D.

Q: What is the NPI number for William Oh?

The National Provider Identifier (NPI) for William Oh is 1770586117, a Type 1 (individual) record in the CMS NPPES registry.

Orthopaedic Surgery Physician in Tamuning, GU · enumerated 2005.

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

National Provider Identifier

1770586117

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Registry record

Entity type Individual (Type 1)

Name William Y Oh

Credential M.D.

Sex Male

Practice address 388 Ypao Rd, Tamuning, GU, 96913

Phone (671) 646-8881

Fax (671) 646-1292

Enumeration date May 31, 2005

Last updated in NPPES Apr 25, 2023

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 17710 (KY) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 80045 (OH) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 4301106667 (MI) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 01079317A (IN) Secondary

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 0101035843 (VA) Secondary

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 80045 (OH) Secondary

207XX0801X Orthopaedic Trauma Physician Allopathic & Osteopathic Physicians · License 80045 (OH) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License M-2293 (GU) 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
7100187290	Medicaid	KY	-
P39740027	Other	MI	MEDICARE PTAN
50035861	Other	KY	PASSPORT MEDICAID
81381	Other	KY	COVENTRYCARES
006409458	Medicaid	VA	-
H122863	Other	GU	MEDICARE PTAN

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 William Oh practice?

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

What is the NPI number for William Oh?

The National Provider Identifier (NPI) for William Oh is 1770586117, 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 2023-04-25.