Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Y Oh, MD

Q: What is the NPI number for Michael Oh?

The National Provider Identifier (NPI) for Michael Oh is 1275508525, a Type 1 (individual) record in the CMS NPPES registry.

Neurological Surgery Physician in Orange, CA · enumerated 2006.

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

National Provider Identifier

1275508525

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Y Oh

Credential MD

Sex Male

Practice address 101 the City Dr S Bldg 30, Orange, CA, 92868

Phone (714) 456-6966

Fax (714) 456-8212

Enumeration date Feb 21, 2006

Last updated in NPPES Mar 21, 2023

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License MD426457 (PA) Secondary

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License C156484 (CA) 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
2605774	Medicaid	OH	-
101300739	Medicaid	PA	-
3810003619	Medicaid	WV	-

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 Michael Oh practice?

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

What is the NPI number for Michael Oh?

The National Provider Identifier (NPI) for Michael Oh is 1275508525, a Type 1 (individual) record in the CMS NPPES registry.

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James Pearle Pulmonary Disease Physician · Orange, CA NPI 1982783940 Uttam Reddy Nephrology Physician · Orange, CA NPI 1487846481 Ekamol Tantisattamo Nephrology Physician · Orange, CA NPI 1104053024 Ahmed Mohyeldin Neurological Surgery Physician · Orange, CA NPI 1912213687 Irene Tsai Diagnostic Radiology Physician · Orange, CA NPI 1447558044 Ian Chang Rheumatology Physician · Orange, CA NPI 1407116411 Julia Liang Nurse Practitioner · Orange, CA NPI 1679917686 Ismail Kasimoglu Endocrinology, Diabetes & Metabolism Physician · Orange, CA NPI 1578095774

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-21.