Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Irvin V Ma, MD

Q: What is the NPI number for Irvin Ma?

The National Provider Identifier (NPI) for Irvin Ma is 1487233201, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Santa Clara, CA · enumerated 2021 · practices at Sutter Bay Medical Foundation.

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

National Provider Identifier

1487233201

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Registry record

Entity type Individual (Type 1)

Name Irvin V Ma

Credential MD

Sex Male

Practice address 2441 Mission College Blvd, Santa Clara, CA, 95054

Phone (408) 702-6668

Enumeration date Apr 7, 2021

Last updated in NPPES Oct 22, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A196566 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Irvin Ma practice?

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

What is the NPI number for Irvin Ma?

The National Provider Identifier (NPI) for Irvin Ma is 1487233201, 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 2025-10-22.