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Calvin T Ma, MD

Diagnostic Radiology Physician in Sacramento, CA · enumerated 2007.

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

National Provider Identifier

1467646026

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Registry record

Entity type Individual (Type 1)
Name Calvin T Ma
Credential MD
Sex Male
Practice address 3161 L St, Sacramento, CA, 95816
Phone (916) 646-8401
Fax (916) 736-5533
Enumeration date Aug 28, 2007
Last updated in NPPES Sep 14, 2018

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License A111193 (CA) Primary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 13480 (NV) Secondary
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
P00842443 Other NV RR MEDICARE
1467646026 Medicaid NV -

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

What specialty is Calvin Ma?
Calvin Ma is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-14.