NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. James Dale Massa Jr., M.S.

Genetic Counselor (M.S.) in Clovis, CA · enumerated 2007 · practices at Kaiser Foundation Health Plan Inc.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1194920413

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Registry record

Entity type Individual (Type 1)
Name Mr. James Dale Massa Jr.
Credential M.S.
Sex Male
Practice address Clovis, CA, 93611
Phone (559) 324-4738
Enumeration date Jun 18, 2007
Last updated in NPPES Jul 8, 2007

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

170300000X Genetic Counselor (M.S.) Other Service Providers Primary

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

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.
What specialty is James Massa?
James Massa is registered in NPPES with the primary taxonomy of Genetic Counselor (M.S.). The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.