Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Calvin H Peterson, PAC

Physician Assistant in Southbridge, MA · enumerated 2006.

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

National Provider Identifier

1508845421

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Registry record

Entity type Individual (Type 1)

Name Calvin H Peterson

Credential PAC

Sex Male

Practice address 100 South St, Southbridge, MA, 01550

Phone (508) 765-9771

Fax (508) 764-2448

Enumeration date Jan 10, 2006

Last updated in NPPES Dec 29, 2014

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C500000139 (DE) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA1146 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
000867643	Medicaid	DE	-

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

Is NPI 1508845421 active?

Yes, as of the latest NPPES snapshot, NPI 1508845421 is active (record last updated 2014-12-29).

How do I verify Calvin Peterson's NPI record?

Cross-check NPI 1508845421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-12-29.