Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Peter Joseph Calkin, D.O.

Anesthesiology Physician in Stoughton, MA · enumerated 2007.

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

National Provider Identifier

1003025362

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Registry record

Entity type Individual (Type 1)

Name Peter Joseph Calkin

Credential D.O.

Sex Male

Practice address 907 Sumner St, Suite M201, Stoughton, MA, 02072

Phone (781) 344-2325

Fax (781) 341-8544

Enumeration date May 22, 2007

Last updated in NPPES Feb 22, 2012

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 204105 (MA) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 228536 (MA) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 5101019121 (MI) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
0550900704	Other	MI	BCBS
1003025362	Medicaid	MI	-
P00936959	Other	MI	RAILROAD MEDICARE

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 Peter Calkin?

Peter Calkin is registered in NPPES with the primary taxonomy of Anesthesiology 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 2012-02-22.