Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Plutarco E Castellanos, MD

Pulmonary Disease Physician in Leominster, MA · enumerated 2005.

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

National Provider Identifier

1669463303

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Registry record

Entity type Individual (Type 1)

Name Plutarco E Castellanos

Credential MD

Sex Male

Practice address 50 Memorial Drive, Suite 113, Leominster, MA, 01453

Phone (978) 466-2692

Fax (978) 466-4754

Enumeration date Nov 2, 2005

Last updated in NPPES Oct 6, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 211208 (MA) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 211028 (MA) Primary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 211028 (MA) Secondary

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 211028 (MA) 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
0167801	Medicaid	MA	-
M20928	Other	-	GROUP MEDICAL

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

Where does Plutarco Castellanos practice?

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

What is the NPI number for Plutarco Castellanos?

The National Provider Identifier (NPI) for Plutarco Castellanos is 1669463303, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-06.