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Holly S Mason, M.D.

Surgery Physician in Springfield, MA · enumerated 2006.

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

National Provider Identifier

1033201462

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Registry record

Entity type Individual (Type 1)
Name Holly S Mason
Credential M.D.
Sex Female
Practice address 100 Wason Avenue, Springfield, MA, 01107
Phone (413) 794-5265
Fax (413) 794-1794
Enumeration date Sep 30, 2006
Last updated in NPPES Jan 18, 2018

Taxonomy & licenses

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License 213644 (MA) Secondary
208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 213644 (MA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 is the NPI number for Holly Mason?
The National Provider Identifier (NPI) for Holly Mason is 1033201462, a Type 1 (individual) record in the CMS NPPES registry.
Where does Holly Mason practice?
The practice location on file with NPPES is in Springfield, MA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-18.