Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Benjamin S Siegel, MD

Pediatrics Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1285625954

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Registry record

Entity type Individual (Type 1)

Name Benjamin S Siegel

Credential MD

Sex Male

Practice address 850 Harrison Ave, Yacc5, Boston, MA, 02118

Phone (617) 414-5946

Fax (617) 414-4541

Enumeration date Nov 2, 2005

Last updated in NPPES Jul 18, 2014

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 34599 (MA) Primary

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
110035351A	Medicaid	MA	-

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

What is the NPI number for Benjamin Siegel?

The National Provider Identifier (NPI) for Benjamin Siegel is 1285625954, a Type 1 (individual) record in the CMS NPPES registry.

Where does Benjamin Siegel practice?

The practice location on file with NPPES is in Boston, 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 2014-07-18.