Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lauren Massingham, M.D.

Clinical Genetics (M.D.) Physician in Boston, MA · enumerated 2007.

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

National Provider Identifier

1417000357

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Registry record

Entity type Individual (Type 1)

Name Lauren Massingham

Credential M.D.

Sex Female

Practice address 300 Longwood Ave, Boston, MA, 02115

Phone (617) 355-6000

Enumeration date Jan 22, 2007

Last updated in NPPES Feb 21, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD14125 (RI) Secondary

207SG0201X Clinical Genetics (M.D.) Physician Allopathic & Osteopathic Physicians · License 239382 (MA) Primary

207SG0201X Clinical Genetics (M.D.) Physician Allopathic & Osteopathic Physicians · License MD14125 (RI) 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
MD14125	Other	RI	LICENSE

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

Where does Lauren Massingham practice?

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

What is the NPI number for Lauren Massingham?

The National Provider Identifier (NPI) for Lauren Massingham is 1417000357, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-21.