Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jeffrey I Lasker, MD

Pediatrics Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1851375596

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey I Lasker

Credential MD

Sex Male

Practice address 800 Washington St, Dept. of Pediatrics, Boston, MA, 02111

Phone (617) 636-5241

Enumeration date Dec 6, 2005

Last updated in NPPES Dec 6, 2011

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 39986 (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
2069601	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 specialty is Jeffrey Lasker?

Jeffrey Lasker is registered in NPPES with the primary taxonomy of Pediatrics 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 2011-12-06.