Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael Thomas Rosenbaum, M.D.

Dermatology Physician in Chelmsford, MA · enumerated 2005.

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

National Provider Identifier

1932193877

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Thomas Rosenbaum

Credential M.D.

Sex Male

Practice address Chelmsford, MA, 01824

Phone (978) 934-9294

Fax (978) 934-0056

Enumeration date Sep 7, 2005

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 44591 (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
0004655	Other	MA	NEIGHBORHOOD HEALTH PLAN
20335	Other	MA	FALLON HEALTH PAN
712126	Other	MA	TUFTS HEALTH PLAN
03-00030	Other	MA	UNITED HEALTH
4143	Other	MA	HARVARD PILGRIM

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

Is NPI 1932193877 active?

Yes, as of the latest NPPES snapshot, NPI 1932193877 is active (record last updated 2007-07-08).

How do I verify Michael Rosenbaum's NPI record?

Cross-check NPI 1932193877 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.