Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Henry Bresnahan, MD

Internal Medicine Physician in Reading, MA · enumerated 2006.

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

National Provider Identifier

1255405973

Verified

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Registry record

Entity type Individual (Type 1)

Name Michael Henry Bresnahan

Credential MD

Sex Male

Practice address 20 Pondmeadow Dr, Reading Internal Medicine Assoc Inc, Reading, MA, 01867

Phone (781) 944-0040

Fax (781) 944-1684

Enumeration date Nov 17, 2006

Last updated in NPPES Sep 23, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 55004 (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
3009173	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

Is NPI 1255405973 active?

Yes, as of the latest NPPES snapshot, NPI 1255405973 is active (record last updated 2013-09-23).

How do I verify Michael Bresnahan's NPI record?

Cross-check NPI 1255405973 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 2013-09-23.