Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Mazzei, M.D.

Surgical Critical Care Physician in Allentown, PA · enumerated 2014.

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

National Provider Identifier

1255743381

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Mazzei

Credential M.D.

Sex Male

Practice address 1240 S Cedar Crest Blvd Ste 308, Allentown, PA, 18103

Phone (610) 402-1350

Enumeration date May 23, 2014

Last updated in NPPES Mar 4, 2024

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD478624 (PA) Secondary

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License MD478624 (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Michael Mazzei practice?

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

What is the NPI number for Michael Mazzei?

The National Provider Identifier (NPI) for Michael Mazzei is 1255743381, 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 2024-03-04.