NPI Portal NPI Lookup & Verification

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

Dr. Michael Baruch Zack, MD

Pulmonary Disease Physician in Medford, MA · enumerated 2005.

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

National Provider Identifier

1457342198

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Registry record

Entity type Individual (Type 1)
Name Dr. Michael Baruch Zack
Credential MD
Sex Male
Practice address Medford, MA, 02155
Phone (781) 391-6318
Fax (781) 391-2709
Enumeration date Nov 2, 2005
Last updated in NPPES Mar 13, 2013

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

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 33803 (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
293909063 Other MA RAILROAD MEDICARE
21767 Other MA AETNA
4804295 Other MA UNITED HEALTH
0004629 Other MA NEIGHBORHOOD HEALTH
993560 Other MA NETWORK HEALTH
B10153001 Other MA CIGNA
23012 Other MA HARVARD PILGRIM
2050765 Medicaid MA -
40321 Other MA FALLON
708639 Other MA TUFTS

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.

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Frequently asked questions

What is the NPI number for Michael Zack?
The National Provider Identifier (NPI) for Michael Zack is 1457342198, a Type 1 (individual) record in the CMS NPPES registry.
Where does Michael Zack practice?
The practice location on file with NPPES is in Medford, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-13.