Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mack Lee Sullivan, M.D.

Physical Medicine & Rehabilitation Physician in Eastchester, NY · enumerated 2006.

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

National Provider Identifier

1881616068

Verified

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Registry record

Entity type Individual (Type 1)

Name Mack Lee Sullivan

Credential M.D.

Sex Male

Practice address 369 White Plains Rd, Eastchester, NY, 10709

Phone (914) 395-3691

Fax (914) 395-3693

Enumeration date Jul 24, 2006

Last updated in NPPES Jan 1, 2026

Taxonomy & licenses

207QG0300X Geriatric Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 203477 (NY) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 203477 (NY) Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 203477 (NY) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 203477-1 (NY) Secondary

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
5C5609	Other	NY	HEALTHNET

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 Mack Sullivan?

Mack Sullivan is registered in NPPES with the primary taxonomy of Physical Medicine & Rehabilitation 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 2026-01-01.