NPI Portal NPI Lookup & Verification

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

Dr. Mary Kay Barton, MD

Medical Oncology Physician in Purchase, NY · enumerated 2008.

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

National Provider Identifier

1477717882

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Registry record

Entity type Individual (Type 1)
Name Dr. Mary Kay Barton
Credential MD
Sex Female
Practice address Purchase, NY, 10577
Phone (914) 701-0001
Enumeration date Jul 15, 2008
Last updated in NPPES May 14, 2010

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

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 191758 (NY) 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.

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Frequently asked questions

What is the NPI number for Mary Barton?
The National Provider Identifier (NPI) for Mary Barton is 1477717882, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Barton practice?
The practice location on file with NPPES is in Purchase, NY. 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 2010-05-14.