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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Heather Katz, D.O.

Hematology & Oncology Physician in Sleepy Hollow, NY · enumerated 2015.

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

National Provider Identifier

1740670397

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Registry record

Entity type Individual (Type 1)
Name Dr. Heather Katz
Credential D.O.
Sex Female
Practice address 777 N Broadway Ste 102, Sleepy Hollow, NY, 10591
Phone (914) 366-1625
Fax (914) 366-1603
Enumeration date Feb 3, 2015
Last updated in NPPES Nov 6, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 54966 (CO) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 3122 (FL) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 297925-1 (NY) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
63006570 Medicaid CO -

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

Is NPI 1740670397 active?
Yes, as of the latest NPPES snapshot, NPI 1740670397 is active (record last updated 2019-11-06).
How do I verify Heather Katz's NPI record?
Cross-check NPI 1740670397 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 2019-11-06.