Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Kalchthaler, D.O.

Internal Medicine Physician in Yonkers, NY · enumerated 2005.

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

National Provider Identifier

1598765356

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Registry record

Entity type Individual (Type 1)

Name Thomas Kalchthaler

Credential D.O.

Sex Male

Practice address 69 S Broadway, Yonkers, NY, 10701

Phone (914) 376-5555

Fax (914) 964-1477

Enumeration date Jul 22, 2005

Last updated in NPPES Feb 20, 2008

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 123328 (NY) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 123328 (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
00736012	Medicaid	NY	-

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 specialty is Thomas Kalchthaler?

Thomas Kalchthaler is registered in NPPES with the primary taxonomy of Internal Medicine 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 2008-02-20.