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

Dr. Karl M. Unkenholz, M.D.

Emergency Medicine Physician in Potsdam, NY · enumerated 2005.

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

National Provider Identifier

1215914429

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Registry record

Entity type Individual (Type 1)

Name Dr. Karl M. Unkenholz

Credential M.D.

Sex Male

Practice address Potsdam, NY, 13676

Phone (315) 265-3300

Fax (315) 261-6025

Enumeration date Dec 29, 2005

Last updated in NPPES Jan 7, 2025

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

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD14392 (HI) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License C53154 (CA) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 207725-1 (NY) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD2019-0916 (NM) 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
01801445	Medicaid	NY	-
686V11	Other	NY	BLUECROSS BLUESHIELD

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

Where does Karl Unkenholz practice?

The practice location on file with NPPES is in Potsdam, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Karl Unkenholz?

The National Provider Identifier (NPI) for Karl Unkenholz is 1215914429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Amit Shanker Clinical Cardiac Electrophysiology Physician · Potsdam, NY NPI 1598761801 Wayne Jackson Medical Physician Assistant · Potsdam, NY NPI 1750387023 Cynthia Baltazar Internal Medicine Physician · Potsdam, NY NPI 1790782548 Timothy Atkinson Family Medicine Physician · Potsdam, NY NPI 1346239308 Andrew Lafrance Family Nurse Practitioner · Potsdam, NY NPI 1578548988 Paul O'Donnell Optometrist · Potsdam, NY NPI 1396717955 Alexandru Stoian Cardiovascular Disease Physician · Potsdam, NY NPI 1538136114 Glauco Maresca Diagnostic Radiology Physician · Potsdam, NY NPI 1053370742

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-07.