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Jaroslaw Mateuszczyk, M.D.

Critical Care Medicine (Internal Medicine) Physician in Sioux Falls, SD · enumerated 2006.

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

National Provider Identifier

1003997230

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Registry record

Entity type Individual (Type 1)
Name Jaroslaw Mateuszczyk
Credential M.D.
Sex Male
Practice address 1205 S Grange Ave Ste 201, Sioux Falls, SD, 57105
Phone (605) 328-8188
Enumeration date Oct 17, 2006
Last updated in NPPES Jul 11, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 4301082045 (MI) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 11196 (ND) Secondary
207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 11196 (ND) 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
1458922 Medicaid ND -
10503 Medicaid ND -

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 Jaroslaw Mateuszczyk?
Jaroslaw Mateuszczyk is registered in NPPES with the primary taxonomy of Critical Care Medicine (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 2022-07-11.