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Mark Albert Nelson, MD

Gastroenterology Physician in La Porte, IN · enumerated 2006.

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

National Provider Identifier

1891737763

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Registry record

Entity type Individual (Type 1)
Name Mark Albert Nelson
Credential MD
Sex Male
Practice address 900 I St Fl 2, La Porte, IN, 46350
Phone (219) 872-6566
Fax (219) 872-2712
Enumeration date Jun 12, 2006
Last updated in NPPES Oct 13, 2023

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 01040264A (IN) 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
100209820A Medicaid IN -

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 1891737763 active?
Yes, as of the latest NPPES snapshot, NPI 1891737763 is active (record last updated 2023-10-13).
How do I verify Mark Nelson's NPI record?
Cross-check NPI 1891737763 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 2023-10-13.