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Nithin Karnan, MD

Internal Medicine Physician in Mason City, IA · enumerated 2025.

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

National Provider Identifier

1639069099

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Registry record

Entity type Individual (Type 1)
Name Nithin Karnan
Credential MD
Sex Male
Practice address 1010 4th St Sw, Suite 305, Mason City, IA, 50401
Phone (641) 428-5700
Enumeration date Jul 8, 2025
Last updated in NPPES Jul 8, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License R-13421 (IA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Nithin Karnan practice?
The practice location on file with NPPES is in Mason City, IA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Nithin Karnan?
The National Provider Identifier (NPI) for Nithin Karnan is 1639069099, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-08.