Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark R Katsaros, D.O.

Emergency Medicine Physician in Jefferson City, MO · enumerated 2006.

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

National Provider Identifier

1306894019

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark R Katsaros

Credential D.O.

Sex Male

Practice address 3527 W Truman Blvd, Jefferson City, MO, 65109

Phone (573) 882-8910

Fax (573) 884-1585

Enumeration date May 5, 2006

Last updated in NPPES May 29, 2024

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 114695 (MO) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 114695 (MO) Secondary

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

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

Is NPI 1306894019 active?

Yes, as of the latest NPPES snapshot, NPI 1306894019 is active (record last updated 2024-05-29).

How do I verify Mark Katsaros's NPI record?

Cross-check NPI 1306894019 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 2024-05-29.