Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Francis Buettner, DO

Emergency Medicine Physician in Jefferson, IA · enumerated 2005.

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

National Provider Identifier

1861474421

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Francis Buettner

Credential DO

Sex Male

Practice address 1000 W Lincoln Way, Jefferson, IA, 50129

Phone (515) 386-2114

Enumeration date Nov 18, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 03231 (IA) Secondary

207PE0005X Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 03231 (IA) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License DO-03231 (IA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
36713	Other	-	BX
930097504	Other	IA	RR MC
0189134	Medicaid	IA	-
49896	Other	IA	BX

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 1861474421 active?

Yes, as of the latest NPPES snapshot, NPI 1861474421 is active (record last updated 2023-03-07).

How do I verify Mark Buettner's NPI record?

Cross-check NPI 1861474421 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 2023-03-07.