Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Dorian R Matzen, D.O.

Emergency Medicine Physician in Amarillo, TX · enumerated 2013.

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

National Provider Identifier

1811337439

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Registry record

Entity type Individual (Type 1)

Name Mr. Dorian R Matzen

Credential D.O.

Sex Male

Practice address 4510 Bell St, Amarillo, TX, 79109

Phone (806) 212-4835

Fax (806) 212-0900

Enumeration date Jun 27, 2013

Last updated in NPPES Oct 5, 2023

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License Q9436 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 04927 (KY) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 04927 (KY) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 04927 (KY) 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
360140301	Medicaid	TX	-

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 1811337439 active?

Yes, as of the latest NPPES snapshot, NPI 1811337439 is active (record last updated 2023-10-05).

How do I verify Dorian Matzen's NPI record?

Cross-check NPI 1811337439 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Jorge Sifuentes Family Medicine Physician · Amarillo, TX NPI 1841297421 Michael Flores Family Medicine Physician · Amarillo, TX NPI 1871591909 Meenakshi Dieguez Family Medicine Physician · Amarillo, TX NPI 1952573909 Bsa Physicians Group Inc Urgent Care Clinic/Center · Amarillo, TX NPI 1467619965 Bernhard Tagwerker Family Medicine Physician · Amarillo, TX NPI 1316101413 Thomas Mercado Emergency Medicine Physician · Amarillo, TX NPI 1750519286 Timothy Bixenman Family Nurse Practitioner · Amarillo, TX NPI 1881999340 Bsa Physicians Group Inc Family Medicine Physician · Amarillo, TX NPI 1144668765

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-05.