Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Derek J Orton, MD

Orthopaedic Surgery Physician in Greenfield, WI · enumerated 2006.

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

National Provider Identifier

1790742724

Verified

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Registry record

Entity type Individual (Type 1)

Name Derek J Orton

Credential MD

Sex Male

Practice address 9000 W Sura Ln, Greenfield, WI, 53228

Phone (262) 329-2225

Enumeration date Apr 26, 2006

Last updated in NPPES Apr 1, 2024

Taxonomy & licenses

207XX0005X Sports Medicine (Orthopaedic Surgery) Physician Allopathic & Osteopathic Physicians · License 49025 (WI) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 49025 (WI) 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
34841100	Medicaid	WI	-
P01114676	Other	WI	RR MEDICARE

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

How do I verify Derek Orton's NPI record?

Cross-check NPI 1790742724 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790742724 active?

Yes, as of the latest NPPES snapshot, NPI 1790742724 is active (record last updated 2024-04-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-01.