Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory R Lochen, M.D.

Ophthalmology Physician in Waukesha, WI · enumerated 2006.

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

National Provider Identifier

1003873217

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Registry record

Entity type Individual (Type 1)

Name Gregory R Lochen

Credential M.D.

Sex Male

Practice address 1111 Delafield St, Suite 312, Waukesha, WI, 53188

Phone (262) 547-3352

Fax (262) 547-9142

Enumeration date May 1, 2006

Last updated in NPPES Sep 18, 2007

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians 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
103431	Other	WI	HEALTH ALLIANCE
30125200	Other	WI	MANAGED HEALTH SERVICES
0800072	Other	WI	UNITED HEALTHCARE
30125200	Other	WI	ABRI
30125200	Medicaid	WI	-
4016335	Other	WI	AETNA
747042	Other	WI	MOHAWK
822601	Other	WI	VIPA

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

Is NPI 1003873217 active?

Yes, as of the latest NPPES snapshot, NPI 1003873217 is active (record last updated 2007-09-18).

How do I verify Gregory Lochen's NPI record?

Cross-check NPI 1003873217 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 2007-09-18.