Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory D Osmundson, M.D.

Ophthalmology Physician in Sioux Falls, SD · enumerated 2006 · practices at Ophthalmology Ltd.

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

National Provider Identifier

1255391801

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory D Osmundson

Credential M.D.

Sex Male

Practice address 6601 S Minnesota Ave, Suite 200, Sioux Falls, SD, 57108

Phone (605) 336-6294

Fax (605) 336-0266

Enumeration date Mar 27, 2006

Last updated in NPPES Jun 11, 2026

Taxonomy & licenses

207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License 4573 (SD) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 4573 (SD) 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
123714	Other	MN	UCARE MN
137323400	Medicaid	MN	-
HP76197	Other	-	HEALTHPARTNERS
46031185613	Other	NE	NE MEDICAID
0524207	Medicaid	IA	-
6301490	Medicaid	SD	-
663S4OS	Other	MN	MNBS NON
6238	Other	SD	SD WELLMARK
4573	Other	SD	DAKOTACARE
06F30OS	Other	MN	MN BLUE SHIELD
25529	Other	IA	WELLMARK OF IA

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

Where does Gregory Osmundson practice?

The practice location on file with NPPES is in Sioux Falls, SD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Gregory Osmundson?

The National Provider Identifier (NPI) for Gregory Osmundson is 1255391801, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-11.