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Collin R. Ohning

Retina Specialist (Ophthalmology) Physician in Greenbelt, MD · enumerated 2015.

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

National Provider Identifier

1992182794

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Registry record

Entity type Individual (Type 1)
Name Collin R. Ohning
Sex Male
Practice address 7501 Greenway Center Dr # 300, Greenbelt, MD, 20770
Phone (301) 474-4679
Fax (301) 474-7182
Enumeration date Apr 30, 2015
Last updated in NPPES Jan 8, 2020

Taxonomy & licenses

207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License MD046964 (DC) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License TRN22040 (FL) Secondary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD046964 (DC) Secondary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D0087357 (MD) Secondary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 0101266781 (VA) Secondary
207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License 0101266781 (VA) Secondary

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

What specialty is Collin Ohning?
Collin Ohning is registered in NPPES with the primary taxonomy of Retina Specialist (Ophthalmology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-08.