NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Jason Jahn, O.D.

Optometrist in Brookings, SD · enumerated 2005 · practices at Tasha J. Jones, O.D. P.C.

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

National Provider Identifier

1609861608

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Jason Jahn
Credential O.D.
Sex Male
Practice address Brookings, SD, 57006
Phone (605) 692-2020
Fax (605) 692-9594
Enumeration date Sep 15, 2005
Last updated in NPPES Feb 17, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 142 (SD) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
22104 Other SD SIOUX VALLEY HEALTH
0073102 Other SD BCBS OF SD
4C035JA Other MN BCBS OF MN
P00815934 Other SD RAILROAD MEDICARE
9280170 Medicaid SD -
419 Other SD DAKOTA CARE

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

What specialty is Jason Jahn?
Jason Jahn is registered in NPPES with the primary taxonomy of Optometrist. 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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-17.