ALEX J. LINN M.D. – NPI #1003177338
Psychiatry & Neurology

Vascular Neurology is a subspecialty in the evaluation, prevention, treatment and recovery from vascular diseases of the nervous system. This subspecialty includes the diagnosis and treatment of vascular events of arterial or venous origin from a large number of causes that affect the brain or spinal cord such as ischemic stroke, intracranial hemorrhage, spinal cord ischemia and spinal cord hemorrhage.

Health Care Provider Taxonomy Code for Psychiatry & Neurology

ALEX LINN is a psychiatry & neurologist located in SIOUX FALLS, SD. NPPES has assigned the NPI number 1003177338 to ALEX LINN on June 04, 2012. It is a Type-1 NPI, indicating this NPI number is associated with an individual. According to the NPI Registry, there are 3 additional location(s) assigned to this provider which are listed below. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2084V0102X from the Health Care Provider Taxonomy code set, which is classified as Psychiatry & Neurology, specializing in Vascular Neurology

The NPI profile was last updated on May 06, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for ALEX LINN below.

NPI Profile for
ALEX J. LINN

NPI Number
1003177338
Enumeration Date

(more than 14 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
ALEX J. LINN
Credentials
M.D.
Primary location
1301 S CLIFF AVE STE 610
SIOUX FALLS, SD 57105
Phone: (605) 322-8860 Fax: (605) 322-8868
3 Other location(s):
788 Service Rd Ste B-401
East Lansing, MI 48824-7013
Phone: (517) 432-9277
1215 E Michigan Ave
Lansing, MI 48912-1811
Phone: (517) 432-9277
Fax: (517) 432-9414
1325 S. Cliff Ave
Dept of Neuro-Endovascular Surgery
Sioux Falls, SD 57105-1032
Phone: (605) 332-8000
Mailing address
Same as primary location
Sole Proprietor
Yes
Updated
Certification Date
May 06, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
2084V0102X
- Psychiatry & Neurology / Vascular Neurology (Primary)		 SD 11423
2084N0400X
- Psychiatry & Neurology / Neurology		 SD 11423

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
ALEX LINN is affiliated with the following medical group(s):
  • HOSPITAL
    • AVERA MCKENNAN HOSPITAL & UNIVERSITY HEALTH CENTER
      1325 S CLIFF AVE POST OFFICE BOX 5045
      SIOUX FALLS, SD 57117
    • AVERA ST MARY'S HOSPITAL
      801 E SIOUX
      PIERRE, SD 57501
    • SPENCER MUNICIPAL HOSPITAL
      1200 1ST AVENUE EAST
      SPENCER, IA 51301

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Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.