Alex Linn, M.D.
NPI 1003177338 · Vascular Neurology Physician · Sioux Falls, SD
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex Linn, M.D. is a Vascular Neurology Physician provider in Sioux Falls, SD (NPI 1003177338).
Provider details
- NPI number
- 1003177338
- Entity type
- Individual
- Primary specialty
- Vascular Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 11423 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
565 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Tube Into Internal Neck Artery for Diagnosis Or Treatment With Review By Radiologist36224 | 65 | $277 |
| Insertion of Tube Into Brain Artery for Diagnosis Or Treatment With Review By Radiologist36226 | 65 | $191 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 60 | $13 |
| Insertion of Tube Into External Neck Artery for Diagnosis Or Treatment With Review By Radiologist36227 | 54 | $140 |
| Review By Radiologist of Image for Insertion of Material to Block Blood Flow75894 | 38 | $63 |
| Imaging of Blood Vessel75898 | 37 | $80 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$94 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 788 Service Rd Ste B-401East Lansing, MI 48824-7013Phone: (517) 432-9277
- 1215 E Michigan AveLansing, MI 48912-1811Phone: (517) 432-9277Fax: (517) 432-9414
- 1325 S. Cliff AveDept of Neuro-Endovascular SurgerySioux Falls, SD 57105-1032Phone: (605) 332-8000
Registry dates
- Enumerated
- 2012-06-04
- Last updated
- 2026-05-06
- Certified
- 2026-05-06
Frequently asked questions
- What is Alex Linn's NPI number?
- Alex Linn's National Provider Identifier (NPI) is 1003177338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex Linn's specialty?
- Alex Linn is listed in the NPPES registry with a primary specialty of Vascular Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Alex Linn located?
- Alex Linn's practice location on file with NPPES is 1301 S Cliff Ave Ste 610, Sioux Falls, SD 57105.
- What is Alex Linn's phone number?
- The practice phone number listed in the NPPES registry for Alex Linn is (605) 322-8860.
- Does Alex Linn accept Medicare?
- Alex Linn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex Linn's NPI active?
- Yes — Alex Linn's NPI (1003177338) is active in the NPPES registry as of the last update on 2026-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.