DR. ALEX JAMES LINN M.D.
NPI 1003177338
Psychiatry & Neurology - Vascular Neurology in Sioux Falls, SD

Q: What is Alex Linn's NPI number?

The NPI number for Alex Linn is 1003177338. It was assigned to this individual provider in the NPPES registry on June 4, 2012.

Q: What is Alex Linn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Vascular Neurology, with taxonomy code 2084V0102X.

Q: When was this NPI record last updated?

The NPPES record for Alex Linn was last updated on May 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 04, 2012PECOS EnrolledAccepts Medicare Assignment

1301 S CLIFF AVE STE 610, SIOUX FALLS, SD 57105(605) 322-8860(605) 322-8868 Get Directions Write a Review

NPPES record last updated: May 6, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 6, 2026, May 24, 2019, Mar 7, 2019 and 3 more (6 updates tracked since 2016).

On this page

About Dr. Alex James Linn M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ALEX JAMES LINN M.D. (NPI 1003177338) is an individual vascular neurology provider in Sioux Falls, South Dakota, licensed in South Dakota (11423) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with Avera St Mary's Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1003177338

Entity TypeIndividualMale

Primary Taxonomy2084V0102X

Provider Legal NameDR. ALEX JAMES LINNCredential: M.D.

Location Address1301 S CLIFF AVE STE 610Sioux Falls, SD 57105

Mailing Address1301 S Cliff Ave Ste 610Sioux Falls, SD 57105-1032 · (605) 322-8860 · Fax (605) 322-8868

Phone(605) 322-8860

Fax(605) 322-8868

Sole ProprietorYes

Medical School CMSOtherGraduated 2011

Enumeration DateJune 4, 2012

Last NPPES UpdateMay 6, 20266 updates tracked since enumeration

NPPES CertifiedMay 6, 2026

✔ NPI 1003177338 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Vascular NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084V0102X

License✔ Licensed in SD · 11423

Definition

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.

Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License 11423 (SD)

1301 S CLIFF AVE STE 610, Sioux Falls, SD 57105

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Secondary Practice Locations 3

Location 1788 Service Rd Ste B-401East Lansing, MI 48824-7013 · Phone (517) 432-9277

Location 21215 E Michigan AveLansing, MI 48912-1811 · Phone (517) 432-9277 · Fax (517) 432-9414

Location 31325 S. Cliff Ave, Dept of Neuro-Endovascular SurgerySioux Falls, SD 57105-1032 · Phone (605) 332-8000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Ambetter Health of Delaware and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Alex James Linn M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID244453140

PECOS Enrollment IDI20190715001234

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alex Linn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Avera Mckennan

Same address

Neurological Surgery

1301 S. CLIFF AVE.
Sioux Falls, SD 57105

Reassigned Medicare billing, South Dakota enrollment
1,277 clinicians in this Medicare group

NPI 1114113693 (605) 322-8860

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 17

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist 36224

This procedure involves placing a small tube into your neck artery. It helps diagnose or treat certain conditions. A radiologist, a doctor specializing in medical imaging, reviews the process to ensure accuracy and safety.

65 services59 patients

Insertion of tube into brain artery for diagnosis or treatment with review by radiologist 36226

This procedure involves inserting a thin tube into a brain artery. It aids in diagnosing or treating brain conditions. A radiologist reviews the process to ensure accuracy and safety. It's a critical step in managing brain health effectively.

65 services60 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

60 services53 patients

Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist 36227

This procedure involves placing a small tube into an artery in your neck. This is done to diagnose or treat certain conditions. A radiologist, a doctor who specializes in medical imaging, will review the procedure to ensure everything is done correctly.

54 services51 patients

Review by radiologist of image for insertion of material to block blood flow 75894

This procedure involves a radiologist examining an image to plan the placement of a substance that will block blood flow in a specific area. This is usually done to prevent bleeding or to cut off the blood supply to a growth.

38 services27 patients

Imaging of blood vessel 75898

Imaging of blood vessels, also known as vascular imaging, is a non-invasive procedure that allows doctors to view the condition of your blood vessels. It employs techniques like ultrasound, CT scan, or MRI to capture images, enabling the detection of blockages or abnormalities.

37 services18 patients

Occlusion of central nervous system or spinal cord artery 61624

This procedure involves blocking a central nervous system or spinal cord artery to prevent blood flow. It's typically done to treat conditions like aneurysms or vascular malformations. It can help prevent strokes, bleeding, or other serious issues.

36 services25 patients

3d radiographic procedure with computerized image postprocessing 76377

A 3D radiographic procedure with computerized image postprocessing is a high-tech imaging test. It uses X-rays to create detailed 3D images of the body. The computerized postprocessing further enhances these images for more precise diagnosis and treatment planning.

34 services18 patients

Insertion of stent and blood clot protection device in neck artery with review by radiologist 37215

This procedure involves placing a small mesh tube, or stent, in your neck artery to ensure blood flow. A protective device is also inserted to prevent blood clots from reaching the brain. A radiologist reviews the procedure to ensure everything is in place correctly.

33 services31 patients

Insertion of tube into chest artery for diagnosis or treatment with review by radiologist 36225

This procedure involves placing a small tube into a chest artery. It helps diagnose or treat certain heart conditions. A radiologist, a doctor specialized in imaging techniques, will review the results to ensure accuracy and effectiveness.

32 services32 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

20 services20 patients

Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance 61645

This procedure involves removing a blood clot from a head artery. A special imaging technique called fluoroscopy is used for guidance. Additionally, an injection is given to help dissolve any remaining clot. This helps restore normal blood flow to the brain.

18 services18 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

18 services16 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

16 services16 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

14 services14 patients

Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist 36223

This procedure involves placing a tube into an artery in the brain. It's typically done for diagnostic purposes or treatment. A radiologist, a doctor specializing in imaging, reviews the process to ensure accuracy and safety.

13 services11 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

12 services12 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Avera St Mary's Hospital

Acute Care Hospitals · Pierre, SD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number430015

Location801 E SiouxPierre, SD 57501 · Hughes County

Emergency services Birthing friendly

Avera Mckennan Hospital & University Health Center

Acute Care Hospitals · Sioux Falls, SD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number430016

Location1325 S Cliff AveSioux Falls, SD 57117 · Minnehaha County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 57105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$126.78 typical visit price

range $55.52 – $167.23

Typical copayment $31.69 (range $13.88 – $41.80)

Most-billed visit code 99204

Established Patient

$97.88 typical visit price

range $18.08 – $137.08

Typical copayment $24.47 (range $4.52 – $34.27)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

REBECCA HANTEN CNP

Nurse Practitioner