Quick answers
- Does Matthew A. Barker accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew A. Barker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Matthew A. Barker see?
- In 2024, CMS data shows 531 Original Medicare patients and 2,060 services for Matthew A. Barker. This counts Original Medicare only and measures volume, not quality.
- What is Matthew A. Barker's NPI number?
- 1588629570. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Matthew A. Barker, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 531 |
|---|---|
| Services billed to Medicare | 2,060 |
| Different services or procedures | 62 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)331 services
- Exam with injections of chemical for destruction of bladder using an endoscope (52287)223 services
- Exam of bladder and urethra for treatment of female urethral syndrome using an endoscope (52285)164 services
- Electronic assessment of bladder emptying (51741)134 services
- Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies (51729)133 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure72%
- High cholesterol69%
- Arthritis54%
- Osteoporosis33%
- Anxiety29%
- Depression28%
Hospitals where Matthew A. Barker works
Medicare's Facility Affiliation Data lists Matthew A. Barker at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Avera McKennan Hospital & University Health CenterSioux Falls, SD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 430016
- Avera Queen of PeaceMitchell, SD · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 431340
- Avera St LukesAberdeen, SD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 430014
- Osceola Community HospitalSibley, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161345
- Sioux Center HealthSioux Center, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161346
Practice locations
Addresses where Matthew A. Barker is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1001 E 21st St, Suite 401Sioux Falls, SD 57105 (605) 322‑8920
- 1325 S Cliff AveSioux Falls, SD 57105
- 1325 S Cliff Ave, RadiologySioux Falls, SD 57105 (605) 322‑4878
- 300 22nd AveBrookings, SD 57006
- 6100 S Louise AveSioux Falls, SD 57108
Group practices
Medicare enrollment lists Matthew A. Barker as a member of this group (CMS data updated October 2, 2026).
- Avera McKennan959 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Sioux Falls
Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.
Other clinicians in Avera McKennan
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Sanford School Of Medicine Of University Of South Dakota |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1588629570 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians