Quick answers
- Does William R. Barker accept Medicare assignment?
- Yes. Medicare's clinician data says William R. 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 William R. Barker see?
- In 2024, CMS data shows 280 Original Medicare patients and 1,009 services for William R. Barker. This counts Original Medicare only and measures volume, not quality.
- What is William R. Barker's NPI number?
- 1396927364. 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 William R. 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 | 280 |
|---|---|
| Services billed to Medicare | 1,009 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)201 services
- Anticoagulant management of patient taking warfarin (93793)196 services
- Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)146 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)124 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)77 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 pressure75%
- High cholesterol73%
- Diabetes44%
- Arthritis39%
- Chronic kidney disease34%
- Ischemic heart disease27%
Hospitals where William R. Barker works
Medicare's Facility Affiliation Data lists William R. 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.
- Abbott Northwestern HospitalMinneapolis, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240057
- Allina United HospitalSaint Paul, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240038
- Geisinger Wyoming Valley Medical CenterWilkes-Barre, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390270
Practice locations
Addresses where William R. Barker is enrolled with Medicare (CMS data updated October 2, 2026).
- 233 Grand AveSaint Paul, MN 55102 (651) 241‑5200
Group practices
Medicare enrollment lists William R. Barker as a member of this group (CMS data updated October 2, 2026).
- Allina Health System3,842 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Saint Paul
Clinicians with the same Medicare primary specialty in Saint Paul, MN — not a recommendation.
Other clinicians in Allina Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 2006 (20 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) | 1396927364 |
| 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