Quick answers
- Does Aaron W. Bjorn accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron W. Bjorn 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 Aaron W. Bjorn see?
- In 2024, CMS data shows 151 Original Medicare patients and 2,211 services for Aaron W. Bjorn. This counts Original Medicare only and measures volume, not quality.
- What is Aaron W. Bjorn's NPI number?
- 1740281088. 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 Aaron W. Bjorn, 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 | 151 |
|---|---|
| Services billed to Medicare | 2,211 |
| Different services or procedures | 79 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)900 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)143 services
- Insertion of needle into vein for collection of blood sample (36415)139 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)118 services
- Blood test, comprehensive group of blood chemicals (80053)100 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 cholesterol72%
- High blood pressure61%
- Arthritis37%
- Depression28%
- Diabetes25%
- Anxiety24%
Hospitals where Aaron W. Bjorn works
Medicare's Facility Affiliation Data lists Aaron W. Bjorn 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.
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260077
Practice locations
Addresses where Aaron W. Bjorn is enrolled with Medicare (CMS data updated October 2, 2026).
- 13303 Tesson Ferry RdSaint Louis, MO 63128
- 1475 Kisker Rd, Suite 230Saint Charles, MO 63304 (636) 939‑5000
Group practices
Medicare enrollment lists Aaron W. Bjorn as a member of this group (CMS data updated October 2, 2026).
- American Multispecialty Group Inc116 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in American Multispecialty Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740281088 |
| 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