Quick answers
- Does Paul J. Diesfeld accept Medicare assignment?
- Yes. Medicare's clinician data says Paul J. Diesfeld 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 Paul J. Diesfeld see?
- In 2024, CMS data shows 416 Original Medicare patients and 967 services for Paul J. Diesfeld. This counts Original Medicare only and measures volume, not quality.
- What is Paul J. Diesfeld's NPI number?
- 1396796041. 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 Paul J. Diesfeld, 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 | 416 |
|---|---|
| Services billed to Medicare | 967 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Aspiration and/or injection of fluid from large joint (20610)324 services
- X-ray of knee, 3 views (73562)290 services
- Replacement of knee joint, both sides of knee (27447)115 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)109 services
- New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more (99202)38 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 cholesterol75%
- Arthritis75%
- Diabetes29%
- Chronic kidney disease25%
- Ischemic heart disease21%
Hospitals where Paul J. Diesfeld works
Medicare's Facility Affiliation Data lists Paul J. Diesfeld 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.
- SSM Health Depaul Hospital St LouisBridgeton, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260104
Practice locations
Addresses where Paul J. Diesfeld is enrolled with Medicare (CMS data updated October 2, 2026).
- 1035 Bellevue Ave, Suite 500Saint Louis, MO 63117
- 12303 De Paul DrBridgeton, MO 63044 (314) 344‑6000
- 12349 De Paul Dr, Suite 100Bridgeton, MO 63044 (314) 291‑7900
Group practices
Medicare enrollment lists Paul J. Diesfeld as a member of this group (CMS data updated October 2, 2026).
- SSM Medical Group Inc568 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in SSM Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1996 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396796041 |
| 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