Quick answers
- Does Donald J. Grunz accept Medicare assignment?
- Yes. Medicare's clinician data says Donald J. Grunz 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 Donald J. Grunz see?
- In 2024, CMS data shows 2,397 Original Medicare patients and 3,018 services for Donald J. Grunz. This counts Original Medicare only and measures volume, not quality.
- What is Donald J. Grunz's NPI number?
- 1629031141. 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 Donald J. Grunz, 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 | 2,397 |
|---|---|
| Services billed to Medicare | 3,018 |
| Different services or procedures | 107 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- X-ray of chest, 1 view (71045)698 services
- X-ray of chest, 2 views (71046)201 services
- X-ray of abdomen, 1 view (74018)183 services
- Ct scan of abdomen and pelvis with contrast (74177)133 services
- X-ray of shoulder, minimum of 2 views (73030)118 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%
- Arthritis64%
- Ischemic heart disease43%
- Chronic kidney disease42%
- Anxiety39%
Hospitals where Donald J. Grunz works
Medicare's Facility Affiliation Data lists Donald J. Grunz 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 Ardmore, IncArdmore, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370047
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260023
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260052
Practice locations
Addresses where Donald J. Grunz is enrolled with Medicare (CMS data updated October 2, 2026).
- 615 S New Ballas RdSaint Louis, MO 63141 (314) 251‑6031
- 901 E 5th StWashington, MO 63090 (636) 239‑8250
Group practices
Medicare enrollment lists Donald J. Grunz as a member of this group (CMS data updated October 2, 2026).
- West County Radiological Group Inc102 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in West County Radiological Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629031141 |
| 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