Quick answers
- Does Joseph R. Grim Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph R. Grim Jr. 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 Joseph R. Grim Jr. see?
- In 2024, CMS data shows 294 Original Medicare patients and 321 services for Joseph R. Grim Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Joseph R. Grim Jr.'s NPI number?
- 1609834167. 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 Joseph R. Grim Jr., 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 | 294 |
|---|---|
| Services billed to Medicare | 321 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Anesthesia for lens surgery (00142)86 services
- Anesthesia for nerve block and injection procedure, prone position (01992)70 services
- Anesthesia for nerve destruction procedures on spine or spinal cord of lower back accessed through skin using imaging guidance (01940)27 services
- Anesthesia for other procedure on skin, muscles, or nerves of head, neck, and upper back (00300)19 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)16 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%
- Arthritis59%
- Diabetes42%
- Ischemic heart disease31%
- Anxiety28%
Practice locations
Addresses where Joseph R. Grim Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1390 E Yosemite Ave, Suite BMerced, CA 95340 (209) 580‑3400
- 1700 Mount Vernon AveBakersfield, CA 93306 (661) 326‑2000
Group practices
Medicare enrollment lists Joseph R. Grim Jr. as a member of this group (CMS data updated October 2, 2026).
- Regional Anesthesia Associates Inc43 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Merced
Clinicians with the same Medicare primary specialty in Merced, CA — not a recommendation.
Other clinicians in Regional Anesthesia Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609834167 |
| 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
- 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