Quick answers
- Does Joseph R. Mejia accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph R. Mejia 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. Mejia see?
- In 2024, CMS data shows 208 Original Medicare patients and 15,215 services for Joseph R. Mejia. This counts Original Medicare only and measures volume, not quality.
- What is Joseph R. Mejia's NPI number?
- 1831362326. 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. Mejia, 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 | 208 |
|---|---|
| Services billed to Medicare | 15,215 |
| Different services or procedures | 71 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)11,320 services
- Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg (J7320)1,900 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)342 services
- Complete ultrasound scan of joint (76881)120 services
- Needle measurement of electrical activity in arm or leg muscles, complete study (95886)97 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%
- Diabetes34%
- Ischemic heart disease31%
- Anxiety26%
Practice locations
Addresses where Joseph R. Mejia is enrolled with Medicare (CMS data updated October 2, 2026).
- 459 Watchung AveWatchung, NJ 07069 (908) 756‑2424
Group practices
Medicare enrollment lists Joseph R. Mejia as a member of this group (CMS data updated October 2, 2026).
- Performance Medical of Watchung LLC23 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in New Jersey →
Other rehabilitation doctors in New Jersey
Clinicians with the same Medicare primary specialty in New Jersey — not a recommendation.
Other clinicians in Performance Medical of Watchung LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | West Virginia School Of Osteopathic Medicine |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831362326 |
| 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