Quick answers
- Which hospitals does John J. Casey Jr. work at?
- Medicare's official clinician data lists John J. Casey Jr. at 2 hospitals: Adventist Health Sonora and Doctors Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John J. Casey Jr. see patients?
- Medicare's clinician data lists 2 practice locations, including Modesto, CA. Call before your visit to confirm the address.
- What is John J. Casey Jr.'s specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does John J. Casey Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Casey Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John J. Casey Jr.?
- (209) 722-4842, as listed in official Medicare / NPI Registry data.
- What is John J. Casey Jr.'s NPI number?
- 1811909716. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John J. Casey Jr. works
Medicare's Facility Affiliation Data lists John J. Casey Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · CCN 050335
- Doctors Medical CenterModesto, CA · Acute Care Hospital · CCN 050464
Practice locations
Addresses where John J. Casey Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 1524 McHenry Ave, Suite 330Modesto, CA 95350 (209) 722‑4842
- 609 E Orangeburg Ave, Suite 201Modesto, CA 95350 (209) 572‑3224
Group practices
Medicare enrollment lists John J. Casey Jr. as a member of these groups (CMS data updated 2026-10-02).
- Golden Valley Health Centers113 clinicians in the group
- Stanislaus Orthopaedic and Sports Medicine Clinic9 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Modesto
Clinicians with the same Medicare primary specialty in Modesto, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1977 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811909716 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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