Quick answers
- Does John S. Cross Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Cross Iii 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 John S. Cross Iii see?
- In 2024, CMS data shows 168 Original Medicare patients and 172 services for John S. Cross Iii. This counts Original Medicare only and measures volume, not quality.
- What is John S. Cross Iii's NPI number?
- 1538181755. 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 John S. Cross Iii, 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 | 168 |
|---|---|
| Services billed to Medicare | 172 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)33 services
- Anesthesia for exam of colon using an endoscope (00812)30 services
- Anesthesia for lens surgery (00142)28 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)21 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)15 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 cholesterol75%
- High blood pressure70%
- Arthritis45%
- Diabetes36%
- Ischemic heart disease33%
- Depression24%
Hospitals where John S. Cross Iii works
Medicare's Facility Affiliation Data lists John S. Cross Iii 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.
- Providence St. Joseph HospitalOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050069
- Westchester Medical CenterValhalla, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330234
Practice locations
Addresses where John S. Cross Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Woods RdValhalla, NY 10595
- 1100 W Stewart DrOrange, CA 92868 (714) 744‑8700
- 1798 N Garey AvePomona, CA 91767 (909) 865‑9500
Group practices
Medicare enrollment lists John S. Cross Iii as a member of these groups (CMS data updated October 2, 2026).
- Westchester Medical Center Advanced Physician Services PC897 clinicians in the group
- Allied Anesthesia Medical Group Inc191 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Valhalla
Clinicians with the same Medicare primary specialty in Valhalla, NY — not a recommendation.
Other clinicians in Westchester Medical Center Advanced Physician Services PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Columbia School Of Medicine |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538181755 |
| 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