Quick answers
- Which hospitals does William L. Papanickolas work at?
- Medicare's official clinician data lists William L. Papanickolas at 1 hospital: Doctors Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William L. Papanickolas see patients?
- Medicare's clinician data lists 2 practice locations, including Modesto, CA and Porterville, CA. Call before your visit to confirm the address.
- What is William L. Papanickolas's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does William L. Papanickolas accept Medicare assignment?
- Yes. Medicare's clinician data says William L. Papanickolas 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 William L. Papanickolas?
- (209) 578-1211, as listed in official Medicare / NPI Registry data.
- What is William L. Papanickolas's NPI number?
- 1811920937. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William L. Papanickolas works
Medicare's Facility Affiliation Data lists William L. Papanickolas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Doctors Medical CenterModesto, CA · Acute Care Hospital · CCN 050464
Practice locations
Addresses where William L. Papanickolas is enrolled with Medicare (CMS data updated 2026-10-02).
- 1441 Florida AveModesto, CA 95350 (209) 578‑1211
- 465 W Putnam AvePorterville, CA 93257 (559) 784‑1110
Group practices
Medicare enrollment lists William L. Papanickolas as a member of this group (CMS data updated 2026-10-02).
- Valley Regional Anesthesia Associates Inc146 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Modesto
Clinicians with the same Medicare primary specialty in Modesto, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811920937 |
| 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