Quick answers
- Which hospitals does Cynthia J. Williams work at?
- Medicare's official clinician data lists Cynthia J. Williams at 2 hospitals: Oroville Hospital and Sierra Nevada Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Cynthia J. Williams see patients?
- Medicare's clinician data lists 3 practice locations, including Rancho Cordova, CA, Mariposa, CA and Orangevale, CA. Call before your visit to confirm the address.
- What is Cynthia J. Williams's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Cynthia J. Williams accept Medicare assignment?
- Medicare's clinician data says Cynthia J. Williams may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Cynthia J. Williams?
- (916) 790-3980, as listed in official Medicare / NPI Registry data.
- What is Cynthia J. Williams's NPI number?
- 1831726694. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Cynthia J. Williams works
Medicare's Facility Affiliation Data lists Cynthia J. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Oroville HospitalOroville, CA · Acute Care Hospital · CCN 050030
- Sierra Nevada Memorial HospitalGrass Valley, CA · Acute Care Hospital · CCN 050150
Practice locations
Addresses where Cynthia J. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 4040 Sunrise Blvd, Suite 130Rancho Cordova, CA 95742 (916) 790‑3980
- 5320 Hwy 49 N, Suite 1 3Mariposa, CA 95338 (209) 966‑2344
- 9490 Madison Ave, Suite 100Orangevale, CA 95662 (916) 549‑3973
Group practices
Medicare enrollment lists Cynthia J. Williams as a member of these groups (CMS data updated 2026-10-02).
- Community Health Centers of America117 clinicians in the group
- American River Urgent Care Inc6 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Rancho Cordova
Clinicians with the same Medicare primary specialty in Rancho Cordova, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1831726694 |
| 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