Quick answers
- Which hospitals does Maria S. Granthom work at?
- Medicare's official clinician data lists Maria S. Granthom at 1 hospital: Watsonville Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Maria S. Granthom see patients?
- Medicare's clinician data lists 3 practice locations, including Watsonville, CA, Salinas, CA and La Mesa, CA. Call before your visit to confirm the address.
- What is Maria S. Granthom's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Maria S. Granthom accept Medicare assignment?
- Medicare's clinician data says Maria S. Granthom 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 Maria S. Granthom?
- (831) 728-8250, as listed in official Medicare / NPI Registry data.
- What is Maria S. Granthom's NPI number?
- 1679750327. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Maria S. Granthom works
Medicare's Facility Affiliation Data lists Maria S. Granthom at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Watsonville Community HospitalWatsonville, CA · Acute Care Hospital · CCN 050194
Practice locations
Addresses where Maria S. Granthom is enrolled with Medicare (CMS data updated 2026-10-02).
- 204 E Beach StWatsonville, CA 95076 (831) 728‑8250
- 450 E Romie LnSalinas, CA 93901
- 5555 Grossmont Ctr DrLa Mesa, CA 91942 (619) 740‑6000
Group practices
Medicare enrollment lists Maria S. Granthom as a member of these groups (CMS data updated 2026-10-02).
- Obhg California PC94 clinicians in the group
- Salud Para la Gente41 clinicians in the group
- Obstetrix Medical Group of California a Professional Corporation15 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Watsonville
Clinicians with the same Medicare primary specialty in Watsonville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1969 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1679750327 |
| 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