Quick answers
- Where does Mariel A. Ross see patients?
- Medicare's clinician data lists 1 practice location in Sylmar, CA. Call before your visit to confirm the address.
- What is Mariel A. Ross's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Mariel A. Ross accept Medicare assignment?
- Yes. Medicare's clinician data says Mariel A. Ross 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 Mariel A. Ross?
- (877) 608-0044, as listed in official Medicare / NPI Registry data.
- What is Mariel A. Ross's NPI number?
- 1417404450. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mariel A. Ross is enrolled with Medicare (CMS data updated 2026-10-02).
- 12669 Encinitas AveSylmar, CA 91342 (877) 608‑0044
Group practices
Medicare enrollment lists Mariel A. Ross as a member of this group (CMS data updated 2026-10-02).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Sylmar
Clinicians with the same Medicare primary specialty in Sylmar, CA — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417404450 |
| 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
- 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