Quick answers
- Does Hrachya G. Grigoryan accept Medicare assignment?
- Yes. Medicare's clinician data says Hrachya G. Grigoryan 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.
- What is Hrachya G. Grigoryan's NPI number?
- 1093537789. 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 Hrachya G. Grigoryan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1513 S Grand Ave, Suite 360Los Angeles, CA 90015 (213) 246‑2422
- 1701 E Cesar Chavez Ave, Suite 535Los Angeles, CA 90033 (323) 284‑4077
Group practices
Medicare enrollment lists Hrachya G. Grigoryan as a member of this group (CMS data updated October 2, 2026).
- The Oncology Institute Ca, a Professional Corporation113 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Other clinicians in The Oncology Institute Ca, a Professional Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1093537789 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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