Natalya Ruben Grigoryan, MD
Emergency Medicine Physician · West Hills, CA
Natalya Ruben Grigoryan, MD is an emergency medicine physician with a practice address in West Hills, California, and NPI 1811485394, issued on Apr 30, 2018. Check the license (California A174112, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Natalya Ruben Grigoryan
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A174112 CA
MD-54985 IA
Self-reported in NPPES; status is on the state search - Practice location
- 7300 Medical Center Dr, West Hills, CA 91307
- Phone
- (818) 676-4000
- Enumerated
- Apr 30, 2018
- Record last updated
- Jul 2, 2025
- Medicare enrollment
- Enrolled (PECOS I20250709002207); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 7300 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stuart Ackerman, M.D.Anesthesiology Physician1942384250
- Edward Agazaryan, OTR/LOccupational Therapist1851819577
- Roofan Alsayegh, MDHospitalist Physician1477841641
- Neelam Amin, M.D.Anatomic Pathology & Clinical Pathology Physician1215956826
- Karen Arnold, P.A.Physician Assistant1407886070
- Eileen Bastian, M.D.Emergency Medicine Physician1861439267
Verify Natalya Ruben Grigoryan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A174112Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average emergency medicine physician in 2024
219 Medicare Part D claims for 126 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Cephalexin28 claims
- Prednisone21 claims
- Ondansetron Odt19 claims
- Hydrocodone-Acetaminophen18 claims
- Azithromycin12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 4 group practices
- California Mobile Medical Group IncGlendale, CA
- Emergency Services OF Iowa LLCOttumwa, IA
- Mobile Medical Group Inc.Glendale, CA
- Southeastern Emergency Physicians LLCRussellville, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Natalya Ruben Grigoryan among 7,751 emergency medicine physician records in California
Natalya Ruben Grigoryan, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 81% of them.
- NPI issued2018 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 emergency medicine physician records list a practice address in West Hills
They are 38 of the 708 NPPES records with a practice address in West Hills, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in West Hills → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Eileen Bastian, M.D.West Hills, CA 913071861439267
- Loren Caira, M.D.West Hills, CA 913071063459469
- Cameo Cozart-Chance, M.D.West Hills, CA 913071619903135
- Hrak Derderian, M.D.West Hills, CA 913071619034725
- Derek Golden, M.D.West Hills, CA 913071710146204
- Michael Jones, M.D.West Hills, CA 913071750323762
- Shahrokh KohanimWest Hills, CA 913071801841812
- Alan Kuban, M.D.West Hills, CA 913071124065917
Common questions
What is Natalya Ruben Grigoryan, MD's NPI number?
Natalya Ruben Grigoryan, MD's National Provider Identifier (NPI) is 1811485394, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Natalya Ruben Grigoryan, MD located?
The NPPES record lists a practice address at 7300 Medical Center Dr, West Hills, CA, 91307. Phone: (818) 676-4000. Providers update this record themselves, so call before visiting.
How can I verify Natalya Ruben Grigoryan, MD's license?
NPPES lists California license number A174112, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Natalya Ruben Grigoryan, MD prescribe under Medicare Part D?
In 2024, Natalya Ruben Grigoryan, MD had 219 Medicare Part D claims for 126 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.