Alison R. Stewart, D.O.
Emergency Medicine Physician · Mission Hills, CA
Alison R. Stewart, D.O. is an emergency medicine physician with a practice address in Mission Hills, California, and NPI 1487735163, issued on Oct 18, 2006. Check the license (California 20A9947, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alison R. Stewart
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 20A9947 CA
036108148 IL
Self-reported in NPPES; status is on the state search - Practice location
- 11333 N Sepulveda Blvd, Mission Hills, CA 91345
- Phone
- (818) 869-7200
- Enumerated
- Oct 18, 2006
- Record last updated
- Mar 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20071207000611); 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 11333 N Sepulveda Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Artur Alaverdyan, M.D.Internal Medicine Physician1982135208
- Gilberto Bultron, M.D.Pediatrics Physician1972705259
- Yiling Chen, PAPhysician Assistant1215429733
- Danyl Fakhrutdinov, PA-CPhysician Assistant1699318014
- Paniz Heidari, D.O.Obstetrics & Gynecology Physician1821435637
- Robin Klein, D.O.Emergency Medicine Physician1538303292
Verify Alison R. Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9947Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average emergency medicine physician in 2024
236 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
- Ondansetron Odt28 claims
- Ibuprofen14 claims
- Cephalexin13 claims
- Nitrofurantoin Mono-Macro13 claims
- Tramadol Hcl13 claims
- Methylprednisolone12 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.
Industry payments in 2024: $117.24
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Gem Medical Group CorporationMonterey Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alison R. Stewart among 7,751 emergency medicine physician records in California
Alison R. Stewart, D.O. 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2000 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 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).
9 emergency medicine physician records list a practice address in Mission Hills
They are 9 of the 731 NPPES records with a practice address in Mission Hills, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Mission Hills → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Chance Anderson, MDMission Hills, CA 913451902325467
- Jay Brown, M.D.Mission Hills, CA 913451376556183
- Bruce Cummings, D.O.Mission Hills, CA 913451407869225
- Charles Deng, M.D.Mission Hills, CA 913451407869233
- Robin Klein, D.O.Mission Hills, CA 913451538303292
- Sammy Shon, MDMission Hills, CA 913451548215023
- Scott Wang, M.D.Mission Hills, CA 913451114930757
- Thomas Waskiewicz, M.D.Mission Hills, CA 913451497768030
Common questions
What is Alison R. Stewart, D.O.'s NPI number?
Alison R. Stewart, D.O.'s National Provider Identifier (NPI) is 1487735163, issued on Oct 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alison R. Stewart, D.O. located?
The NPPES record lists a practice address at 11333 N Sepulveda Blvd, Mission Hills, CA, 91345. Phone: (818) 869-7200. Providers update this record themselves, so call before visiting.
How can I verify Alison R. Stewart, D.O.'s license?
NPPES lists California license number 20A9947, 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 Alison R. Stewart, D.O. prescribe under Medicare Part D?
In 2024, Alison R. Stewart, D.O. had 236 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.