Alison Stewart, D.O.
NPI 1487735163 · Emergency Medicine Physician · Mission Hills, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alison Stewart, D.O. is a Emergency Medicine Physician provider in Mission Hills, CA (NPI 1487735163).
Provider details
- NPI number
- 1487735163
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A9947 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
537 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 202 | $8 |
| Critical Care, First 30-74 Minutes99291 | 183 | $217 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 81 | $175 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician Only93042 | 46 | $7 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 25 | $118 |
Typical Medicare-allowed amounts for these services range $7–$217 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 28 | 28 |
| Ibuprofen | 14 | 14 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 13 | 13 |
| Cephalexin | 13 | 13 |
| Tramadol Hcl | 13 | 13 |
| Methylprednisolone | 12 | 12 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-18
- Last updated
- 2022-03-07
- Certified
- 2022-03-07
Frequently asked questions
- What is Alison Stewart's NPI number?
- Alison Stewart's National Provider Identifier (NPI) is 1487735163, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alison Stewart's specialty?
- Alison Stewart is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alison Stewart located?
- Alison Stewart's practice location on file with NPPES is 11333 N Sepulveda Blvd, Mission Hills, CA 91345-1116.
- What is Alison Stewart's phone number?
- The practice phone number listed in the NPPES registry for Alison Stewart is (818) 869-7200.
- Does Alison Stewart accept Medicare?
- Alison Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alison Stewart's NPI active?
- Yes — Alison Stewart's NPI (1487735163) is active in the NPPES registry as of the last update on 2022-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.