Gwendolyn Hooley, MD
NPI 1558865220 · Emergency Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gwendolyn Hooley, MD is a Emergency Medicine Physician provider in Los Angeles, CA (NPI 1558865220).
Provider details
- NPI number
- 1558865220
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A178792 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
28 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 16 | $177 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 12 | $122 |
Typical Medicare-allowed amounts for these services range $122–$177 (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.
Practice location
Mailing address
Additional practice locations (2)
- 4650 W Sunset BlvdLos Angeles, CA 90027-6062Phone: (323) 361-2109
- 1 Gustave L Levy PlNew York, NY 10029-6504Phone: (212) 824-8069
Registry dates
- Enumerated
- 2018-03-19
- Last updated
- 2024-07-01
- Certified
- 2024-07-01
Frequently asked questions
- What is Gwendolyn Hooley's NPI number?
- Gwendolyn Hooley's National Provider Identifier (NPI) is 1558865220, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gwendolyn Hooley's specialty?
- Gwendolyn Hooley is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gwendolyn Hooley located?
- Gwendolyn Hooley's practice location on file with NPPES is 757 Westwood Plz Ste 1517, Los Angeles, CA 90095-6062.
- What is Gwendolyn Hooley's phone number?
- The practice phone number listed in the NPPES registry for Gwendolyn Hooley is (310) 825-9111.
- Does Gwendolyn Hooley accept Medicare?
- Gwendolyn Hooley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gwendolyn Hooley's NPI active?
- Yes — Gwendolyn Hooley's NPI (1558865220) is active in the NPPES registry as of the last update on 2024-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.