William Green, M.D.
NPI 1891758686 · Emergency Medical Services (Emergency Medicine) Physician · Newport Beach, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Green, M.D. is a Emergency Medical Services (Emergency Medicine) Physician provider in Newport Beach, CA (NPI 1891758686).
Provider details
- NPI number
- 1891758686
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G70480 (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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,143 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 | 484 | $184 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 254 | $9 |
| Critical Care, First 30-74 Minutes99291 | 126 | $227 |
| Ultrasound of Heart, Follow-Up93308 | 121 | $27 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 69 | $126 |
| Ultrasound Scan of Chest76604 | 63 | $29 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 28 | 28 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 16 | 16 |
| Prednisone | 15 | 15 |
| Azithromycin | 14 | 14 |
| Ondansetronbrand: Ondansetron Odt | 13 | 13 |
| Celecoxib | 12 | 12 |
| Cephalexin | 12 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-11
- Last updated
- 2010-08-23
Frequently asked questions
- What is William Green's NPI number?
- William Green's National Provider Identifier (NPI) is 1891758686, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Green's specialty?
- William Green is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Green located?
- William Green's practice location on file with NPPES is One Hoag Dr, Newport Beach, CA 92658-6100.
- What is William Green's phone number?
- The practice phone number listed in the NPPES registry for William Green is (949) 764-5689.
- Does William Green accept Medicare?
- William Green is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Green's NPI active?
- Yes — William Green's NPI (1891758686) is active in the NPPES registry as of the last update on 2010-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.