William Harrell, MD
NPI 1083673685 · Internal Medicine Physician · Los Alamitos, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Harrell, MD is a Internal Medicine Physician provider in Los Alamitos, CA (NPI 1083673685).
Provider details
- NPI number
- 1083673685
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G64492 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 66 | 32 |
| Amlodipine Besylate | 48 | 20 |
| Levothyroxine Sodium | 37 | 18 |
| Losartan Potassium | 30 | — |
| Rosuvastatin Calcium | 28 | — |
| Metformin Hcl | 26 | 12 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-22
- Last updated
- 2024-10-11
- Certified
- 2024-10-11
Frequently asked questions
- What is William Harrell's NPI number?
- William Harrell's National Provider Identifier (NPI) is 1083673685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Harrell's specialty?
- William Harrell is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Harrell located?
- William Harrell's practice location on file with NPPES is 10861 Cherry St Ste 209, Los Alamitos, CA 90720-5407.
- What is William Harrell's phone number?
- The practice phone number listed in the NPPES registry for William Harrell is (310) 948-5903.
- Does William Harrell accept Medicare?
- William Harrell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Harrell's NPI active?
- Yes — William Harrell's NPI (1083673685) is active in the NPPES registry as of the last update on 2024-10-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.