William Esler, MD
NPI 1366403685 · Hematology & Oncology Physician · Amarillo, TX
William Esler, MD is a Hematology & Oncology Physician provider in Amarillo, TX (NPI 1366403685).
Provider details
- NPI number
- 1366403685
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- F1531 (TX)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-28
- Last updated
- 2008-02-18
Frequently asked questions
- What is William Esler's NPI number?
- William Esler's National Provider Identifier (NPI) is 1366403685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Esler's specialty?
- William Esler is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Esler located?
- William Esler's practice location on file with NPPES is 1000 S Coulter St, Amarillo, TX 79106-1781.
- What is William Esler's phone number?
- The practice phone number listed in the NPPES registry for William Esler is (806) 358-8654.
- Is William Esler's NPI active?
- Yes — William Esler's NPI (1366403685) is active in the NPPES registry as of the last update on 2008-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.