William Bishop, D.O.
NPI 1821268533 · Anatomic Pathology & Clinical Pathology Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Bishop, D.O. is a Anatomic Pathology & Clinical Pathology Physician provider in Arcadia, CA (NPI 1821268533).
Provider details
- NPI number
- 1821268533
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A10631 (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
18 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
2,159 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 669 | $41 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 425 | $30 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 301 | $12 |
| Preparation of Tissue for Examination By Removing Any Calcium Present88311 | 249 | $13 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 195 | $29 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 96 | $38 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-03-10
- Last updated
- 2014-07-08
Frequently asked questions
- What is William Bishop's NPI number?
- William Bishop's National Provider Identifier (NPI) is 1821268533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Bishop's specialty?
- William Bishop is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is William Bishop located?
- William Bishop's practice location on file with NPPES is 300 W Huntington Dr, Arcadia, CA 91007-3402.
- What is William Bishop's phone number?
- The practice phone number listed in the NPPES registry for William Bishop is (626) 574-3488.
- Does William Bishop accept Medicare?
- William Bishop is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Bishop's NPI active?
- Yes — William Bishop's NPI (1821268533) is active in the NPPES registry as of the last update on 2014-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.