William Yong, MD
NPI 1578560520 · Anatomic Pathology & Clinical Pathology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Yong, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Los Angeles, CA (NPI 1578560520).
Provider details
- NPI number
- 1578560520
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G81305 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
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
911 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) |
|---|---|---|
| Antibody Evaluation, Each Additional Single Antibody Stain Procedure88350 | 255 | $30 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 121 | $29 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 109 | $38 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 100 | $12 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 68 | $36 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 62 | $84 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-06
- Last updated
- 2010-11-30
Frequently asked questions
- What is William Yong's NPI number?
- William Yong's National Provider Identifier (NPI) is 1578560520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Yong's specialty?
- William Yong is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is William Yong located?
- William Yong's practice location on file with NPPES is 10833 Le Conte Ave, Los Angeles, CA 90095-3075.
- What is William Yong's phone number?
- The practice phone number listed in the NPPES registry for William Yong is (310) 794-1355.
- Does William Yong accept Medicare?
- William Yong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Yong's NPI active?
- Yes — William Yong's NPI (1578560520) is active in the NPPES registry as of the last update on 2010-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.