Dianna Ng, MD
NPI 1942599873 · Anatomic Pathology & Clinical Pathology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dianna Ng, MD is a Anatomic Pathology & Clinical Pathology Physician provider in San Francisco, CA (NPI 1942599873).
Provider details
- NPI number
- 1942599873
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A123180 (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
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,469 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 | 245 | $39 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 199 | $29 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 163 | $29 |
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 142 | $73 |
| Evaluation of Fine Needle Aspirate88172 | 128 | $37 |
| Pathology Cytologic Examination of Specimen During Surgery, Initial Site88333 | 123 | $64 |
Practice location
Mailing address
Additional practice locations (1)
- 400 Parnassus AveSan Francisco, CA 94143-2202Phone: (415) 476-1000
Registry dates
- Enumerated
- 2011-03-31
- Last updated
- 2020-06-23
- Certified
- 2020-06-23
Frequently asked questions
- What is Dianna Ng's NPI number?
- Dianna Ng's National Provider Identifier (NPI) is 1942599873, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dianna Ng's specialty?
- Dianna Ng is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Dianna Ng located?
- Dianna Ng's practice location on file with NPPES is 185 Berry St, San Francisco, CA 94107-5705.
- What is Dianna Ng's phone number?
- The practice phone number listed in the NPPES registry for Dianna Ng is (415) 353-7359.
- Does Dianna Ng accept Medicare?
- Dianna Ng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dianna Ng's NPI active?
- Yes — Dianna Ng's NPI (1942599873) is active in the NPPES registry as of the last update on 2020-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.