Fangdi Sun, MD
NPI 1861996175 · Medical Oncology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Fangdi Sun, MD is a Medical Oncology Physician provider in Stanford, CA (NPI 1861996175).
Provider details
- NPI number
- 1861996175
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A165364 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Erlotinib Hcl | 11 |
| Ondansetron Hcl | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 900 Blake Wilbur DrPalo Alto, CA 94304-2201Phone: (650) 498-6000
Registry dates
- Enumerated
- 2018-03-21
- Last updated
- 2025-10-06
- Certified
- 2025-10-06
Frequently asked questions
- What is Fangdi Sun's NPI number?
- Fangdi Sun's National Provider Identifier (NPI) is 1861996175, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Fangdi Sun's specialty?
- Fangdi Sun is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Fangdi Sun located?
- Fangdi Sun's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Fangdi Sun's phone number?
- The practice phone number listed in the NPPES registry for Fangdi Sun is (650) 723-4000.
- Does Fangdi Sun accept Medicare?
- Fangdi Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Fangdi Sun's NPI active?
- Yes — Fangdi Sun's NPI (1861996175) is active in the NPPES registry as of the last update on 2025-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.