Amanda Graff-Baker, M.D.
NPI 1639495807 · Surgical Oncology Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Surgical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Amanda Graff-Baker, M.D. is a Surgical Oncology Physician provider in San Jose, CA (NPI 1639495807).
Provider details
- NPI number
- 1639495807
- Entity type
- Individual
- Primary specialty
- Surgical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
83% 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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 16 | — |
| Ibuprofen | 16 | 16 |
| Oxycodone Hcl | 13 | 13 |
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)
- 3181 Sw Sam Jackson Park RdL579Portland, OR 97239-3011Phone: (503) 494-8211
Registry dates
- Enumerated
- 2010-04-13
- Last updated
- 2021-12-17
Frequently asked questions
- What is Amanda Graff-Baker's NPI number?
- Amanda Graff-Baker's National Provider Identifier (NPI) is 1639495807, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Amanda Graff-Baker's specialty?
- Amanda Graff-Baker is listed in the NPPES registry with a primary specialty of Surgical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Amanda Graff-Baker located?
- Amanda Graff-Baker's practice location on file with NPPES is 280 Hospital Pkwy, San Jose, CA 95119-1103.
- What is Amanda Graff-Baker's phone number?
- The practice phone number listed in the NPPES registry for Amanda Graff-Baker is (408) 972-7000.
- Does Amanda Graff-Baker accept Medicare?
- Amanda Graff-Baker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Amanda Graff-Baker's NPI active?
- Yes — Amanda Graff-Baker's NPI (1639495807) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.