Joseph Chan, M.D.
NPI 1497796189 · Hematology & Oncology Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Chan, M.D. is a Hematology & Oncology Physician provider in Fontana, CA (NPI 1497796189).
Provider details
- NPI number
- 1497796189
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A99860 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Abiraterone Acetate | 566 | 83 |
| Prednisone | 244 | 101 |
| Anastrozole | 239 | 94 |
| Enzalutamidebrand: Xtandi | 102 | 18 |
| Dexamethasone | 90 | 30 |
| Palbociclibbrand: Ibrance | 90 | — |
| Lenalidomide | 82 | 16 |
| Hydroxyurea | 57 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$89 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-10
- Last updated
- 2021-11-29
Frequently asked questions
- What is Joseph Chan's NPI number?
- Joseph Chan's National Provider Identifier (NPI) is 1497796189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Chan's specialty?
- Joseph Chan is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Chan located?
- Joseph Chan's practice location on file with NPPES is 9985 Sierra Ave, Fontana, CA 92335-6720.
- What is Joseph Chan's phone number?
- The practice phone number listed in the NPPES registry for Joseph Chan is (909) 427-5000.
- Does Joseph Chan accept Medicare?
- Joseph Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Chan's NPI active?
- Yes — Joseph Chan's NPI (1497796189) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.