Amy Chang, MD
NPI 1255490827 · Rheumatology Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Amy Chang, MD is a Rheumatology Physician provider in Riverside, CA (NPI 1255490827).
Provider details
- NPI number
- 1255490827
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A69032 (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
19 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 |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 333 | 123 |
| Prednisone | 208 | 86 |
| Hydroxychloroquine Sulfate | 197 | 73 |
| Adalimumab-Attobrand: Amjevita(cf) Autoinjector | 129 | 39 |
| Leflunomide | 98 | 40 |
| Allopurinol | 76 | 30 |
| Etanerceptbrand: Enbrel Sureclick |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 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
- 2006-12-08
- Last updated
- 2021-12-02
Frequently asked questions
- What is Amy Chang's NPI number?
- Amy Chang's National Provider Identifier (NPI) is 1255490827, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Amy Chang's specialty?
- Amy Chang is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Amy Chang located?
- Amy Chang's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is Amy Chang's phone number?
- The practice phone number listed in the NPPES registry for Amy Chang is (909) 353-2000.
- Does Amy Chang accept Medicare?
- Amy Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Amy Chang's NPI active?
- Yes — Amy Chang's NPI (1255490827) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.