Duke Chang, MD
NPI 1235290669 · Nephrology Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Duke Chang, MD is a Nephrology Physician provider in Torrance, CA (NPI 1235290669).
Provider details
- NPI number
- 1235290669
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- C43046 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,890 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,177 | $122 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 616 | $98 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 48 | $179 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 31 | $119 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 18 | $130 |
Typical Medicare-allowed amounts for these services range $98–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 71 | 11 |
| Atorvastatin Calcium | 36 | — |
| Pantoprazole Sodium | 33 | — |
| Furosemide | 30 | — |
| Losartan Potassium | 20 | — |
| Lisinopril | 19 | — |
| Apixabanbrand: Eliquis |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 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
Additional practice locations (1)
- 3663 Torrance BlvdSuite 7Torrance, CA 90503-4817Phone: (310) 316-6123Fax: (310) 316-1253
Registry dates
- Enumerated
- 2006-12-12
- Last updated
- 2024-07-03
- Certified
- 2024-07-03
Frequently asked questions
- What is Duke Chang's NPI number?
- Duke Chang's National Provider Identifier (NPI) is 1235290669, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Duke Chang's specialty?
- Duke Chang is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Duke Chang located?
- Duke Chang's practice location on file with NPPES is 22738 Meyler St, Torrance, CA 90502-2349.
- What is Duke Chang's phone number?
- The practice phone number listed in the NPPES registry for Duke Chang is (310) 344-3281.
- Does Duke Chang accept Medicare?
- Duke Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Duke Chang's NPI active?
- Yes — Duke Chang's NPI (1235290669) is active in the NPPES registry as of the last update on 2024-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.