Carl Chang, M.D.
NPI 1891983078 · Dermatology Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carl Chang, M.D. is a Dermatology Physician provider in Arcadia, CA (NPI 1891983078).
Provider details
- NPI number
- 1891983078
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A91493 (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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,527 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,132 | $98 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,091 | $8 |
| Destruction of Skin Growth, 1-14 Growths17110 | 317 | $123 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 297 | $58 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 185 | $120 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 144 | 102 |
| Ketoconazole | 136 | 63 |
| Clobetasol Propionate | 44 | 24 |
| Prednisone | 34 | 16 |
| Fluorouracil | 29 | 29 |
| Betamethasone Dipropionate | 22 | 18 |
| Metronidazole | 20 | — |
| Halobetasol Propionate | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$410 across 13 records (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
- 2007-10-12
- Last updated
- 2011-07-13
Frequently asked questions
- What is Carl Chang's NPI number?
- Carl Chang's National Provider Identifier (NPI) is 1891983078, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Chang's specialty?
- Carl Chang is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Carl Chang located?
- Carl Chang's practice location on file with NPPES is 100 N Santa Anita Ave, Arcadia, CA 91006-3108.
- What is Carl Chang's phone number?
- The practice phone number listed in the NPPES registry for Carl Chang is (626) 821-5998.
- Does Carl Chang accept Medicare?
- Carl Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carl Chang's NPI active?
- Yes — Carl Chang's NPI (1891983078) is active in the NPPES registry as of the last update on 2011-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.