Joshua Chang, M.D.
NPI 1205399680 · Dermatology Physician · Allentown, PA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joshua Chang, M.D. is a Dermatology Physician provider in Allentown, PA (NPI 1205399680).
Provider details
- NPI number
- 1205399680
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- 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 tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
860 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 191 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 152 | $85 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 118 | $51 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 88 | $106 |
| Biopsy of Related Skin Growth, First Growth11102 | 87 | $85 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 56 | 33 |
| Triamcinolone Acetonide | 40 | 34 |
| Doxycycline Hyclate | 33 | 15 |
| Clobetasol Propionate | 29 | 17 |
| Fluorouracil | 28 | 27 |
| Minoxidil | 27 | — |
| Imiquimod | 23 | 22 |
| Mupirocin | 16 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$552 across 27 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
- 2019-04-11
- Last updated
- 2023-08-31
Frequently asked questions
- What is Joshua Chang's NPI number?
- Joshua Chang's National Provider Identifier (NPI) is 1205399680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshua Chang's specialty?
- Joshua Chang is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Joshua Chang located?
- Joshua Chang's practice location on file with NPPES is 250 Centronia Road, Allentown, PA 18104.
- What is Joshua Chang's phone number?
- The practice phone number listed in the NPPES registry for Joshua Chang is (501) 686-5162.
- Does Joshua Chang accept Medicare?
- Joshua Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joshua Chang's NPI active?
- Yes — Joshua Chang's NPI (1205399680) is active in the NPPES registry as of the last update on 2023-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.