Timothy Chang, MD
NPI 1962766337 · MOHS-Micrographic Surgery Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Chang, MD is a MOHS-Micrographic Surgery Physician provider in La Jolla, CA (NPI 1962766337).
Provider details
- NPI number
- 1962766337
- Entity type
- Individual
- Primary specialty
- MOHS-Micrographic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A142954 (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
13 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
6,766 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 | 2,257 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 923 | $100 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 811 | $61 |
| Removal and Microscopic Exam of Growth of Head, Neck, Hands, Feet, Or Genitals, 1-5 Tissue Blocks17311 | 373 | $539 |
| Destruction of Skin Growth, 1-14 Growths17110 | 325 | $130 |
| 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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 95 | 71 |
| Ketoconazole | 71 | 43 |
| Mupirocin | 63 | 53 |
| Clobetasol Propionate | 39 | 23 |
| Clindamycin Phosphate | 39 | 19 |
| Fluorouracil | 38 | 34 |
| Triamcinolone Acetonide | 32 | 27 |
| Hydrocortisone | 23 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,049 across 86 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
- 2012-06-29
- Last updated
- 2019-04-18
Frequently asked questions
- What is Timothy Chang's NPI number?
- Timothy Chang's National Provider Identifier (NPI) is 1962766337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Chang's specialty?
- Timothy Chang is listed in the NPPES registry with a primary specialty of MOHS-Micrographic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Chang located?
- Timothy Chang's practice location on file with NPPES is 9850 Genesee Ave Ste 850, La Jolla, CA 92037-1233.
- What is Timothy Chang's phone number?
- The practice phone number listed in the NPPES registry for Timothy Chang is (858) 657-0267.
- Does Timothy Chang accept Medicare?
- Timothy Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Chang's NPI active?
- Yes — Timothy Chang's NPI (1962766337) is active in the NPPES registry as of the last update on 2019-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.