Timothy W. Chang, MD
MOHS-Micrographic Surgery Physician · La Jolla, CA
Timothy W. Chang, MD is a mohs-micrographic surgery physician with a practice address in La Jolla, California, and NPI 1962766337, issued on Jun 29, 2012. Check the license (California A142954, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy W. Chang
- Credential
- MD
- Primary taxonomy
- MOHS-Micrographic Surgery Physician 207ND0101X
- License number
- A142954 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9850 Genesee Ave Ste 850, La Jolla, CA 92037
- Phone
- (858) 657-0267
- Enumerated
- Jun 29, 2012
- Record last updated
- Apr 18, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (858) 657-9485
- Medicare enrollment
- Enrolled (PECOS I20170420002701); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2012
- Entity
- Type 1 · individual
8 nearest mohs-micrographic surgery physician records → All 164 in California → Look up another NPI →
Also registered at 9850 Genesee Ave Ste 850
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joyce Cheng, MD, MHSDermatology Physician1144753468
Verify Timothy W. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142954Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average mohs-micrographic surgery physician in 2024
631 Medicare Part D claims for 274 beneficiaries, against an average of 570 among the 1,396 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Doxycycline Hyclate95 claims
- Ketoconazole71 claims
- Mupirocin63 claims
- Clindamycin Phosphate39 claims
- Clobetasol Propionate39 claims
- Fluorouracil38 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,049.11
86 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 1,074 providers of this specialty with any payment received $4,075.23 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Coastal Medical And Cosmetic Dermatology IncLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy W. Chang among 164 mohs-micrographic surgery physician records in California
Timothy W. Chang, MD is one of 164 mohs-micrographic surgery physician records with a practice address in California. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2012 · median 2004 among the 143 with a school on file
- Record last updated2019 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
MOHS-Micrographic Surgery Physician providers in California
There are 164 mohs-micrographic surgery physician records in California.
All 164 in California → Every provider in La Jolla → MOHS-Micrographic Surgery Physician nationwide →
The 8 mohs-micrographic surgery physician records with the nearest ZIP codes
- Hubert Greenway, M.D.La Jolla, CA 920371366419004
- Benjamin Kelley, M.D.La Jolla, CA 920371659702942
- Daniel Zelac, M.D.La Jolla, CA 920371891709903
- Eric Sorenson, M.D.Encinitas, CA 920241174918973
- David Thomas, MDEncintas, CA 920241770515884
- Steven Leshaw, MDOceanside, CA 920561952333254
- Alice Liu, MDOceanside, CA 920561235161308
- Sherry Rotunda, M.D.Oceanside, CA 920561154355097
Common questions
What is Timothy W. Chang, MD's NPI number?
Timothy W. Chang, MD's National Provider Identifier (NPI) is 1962766337, issued on Jun 29, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Timothy W. Chang, MD located?
The NPPES record lists a practice address at 9850 Genesee Ave Ste 850, La Jolla, CA, 92037. Phone: (858) 657-0267. Providers update this record themselves, so call before visiting.
How can I verify Timothy W. Chang, MD's license?
NPPES lists California license number A142954, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy W. Chang, MD prescribe under Medicare Part D?
In 2024, Timothy W. Chang, MD had 631 Medicare Part D claims for 274 beneficiaries; the average among mohs-micrographic surgery physician prescribers was 570. Part D covers Medicare prescriptions only.
What is Timothy W. Chang, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.