Johnny Tzer-Ren Chang, MD
Plastic Surgery Physician · Palo Alto, CA
Johnny Tzer-Ren Chang, MD is a plastic surgery physician with a practice address in Palo Alto, California, and NPI 1417175258, issued on Apr 24, 2007. Check the license (California A121316, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Johnny Tzer-Ren Chang
- Credential
- MD
- Primary taxonomy
- Plastic Surgery Physician 208200000X
- License number
- A121316 CA
Self-reported in NPPES; status is on the state search - Practice location
- 795 EL Camino Real, Palo Alto, CA 94301
- Phone
- (650) 853-2916
- Enumerated
- Apr 24, 2007
- Record last updated
- May 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (650) 853-2852
- Medicare enrollment
- Enrolled (PECOS I20120907000654); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest plastic surgery physician records → All 894 in California → Look up another NPI →
Also registered at 795 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hamza AbbasiInternal Medicine Physician1821545484
- Arman Abdalkhani, MDOtolaryngology Physician1356536130
- Sara AbrahamsInternal Medicine Physician1952988354
- Nana Efua Adabie, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1437647732
- Amy Adams, M.D.Dermatology Physician1679643928
- William Adams, DPMFoot & Ankle Surgery Podiatrist1447487830
Verify Johnny Tzer-Ren Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121316Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average plastic surgery physician in 2024
42 Medicare Part D claims for 17 beneficiaries, against an average of 93 among the 3,527 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $107.82
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,683 providers of this specialty with any payment received $5,316.31 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
- Sutter Bay Medical FoundationSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Johnny Tzer-Ren Chang among 894 plastic surgery physician records in California
Johnny Tzer-Ren Chang, MD is one of 894 plastic surgery physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 39% of these records are
- Graduated2006 · median 2002 among the 346 with a school on file
- Record last updated2020 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Plastic Surgery Physician providers in California
There are 894 plastic surgery physician records in California.
All 894 in California → Every provider in Palo Alto → Plastic Surgery Physician nationwide →
The 8 plastic surgery physician records with the nearest ZIP codes
- John Talley, M.D.Palo Alto, CA 943011861653255
- Daniel Tuerk, MDPalo Alto, CA 943031831471010
- James Chang, MDPalo Alto, CA 943041447269626
- Catherine Curtin, MDPalo Alto, CA 943041770667198
- Oscar Ho, MDPalo Alto, CA 943041750469896
- Peter Johannet, M.D.Palo Alto, CA 943041609885888
- David Kahn, M.D.Palo Alto, CA 943041346396512
- Gordon Lee, M.D.Palo Alto, CA 943041326009572
Common questions
What is Johnny Tzer-Ren Chang, MD's NPI number?
Johnny Tzer-Ren Chang, MD's National Provider Identifier (NPI) is 1417175258, issued on Apr 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Johnny Tzer-Ren Chang, MD located?
The NPPES record lists a practice address at 795 EL Camino Real, Palo Alto, CA, 94301. Phone: (650) 853-2916. Providers update this record themselves, so call before visiting.
How can I verify Johnny Tzer-Ren Chang, MD's license?
NPPES lists California license number A121316, 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 Johnny Tzer-Ren Chang, MD prescribe under Medicare Part D?
In 2024, Johnny Tzer-Ren Chang, MD had 42 Medicare Part D claims for 17 beneficiaries; the average among plastic surgery physician prescribers was 93. Part D covers Medicare prescriptions only.
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.