Patrick Chang, MD
Gastroenterology Physician · Los Angeles, CA
Patrick Chang, MD is a gastroenterology physician with a practice address in Los Angeles, California, and NPI 1750885307, issued on Mar 20, 2018. Check the license (California A164305, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Patrick Chang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A164305 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1520 San Pablo Street Suite 1000, Los Angeles, CA 90033
- Phone
- (323) 442-5100
- Enumerated
- Mar 20, 2018
- Record last updated
- Jul 9, 2024
- Medicare enrollment
- Enrolled (PECOS I20240604001880); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Verify Patrick Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A164305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average gastroenterology physician in 2024
71 Medicare Part D claims for 26 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of 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.
Industry payments in 2024: $3,386.38
24 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Genesis Healthcare Partners PCPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Chang among 2,140 gastroenterology physician records in California
Patrick Chang, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 94% of them.
- NPI issued2018 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2018 · median 2002 among the 1,538 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Los Angeles → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Ethelred Carter, M.D.Los Angeles, CA 900331336247964
- Laurie Deleve, M.D.Los Angeles, CA 900331407882947
- Andrew Ippoliti, M.D.Los Angeles, CA 900331881621308
- Rome Jutabha, M.D.Los Angeles, CA 900331790785434
- John Kim, M.D.Los Angeles, CA 900331467676460
- Michael Kline, M.D.Los Angeles, CA 900331720017338
- Karen Lindsay, M.D.Los Angeles, CA 900331295765857
- Shelly Lu, M.D.Los Angeles, CA 900331386673606
Common questions
What is Patrick Chang, MD's NPI number?
Patrick Chang, MD's National Provider Identifier (NPI) is 1750885307, issued on Mar 20, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Chang, MD located?
The NPPES record lists a practice address at 1520 San Pablo Street Suite 1000, Los Angeles, CA, 90033. Phone: (323) 442-5100. Providers update this record themselves, so call before visiting.
How can I verify Patrick Chang, MD's license?
NPPES lists California license number A164305, 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 Patrick Chang, MD prescribe under Medicare Part D?
In 2024, Patrick Chang, MD had 71 Medicare Part D claims for 26 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.