Dr. Simon Y. Chang, MD
- Medicare services, 2022
- 207
- Part D claims, 2024
- 4,042
- Industry payments
- $32
- Affiliated sites
- 3
- Medical groups
- 3
- Practice address
- 10426 Bogardus Ave, Whittier, CA 90603
- Practice phone
- Call (562) 947-7817
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Whittier Hills Healthcare Center
Skilled Nursing Facility · Whittier, California
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Simon Y. Chang is a family medicine physician in Whittier, California
Dr. Chang practices at Whittier Hills Healthcare Center in Whittier, California.
Dr. Chang's NPI, 1760594097, was assigned on August 31, 2006. Dr. Chang graduated from Northwestern University Feinberg Medical School in 1998. Dr. Chang holds California license A69205.
- NPI
- 1760594097NPI Registry (opens in a new tab)
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Practice phone
- (562) 947-7817
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Simon Y. Chang practices at Whittier Hills Healthcare Center in Whittier, California
Dr. Chang's primary practice is Whittier Hills Healthcare Center, at 10426 Bogardus Ave, Whittier, CA 90603 in Los Angeles County. The practice phone is (562) 947-7817.
- Whittier Hills Healthcare Center10426 Bogardus Ave, Whittier, CA 90603 · Los Angeles CountyPhone(562) 947-7817
Source: Dmand AI Affiliation Data
Dr. Simon Y. Chang is affiliated with 3 sites of care and 3 medical groups
Dr. Chang's primary practice is Whittier Hills Healthcare Center in Whittier, California. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Chang to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Simon Y. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Whittier Hills Healthcare Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Simon Y. Chang is one of 15,680 family medicine physicians in California
Family medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chang is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Chang
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Simon Y. Chang billed Medicare for 207 services in 2022
CMS data shows 207 Medicare services from Dr. Chang across 2 procedure codes in 2022. Medicare paid $10,018 for them.
Dr. Chang's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1,3102022: 20784%
Where Dr. Chang's Medicare services took place, 2022
- In an office8843%
- In a facility11957%
Dr. Chang compared with the California median for family medicine physicians, 2022
- Dr. Chang
- California median
- Medicare services
- 207vs 24616% below
- Part D claims
- 3,375vs 8334.1 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Simon Y. Chang's patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 79, with 55% women.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Simon Y. Chang wrote 4,042 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 4,042 Medicare Part D claims for 239 patients. 83% of them were for generic drugs. CMS names the drug for 3,375 of them, across 86 drugs with 11 or more claims each, at $180,947 in total drug cost. In 2023, CMS named 3,198 claims across 77 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic3,360 claims83%
- Brand-name and other682 claims17%
Dr. Chang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chang's Part D claims, 2024
- Opioids0%16 of 4,042 claims
- Antibiotics3%118 of 4,042 claims
- Antipsychotics, patients 65 and over2%63 of 4,042 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,1982024: 3,3756%
Drugs named by CMS: 86 in 2024, 77 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Simon Y. Chang received $32 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Chang from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $32.
Companies that paid Dr. Chang the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Simon Y. Chang graduated from Northwestern University Feinberg Medical School
Dr. Chang graduated from Northwestern University Feinberg Medical School in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Simon Y. Chang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Simon Y. Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Simon Y. Chang's NPI number?
Dr. Simon Y. Chang's NPI number is 1760594097. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Simon Y. Chang?
Dr. Simon Y. Chang is a family medicine physician in Whittier, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Simon Y. Chang practice?
Dr. Chang practices at 10426 Bogardus Ave, Whittier, CA 90603. Dr. Chang's primary practice is Whittier Hills Healthcare Center in Whittier, California. Dmand AI also links Dr. Chang to 2 group practices and clinics and 2 medical groups.
What is Dr. Simon Y. Chang's office phone number?
The practice phone on file for Dr. Chang is (562) 947-7817.
What is Dr. Simon Y. Chang's medical license number?
Dr. Chang holds California license A69205.
What medical group is Dr. Simon Y. Chang part of?
Dr. Chang is linked to Optum - Downtown Los Angeles. Dmand AI links Dr. Chang to 2 more medical groups.
Does Dr. Simon Y. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 207 services in 2022.
What services does Dr. Simon Y. Chang bill to Medicare?
In 2022, Dr. Chang's most billed Medicare services were nursing facility care (99309) and care management and other visits (99497).
Where did Dr. Simon Y. Chang go to medical school?
Dr. Chang graduated from Northwestern University Feinberg Medical School in 1998.
What drugs does Dr. Simon Y. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Eliquis and Amlodipine Besylate.
Has Dr. Simon Y. Chang received payments from drug or device companies?
CMS Open Payments shows $32 in general payments to Dr. Chang from 1 company from 2021 to 2021. The largest total came from Eli Lilly and Company.
How long has Dr. Simon Y. Chang been practicing?
Dr. Chang graduated from medical school in 1998, 28 years ago.
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