Dr. Yin Chu Anny Chang, MD
- Medicare services, 2016
- 43
- Part D claims, 2024
- 12
- Hospital affiliations
- 1
- Industry payments
- $62
- Medical groups
- 3
- Practice address
- 3440 E La Palma Ave, Anaheim, CA 92806
- Practice phone
- Call (714) 279-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Yin Chu Anny Chang is an internist in Anaheim, California
Dr. Chang practices at Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
Dr. Chang's NPI, 1487979043, was assigned on April 7, 2010. Dr. Chang graduated from University of Texas Southwestern Medical School at Dallas in 2010. Dr. Chang holds California license A123781.
- NPI
- 1487979043NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173762192
- NPI enumeration date
- April 7, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 279-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Yin Chu Anny Chang practices at Orange County - Anaheim Medical Center in Anaheim, California
Dr. Chang's primary practice is Orange County - Anaheim Medical Center, at 3440 E La Palma Ave, Anaheim, CA 92806 in Orange County. The practice phone is (714) 279-4000.
- Orange County - Anaheim Medical Center3440 E La Palma Ave, Anaheim, CA 92806 · Orange CountyPhone(714) 279-4000
Source: Dmand AI Affiliation Data
Dr. Yin Chu Anny Chang is affiliated with 1 site of care and 3 medical groups
Dr. Chang's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chang to 2 more 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. Yin Chu Anny Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange County - Anaheim Medical Center | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Yin Chu Anny Chang is one of 16,751 internists in California
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chang is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Chang
Counts of internists 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. Yin Chu Anny Chang billed Medicare for 43 services in 2016
CMS data shows 43 Medicare services from Dr. Chang across 1 procedure code in 2016. Medicare paid $2,444 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chang compared with the California median for internists, 2016
- Dr. Chang
- California median
- Medicare services
- 43vs 36188% below
- Part D claims
- 99vs 42176% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2016
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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Yin Chu Anny Chang's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 59, with 50% 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 59
Patient panel by sex, all payers
- Women50%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Yin Chu Anny Chang wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 12 Medicare Part D claims. They cover 7 drugs, with $3,797 in total drug cost. In 2019, CMS named 194 claims across 13 drugs.
Dr. Chang's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 1942020: 9949%
Drugs named by CMS: 7 in 2020, 13 in 2019.
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
How Dr. Yin Chu Anny Chang takes part in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Yin Chu Anny Chang received $62 in industry payments from 2016 to 2021
CMS Open Payments shows 4 general payments to Dr. Chang from 2 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Mallinckrodt LLC paid the most, $45.
General payments to Dr. Chang by program year, 2016 to 2021
Companies that paid Dr. Chang the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Yin Chu Anny Chang graduated from University of Texas Southwestern Medical School at Dallas
Dr. Chang graduated from University of Texas Southwestern Medical School at Dallas in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Yin Chu Anny 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Yin Chu Anny 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. Yin Chu Anny Chang's NPI number?
Dr. Yin Chu Anny Chang's NPI number is 1487979043. It was assigned on April 7, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Yin Chu Anny Chang?
Dr. Yin Chu Anny Chang is an internist in Anaheim, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Yin Chu Anny Chang practice?
Dr. Chang practices at 3440 E La Palma Ave, Anaheim, CA 92806. Dr. Chang's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. Dmand AI also links Dr. Chang to 2 medical groups.
What is Dr. Yin Chu Anny Chang's office phone number?
The practice phone on file for Dr. Chang is (714) 279-4000.
What is Dr. Yin Chu Anny Chang's medical license number?
Dr. Chang holds California license A123781.
Which hospitals is Dr. Yin Chu Anny Chang affiliated with?
Dr. Chang practices at Orange County - Anaheim Medical Center in Anaheim, California.
What medical group is Dr. Yin Chu Anny Chang part of?
Dr. Chang is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Chang to 2 more medical groups.
Does Dr. Yin Chu Anny Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 43 services in 2016, and Dr. Chang accepts Medicare assignment.
What services does Dr. Yin Chu Anny Chang bill to Medicare?
In 2016, Dr. Chang's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Yin Chu Anny Chang go to medical school?
Dr. Chang graduated from University of Texas Southwestern Medical School at Dallas in 2010.
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What drugs does Dr. Yin Chu Anny Chang prescribe most?
In 2020 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Tamsulosin HCl and Cefuroxime.
Has Dr. Yin Chu Anny Chang received payments from drug or device companies?
CMS Open Payments shows $62 in general payments to Dr. Chang from 2 companies from 2016 to 2021. The largest total came from Mallinckrodt LLC.
How long has Dr. Yin Chu Anny Chang been practicing?
Dr. Chang graduated from medical school in 2010, 16 years ago.
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