Dr. Thomas Ryan Chang, MD
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 45
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Industry payments
- $816
- Practice address
- 2400 South Avenue a, Yuma, AZ 85364
- Practice phone
- Call (928) 336-7600
- 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
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thomas Ryan Chang is a plastic surgeon in Yuma, Arizona
Dr. Chang practices at Onvida Health Yuma Medical Center in Yuma, Arizona, part of Onvida Health.
Dr. Chang's NPI, 1689724254, was assigned on January 12, 2007. Dr. Chang holds Indiana license 01093807A.
- NPI
- 1689724254NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941356042
- NPI enumeration date
- January 12, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (928) 336-7600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Ryan Chang practices at Onvida Health Yuma Medical Center in Yuma, Arizona
Dr. Chang's primary practice is Onvida Health Yuma Medical Center, at 2400 South Avenue a, Yuma, AZ 85364 in Yuma County. The practice phone is (928) 336-7600.
- Onvida Health Yuma Medical Center2400 South Avenue a, Yuma, AZ 85364 · Yuma CountyPhone(928) 336-7600
Source: Dmand AI Affiliation Data
Dr. Thomas Ryan Chang is affiliated with 3 sites of care and 4 medical groups
Dr. Chang's primary practice is Onvida Health Yuma Medical Center in Yuma, Arizona, part of Onvida Health. The medical group on file is Onvida Health Yuma Medical Center. Dmand AI also links Dr. Chang to 3 more medical groups, 1 group practice or clinic and 1 ambulatory surgery center, each named with a free account. Dr. Chang's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas Ryan 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 |
|---|---|
| Onvida Health Yuma Medical Center | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Onvida Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Thomas Ryan Chang is one of 126 plastic surgeons in Arizona
Plastic surgery is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208200000X. Dmand AI has Dr. Chang's licenses on file in 5 states: Indiana, District of Columbia, Maryland, Pennsylvania and Virginia.
Specialties and state licenses
- Plastic surgery, IndianaPrimary
- District of Columbia license
- Maryland license
- Pennsylvania license
- Virginia license
Plastic surgeons near Dr. Chang
Counts of plastic surgeons 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. Thomas Ryan Chang treated 25 Medicare patients in 2024, average age 69
CMS counts 25 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 14 patients. 75% of them have high blood pressure, and 72% have high cholesterol. Their average risk score is 2.19, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 61, with 91% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chang's Medicare patients by sex, 2024
- Women1352%
- Men1248%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis52%
- Diabetes44%
Share of Medicare patients with each condition. A patient can have several.
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 61
Patient panel by sex, all payers
- Women91%
- Men9%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Ryan Chang wrote 45 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 45 Medicare Part D claims for 18 patients. 89% of them were for generic drugs. They cover 3 drugs, with $575 in total drug cost. In 2022, CMS named 71 claims across 3 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic40 claims89%
- Brand-name and other5 claims11%
Dr. Chang's most prescribed drugs by claims, 2023
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
- Antibiotics31%14 of 45 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 712023: 5227%
Drugs named by CMS: 3 in 2023, 3 in 2022.
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
Dr. Thomas Ryan Chang scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Chang for performance year 2024, reported through an alternative payment model (APM). Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 13 procedures of mastectomy by Dr. Chang, more than 68% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Chang's MIPS scores, performance year 2024
- 91of 100Final score
- 77.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Chang ranks in Medicare procedure volume
- Mastectomy
- 68th percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas Ryan Chang received $816 in industry payments from 2017 to 2025
CMS Open Payments shows 17 general payments to Dr. Chang from 5 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $672.
General payments to Dr. Chang by program year, 2017 to 2025
Companies that paid Dr. Chang the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas Ryan 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 patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Thomas Ryan 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. Thomas Ryan Chang's NPI number?
Dr. Thomas Ryan Chang's NPI number is 1689724254. It was assigned on January 12, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Ryan Chang?
Dr. Thomas Ryan Chang is a plastic surgeon in Yuma, Arizona. The primary specialty in the NPI Registry is Plastic Surgery Physician (taxonomy code 208200000X).
Where does Dr. Thomas Ryan Chang practice?
Dr. Chang practices at 2400 South Avenue a, Yuma, AZ 85364. Dr. Chang's primary practice is Onvida Health Yuma Medical Center in Yuma, Arizona, part of Onvida Health. Dmand AI also links Dr. Chang to 3 medical groups, 1 group practice or clinic and 1 ambulatory surgery center.
What is Dr. Thomas Ryan Chang's office phone number?
The practice phone on file for Dr. Chang is (928) 336-7600.
What is Dr. Thomas Ryan Chang's medical license number?
Dr. Chang holds Indiana license 01093807A, one of the licenses on file in 5 states.
Which states has Dr. Thomas Ryan Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in Indiana, District of Columbia, Maryland, Pennsylvania and Virginia.
Which hospitals is Dr. Thomas Ryan Chang affiliated with?
Dr. Chang practices at Onvida Health Yuma Medical Center in Yuma, Arizona.
What medical group is Dr. Thomas Ryan Chang part of?
Dr. Chang is linked to Onvida Health Yuma Medical Center. Dmand AI links Dr. Chang to 3 more medical groups.
Does Dr. Thomas Ryan Chang accept Medicare?
Yes. CMS lists Dr. Chang as accepting Medicare assignment.
What is Dr. Thomas Ryan Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 91 out of 100, reported through an alternative payment model (APM).
Show 4 more questionsShow fewer questions
How many Medicare patients does Dr. Thomas Ryan Chang see?
CMS counts 25 Medicare patients who saw Dr. Chang in 2024, with an average age of 69.
What drugs does Dr. Thomas Ryan Chang prescribe most?
In 2023 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Ibuprofen, Oxycodone-Acetaminophen and Cephalexin.
Has Dr. Thomas Ryan Chang received payments from drug or device companies?
CMS Open Payments shows $816 in general payments to Dr. Chang from 5 companies from 2017 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Thomas Ryan Chang been practicing?
Dr. Chang graduated from medical school in 1993, 33 years ago.
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