Dr. Sophia S. Chang, MD
- Medicare services, 2024
- 17,956
- Medicare patients, 2024
- 99
- Part D claims, 2024
- 1,087
- Hospital affiliations
- 1
- Industry payments
- $1,976
- Practice address
- 520 N Fourth Avenue, Pasco, WA 99301
- Practice phone
- Call (509) 546-2278
- 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. Sophia S. Chang is a rheumatologist in Pasco, Washington
Dr. Chang practices at Lourdes Medical Center in Pasco, Washington, part of Lifepoint Health.
Dr. Chang's NPI, 1588658074, was assigned on September 11, 2005. Dr. Chang holds Washington license MD00036177.
- NPI
- 1588658074NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092857276
- NPI enumeration date
- September 11, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (509) 546-2278
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sophia S. Chang practices at Lourdes Medical Center in Pasco, Washington
Dr. Chang's primary practice is Lourdes Medical Center, at 520 N Fourth Avenue, Pasco, WA 99301 in Franklin County. The practice phone is (509) 546-2278.
- Lourdes Medical Center520 N Fourth Avenue, Pasco, WA 99301 · Franklin CountyPhone(509) 546-2278
Source: Dmand AI Affiliation Data
Dr. Sophia S. Chang is affiliated with 2 sites of care
Dr. Chang's primary practice is Lourdes Medical Center in Pasco, Washington, part of Lifepoint Health. Dmand AI also links Dr. Chang to 1 clinical lab, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Sophia S. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lourdes Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Lifepoint Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Sophia S. Chang is one of 156 rheumatologists in Washington
Rheumatology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Chang is licensed in Washington.
Specialties and state licenses
- Rheumatology, WashingtonPrimary
Rheumatologists near Dr. Chang
Counts of rheumatologists 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. Sophia S. Chang billed Medicare for 17,956 services in 2024
CMS data shows 17,956 Medicare services from Dr. Chang across 6 procedure codes in 2024, for 99 Medicare patients. Medicare paid $216,542 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 19,9852024: 17,30213%
- Office and hospital visits
- 2023: 4902024: 4636%
- Tests and treatments
- 2023: 2062024: 1917%
Dr. Chang compared with the Washington median for rheumatologists, 2024
- Dr. Chang
- Washington median
- Medicare services
- 17,956vs 76323.5 times
- Medicare patients
- 99vs 20451% below
- Part D claims
- 992vs 9287% above
Medians across 159 rheumatologists in Washington with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2024
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Sophia S. Chang treated 99 Medicare patients in 2024, average age 75
CMS counts 99 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 46 patients. 75% of them have arthritis, and 72% have high blood pressure. Their average risk score is 1.48, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 71, with 73% 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
- Women7576%
- Men2424%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- Arthritis75%
- High blood pressure72%
- High cholesterol64%
- Chronic kidney disease54%
- Diabetes30%
- Osteoporosis30%
- Asthma17%
- Mood disorders15%
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 71
Patient panel by sex, all payers
- Women73%
- Men27%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Sophia S. Chang wrote 1,087 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 1,087 Medicare Part D claims for 100 patients. 77% of them were for generic drugs. CMS names the drug for 992 of them, across 11 drugs with 11 or more claims each, at $183,467 in total drug cost. In 2023, CMS named 916 claims across 12 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic838 claims77%
- Brand-name and other249 claims23%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9162024: 9928%
Drugs named by CMS: 11 in 2024, 12 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
How Dr. Sophia S. 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. Sophia S. Chang received $1,976 in industry payments from 2016 to 2025
CMS Open Payments shows 91 general payments to Dr. Chang from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Pfizer Inc. paid the most, $601.
General payments to Dr. Chang by program year, 2016 to 2025
General payments to Dr. Chang by kind, 2016 to 2025
- Food and beverage$1,95999%
- Education$161%
Companies that paid Dr. Chang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Sophia S. 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 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) |
| 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. Sophia S. 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. Sophia S. Chang's NPI number?
Dr. Sophia S. Chang's NPI number is 1588658074. It was assigned on September 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Sophia S. Chang?
Dr. Sophia S. Chang is a rheumatologist in Pasco, Washington. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Sophia S. Chang practice?
Dr. Chang practices at 520 N Fourth Avenue, Pasco, WA 99301. Dr. Chang's primary practice is Lourdes Medical Center in Pasco, Washington, part of Lifepoint Health. Dmand AI also links Dr. Chang to 1 clinical lab.
What is Dr. Sophia S. Chang's office phone number?
The practice phone on file for Dr. Chang is (509) 546-2278.
What is Dr. Sophia S. Chang's medical license number?
Dr. Chang holds Washington license MD00036177.
Which hospitals is Dr. Sophia S. Chang affiliated with?
Dr. Chang practices at Lourdes Medical Center in Pasco, Washington.
Does Dr. Sophia S. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 17,956 services in 2024, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. Sophia S. Chang see?
CMS counts 99 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
What services does Dr. Sophia S. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were injected or infused drug (J1602), injected or infused drug (J0897) and office visit, established patient (99214).
What drugs does Dr. Sophia S. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Methotrexate, Leflunomide and Hydroxychloroquine Sulfate.
Has Dr. Sophia S. Chang received payments from drug or device companies?
CMS Open Payments shows $1,976 in general payments to Dr. Chang from 16 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Sophia S. Chang been practicing?
Dr. Chang graduated from medical school in 1983, 43 years ago.
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