Sophia S. Chang, M.D.
Rheumatology Physician · Pasco, WA
Sophia S. Chang, M.D. is a rheumatology physician with a practice address in Pasco, Washington, and NPI 1588658074, issued on Sep 11, 2005. Check the license (Washington MD00036177, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Sophia S. Chang
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MD00036177 WA
Self-reported in NPPES; status is on the state search - Practice location
- 516 W Margaret St, Pasco, WA 99301
- Phone
- (509) 547-6086
- Enumerated
- Sep 11, 2005
- Record last updated
- Sep 16, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (509) 547-0649
- Medicare enrollment
- Enrolled (PECOS I20100126000881); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 200 in Washington → Look up another NPI →
Also registered at 516 W Margaret St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Saunders, M.D.Specialist1346305620
Verify Sophia S. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00036177Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,087 Medicare Part D claims for 100 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Methotrexate251 claims
- Leflunomide190 claims
- Hydroxychloroquine Sulfate186 claims
- Sulfasalazine Dr100 claims
- Sulfasalazine70 claims
- Gabapentin67 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: $36.60
1 payment: food and beverage; the largest payer was Genentech USA, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Sophia S. Chang among 200 rheumatology physician records in Washington
Sophia S. Chang, M.D. is one of 200 rheumatology physician records with a practice address in Washington. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1983 · median 2005 among the 123 with a school on file
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Washington
There are 200 rheumatology physician records in Washington.
All 200 in Washington → Every provider in Pasco → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Hebatalla Allam, M.D.Kennewick, WA 993361033566336
- Aveena Gurung, MDKennewick, WA 993361699296491
- Sandra Horvath-Dori, M.D.Kennewick, WA 993361689666927
- Jaspreet Kaler, M.D.Kennewick, WA 993361558745083
- John McCormick, M.D.Kennewick, WA 993361770590556
- David Sandoval, MDKennewick, WA 993361003872094
- Derek Peacock, MDRichland, WA 993521720085038
- Katherine Perry, M.D.Richland, WA 993521154302404
Common questions
What is Sophia S. Chang, M.D.'s NPI number?
Sophia S. Chang, M.D.'s National Provider Identifier (NPI) is 1588658074, issued on Sep 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sophia S. Chang, M.D. located?
The NPPES record lists a practice address at 516 W Margaret St, Pasco, WA, 99301. Phone: (509) 547-6086. Providers update this record themselves, so call before visiting.
How can I verify Sophia S. Chang, M.D.'s license?
NPPES lists Washington license number MD00036177, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sophia S. Chang, M.D. prescribe under Medicare Part D?
In 2024, Sophia S. Chang, M.D. had 1,087 Medicare Part D claims for 100 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.