William Thomas Chang, DO
Pain Medicine (Anesthesiology) Physician · Iowa City, IA
William Thomas Chang, DO is a pain medicine (anesthesiology) physician with a practice address in Iowa City, Iowa, and NPI 1770112609, issued on Apr 2, 2020. Check the license (Iowa R-13014, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William Thomas Chang
- Credential
- DO
- Primary taxonomy
- Pain Medicine (Anesthesiology) Physician 207LP2900X
- License numbers
- R-13014 IA
125.078730 IL
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 356-4076
- Enumerated
- Apr 2, 2020
- Record last updated
- Mar 27, 2024
- Medicare enrollment
- Enrolled (PECOS I20250819004761); accepts Medicare assignment
- Medical or professional school
- Marian University College Of Osteopathic Medicine, 2020
- Entity
- Type 1 · individual
Also registered at 200 Hawkins Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Helena Aaberg, MDAnesthesiology Physician1689301558
- Abdullah Abbasi, MDGastroenterology Physician1932944204
- Mary Jo Abbott, RPHPharmacist1841325875
- Francois Abboud, MDCardiovascular Disease Physician1598753113
- Abdalla Abdalla, MBBCHAnatomic Pathology & Clinical Pathology Physician1518859826
- Sameh AbdallaAnatomic Pathology & Clinical Pathology Physician1437902160
Verify William Thomas Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license R-13014Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
97% fewer Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024
53 Medicare Part D claims for 25 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 15 claims were for opioids.
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: $3,415.66
25 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 2,789 providers of this specialty with any payment received $3,225.41 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.
Bills Medicare through one group practice
- Deaconess Specialty Physicians, IncHenderson, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pain Medicine (Anesthesiology) Physician providers in Iowa
There are 23 pain medicine (anesthesiology) physician records in Iowa.
Other pain medicine (anesthesiology) physician records in Iowa
- Justin Elwood, MDWaterloo, IA1639518426
- Robert FederhoferWaterloo, IA1154361707
- Gene Gessner, MDGrinnell, IA1194779736
- Gayathry Inamdar, MDWaterloo, IA1992740401
- Maruti Kari, M.D., M.P.H.Bettendorf, IA1326275413
- Taehong Lim, MDIowa City, IA1548886609
- Timothy Maves, MDIowa City, IA1568435568
- Daniel Moyse, M.D.Des Moines, IA1508155524
- Arnold Parenteau, M.D.Ames, IA1518948793
- Steven Quam, D.O.West Des Moines, IA1780681551
Common questions
What is William Thomas Chang, DO's NPI number?
William Thomas Chang, DO's National Provider Identifier (NPI) is 1770112609, issued on Apr 2, 2020. An NPI identifies a provider in billing; it is not a license.
Where is William Thomas Chang, DO located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 356-4076. Providers update this record themselves, so call before visiting.
How can I verify William Thomas Chang, DO's license?
NPPES lists Iowa license number R-13014, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Thomas Chang, DO prescribe under Medicare Part D?
In 2024, William Thomas Chang, DO had 53 Medicare Part D claims for 25 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. 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.