Eric Michael Chang, M.D.
Radiation Oncology Physician · Portland, OR
Eric Michael Chang, M.D. is a radiation oncology physician with a practice address in Portland, Oregon, and NPI 1114304870, issued on May 1, 2015. Check the license (Oregon MD197811, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Eric Michael Chang
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD197811 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3181 SW Sam Jackson Park RD # L337, Portland, OR 97239
- Phone
- (503) 494-8756
- Enumerated
- May 1, 2015
- Record last updated
- Oct 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200630003094); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 115 in Oregon → Look up another NPI →
Also registered at 3181 SW Sam Jackson Park RD # L337
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aaron Grossberg, MD, PHDRadiation Oncology Physician1164775334
- Reid Thompson, MD PHDRadiation Oncology Physician1659662377
Verify Eric Michael Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD197811Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average radiation oncology physician in 2024
125 Medicare Part D claims for 44 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 45 claims were for opioids.
Most prescribed
- Oxycodone Hcl32 claims
- Lidocaine Hcl Viscous18 claims
- Lorazepam14 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric Michael Chang among 115 radiation oncology physician records in Oregon
Eric Michael Chang, M.D. is one of 115 radiation oncology physician records with a practice address in Oregon. 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 2015, is newer than 78% of them.
- NPI issued2015 · 78% of these records are older, 17% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2015 · median 2006 among the 85 with a school on file
- Record last updated2020 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Oregon
There are 115 radiation oncology physician records in Oregon.
All 115 in Oregon → Every provider in Portland → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Lanceford Chong, MDPortland, OR 972391821001736
- Aaron Grossberg, MD, PHDPortland, OR 972391164775334
- Mohammad Hissourou, MDPortland, OR 972391538664057
- John Holland, MDPortland, OR 972391104834662
- Arthur Hung, MDPortland, OR 972391609881119
- Jenna Kahn, M.D.Portland, OR 972391366855793
- Nima Nabavizadeh, MDPortland, OR 972391538453741
- Sahar Rosenbaum, MDPortland, OR 972391477537512
Common questions
What is Eric Michael Chang, M.D.'s NPI number?
Eric Michael Chang, M.D.'s National Provider Identifier (NPI) is 1114304870, issued on May 1, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Eric Michael Chang, M.D. located?
The NPPES record lists a practice address at 3181 SW Sam Jackson Park RD # L337, Portland, OR, 97239. Phone: (503) 494-8756. Providers update this record themselves, so call before visiting.
How can I verify Eric Michael Chang, M.D.'s license?
NPPES lists Oregon license number MD197811, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eric Michael Chang, M.D. prescribe under Medicare Part D?
In 2024, Eric Michael Chang, M.D. had 125 Medicare Part D claims for 44 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.