Eric Chien-Yeh Chang, MD
Infectious Disease Physician · Portland, OR
Eric Chien-Yeh Chang, MD is an infectious disease physician with a practice address in Portland, Oregon, and NPI 1720290190, issued on May 5, 2007. Check the license (Oregon MD26818, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Eric Chien-Yeh Chang
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- MD26818 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2801 N Gantenbein Ave, Portland, OR 97227
- Phone
- (503) 413-6807
- Enumerated
- May 5, 2007
- Record last updated
- Aug 6, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (503) 413-2144
- Medicare enrollment
- Enrolled (PECOS I20071107000241); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 127 in Oregon → Look up another NPI →
Also registered at 2801 N Gantenbein Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Eric Chien-Yeh Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD26818Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average infectious disease physician in 2024
255 Medicare Part D claims for 41 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Ceftriaxone32 claims
- Cefazolin Sodium26 claims
- Triumeq19 claims
- Maraviroc13 claims
- Cephalexin12 claims
- Cefadroxil11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 6 group practices
- Legacy Clinics LLCPortland, OR
- Legacy Emanuel Hospital And Health CenterPortland, OR
- Legacy Salmon Creek HospitalVancouver, WA
- Providence Health And Services OregonPortland, OR
- Providence Health And Services WashingtonPortland, OR
- Providence Medical InstitutePortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric Chien-Yeh Chang among 127 infectious disease physician records in Oregon
Eric Chien-Yeh Chang, MD is one of 127 infectious disease physician records with a practice address in Oregon. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 42% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2002 · median 2007 among the 88 with a school on file
- Record last updated2008 · 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 207RI0200X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Oregon
There are 127 infectious disease physician records in Oregon.
All 127 in Oregon → Every provider in Portland → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Diana Antoniskis, M.D.Portland, OR 972271922116953
- Cliffton Bong, M.D.Portland, OR 972271609950849
- Raymond Bracis, M.D.Portland, OR 972271609897867
- Peter Leahey, M.D.Portland, OR 972271104143726
- Molly Stenzel, MDPortland, OR 972271174635874
- Josephine Williams, MDPortland, OR 972271407819139
- Nabil Al-Kourainy, MDPortland, OR 972251902339971
- Cameron Cover, MDPortland, OR 972251609806785
Common questions
What is Eric Chien-Yeh Chang, MD's NPI number?
Eric Chien-Yeh Chang, MD's National Provider Identifier (NPI) is 1720290190, issued on May 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Eric Chien-Yeh Chang, MD located?
The NPPES record lists a practice address at 2801 N Gantenbein Ave, Portland, OR, 97227. Phone: (503) 413-6807. Providers update this record themselves, so call before visiting.
How can I verify Eric Chien-Yeh Chang, MD's license?
NPPES lists Oregon license number MD26818, 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 Chien-Yeh Chang, MD prescribe under Medicare Part D?
In 2024, Eric Chien-Yeh Chang, MD had 255 Medicare Part D claims for 41 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Eric Chien-Yeh Chang, MD's MIPS final score?
The 2023 MIPS final score is 86.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.