Janet Chang, D.O.
Family Medicine Physician · Corvallis, OR
Janet Chang, D.O. is a family medicine physician with a practice address in Corvallis, Oregon, and NPI 1073593422, issued on Jan 20, 2006. Check the license (Oregon DO156843, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Janet Chang
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- DO156843 OR
Self-reported in NPPES; status is on the state search - Practice location
- 5234 SW Philomath Blvd, Corvallis, OR 97333
- Phone
- (541) 768-4970
- Enumerated
- Jan 20, 2006
- Record last updated
- Nov 6, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120815000322); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 5234 SW Philomath Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel Blumel, PA-CPhysician Assistant1366108227
- Daniel Ebert, DOFamily Medicine Physician1851884506
- Maximilian Kaiser, DOFamily Medicine Physician1649618463
- Megan Louie, DOFamily Medicine Physician1548842578
- Sandra Minta, PSY.D.Psychologist1427273341
- Shauna O'Neal, FNP/CNMFamily Nurse Practitioner1710435201
Verify Janet Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO156843Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
34 Medicare Part D claims for 29 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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): 91.4 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 2 group practices
- Albany General HospitalAlbany, OR
- Good Samaritan Hospital CorvallisCorvallis, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Janet Chang among 2,847 family medicine physician records in Oregon
Janet Chang, D.O. is one of 2,847 family medicine physician records with a practice address in Oregon. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2009 among the 1,671 with a school on file
- Record last updated2020 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
114 family medicine physician records list a practice address in Corvallis
They are 114 of the 4,096 NPPES records with a practice address in Corvallis, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Corvallis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Andrew Cornwell, MDCorvallis, OR 973331841435302
- Daniel Ebert, DOCorvallis, OR 973331851884506
- Alan Embry, M.D.Corvallis, OR 973331073667598
- Maximilian Kaiser, DOCorvallis, OR 973331649618463
- Megan Louie, DOCorvallis, OR 973331548842578
- Robin Page-Echols, D.O.Corvallis, OR 973331427379650
- Eric Sharp, D.O.Corvallis, OR 973331700015823
- Timothy Ueng, MDCorvallis, OR 973331861451916
Common questions
What is Janet Chang, D.O.'s NPI number?
Janet Chang, D.O.'s National Provider Identifier (NPI) is 1073593422, issued on Jan 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Janet Chang, D.O. located?
The NPPES record lists a practice address at 5234 SW Philomath Blvd, Corvallis, OR, 97333. Phone: (541) 768-4970. Providers update this record themselves, so call before visiting.
How can I verify Janet Chang, D.O.'s license?
NPPES lists Oregon license number DO156843, 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 Janet Chang, D.O. prescribe under Medicare Part D?
In 2024, Janet Chang, D.O. had 34 Medicare Part D claims for 29 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Janet Chang, D.O.'s MIPS final score?
The 2023 MIPS final score is 91.4 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.