Wooin Ahn, M.D.
Nephrology Physician · Portland, OR
Wooin Ahn, M.D. is a nephrology physician with a practice address in Portland, Oregon, and NPI 1366608267, issued on Jul 31, 2008. Check the license (Oregon MD213267, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Wooin Ahn
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- MD213267 OR
249946 MA
270920 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3181 SW Sam Jackson Park RD, Portland, OR 97239
- Phone
- (503) 494-3442
- Enumerated
- Jul 31, 2008
- Record last updated
- Jun 30, 2023
- Fax
- (503) 494-5330
- Medicare enrollment
- Enrolled (PECOS I20230605001407); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 3181 SW Sam Jackson Park RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alex AamodtCritical Care Medicine Registered Nurse1154257590
- Jefferson Abaricia, MD, PHDStudent in an Organized Health Care Education/Training Program1073215711
- Kenneth Abbey, MDAnesthesiology Physician1588779342
- Matthew Abbott, PA-CMedical Physician Assistant1154738003
- Ayah Abdelsalam Megahed, MD, MSCVascular & Interventional Radiology Physician1023503596
- Obada Abdulrazzak, MDStudent in an Organized Health Care Education/Training Program1598567430
Verify Wooin Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD213267Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average nephrology physician in 2024
257 Medicare Part D claims for 62 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Losartan Potassium39 claims
- Calcitriol19 claims
- Calcium Acetate16 claims
- Furosemide15 claims
- Torsemide14 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University Professional ServicesPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Oregon
There are 136 nephrology physician records in Oregon.
Other nephrology physician records in Oregon
- Fadi Akoum, M.D.Hermiston, OR1952577231
- Sharon Anderson, MDPortland, OR1285642710
- Andreea Andone, M.D.Salem, OR1891711446
- Tyler Andrea, DOCorvallis, OR1295183291
- Nayan Arora, M.D.Portland, OR1700102159
- Rupali Avasare, M.D.Portland, OR1265676324
- Susan Bagby, MDPortland, OR1245245760
- William Bennett, MDPortland, OR1457320525
- Poojitha Beravol, M.D.Corvallis, OR1073749396
- Sonia Bynum, M.D.Hillsboro, OR1154518504
Common questions
What is Wooin Ahn, M.D.'s NPI number?
Wooin Ahn, M.D.'s National Provider Identifier (NPI) is 1366608267, issued on Jul 31, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Wooin Ahn, M.D. located?
The NPPES record lists a practice address at 3181 SW Sam Jackson Park RD, Portland, OR, 97239. Phone: (503) 494-3442. Providers update this record themselves, so call before visiting.
How can I verify Wooin Ahn, M.D.'s license?
NPPES lists Oregon license number MD213267, 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 Wooin Ahn, M.D. prescribe under Medicare Part D?
In 2024, Wooin Ahn, M.D. had 257 Medicare Part D claims for 62 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Wooin Ahn, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.