Kathryn L. Huyssoon, MD
Internal Medicine Physician · Gresham, OR
Kathryn L. Huyssoon, MD is an internal medicine physician with a practice address in Gresham, Oregon, and NPI 1023000387, issued on Aug 22, 2005. Check the license (Oregon MD17970, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Kathryn L. Huyssoon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD17970 OR
Self-reported in NPPES; status is on the state search - Practice location
- 24988 SE Stark St, Gresham, OR 97030
- Phone
- (503) 674-5818
- Enumerated
- Aug 22, 2005
- Record last updated
- Dec 19, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (503) 674-6709
- Medicaid ID
- 080697 OR
- Medicare enrollment
- Enrolled (PECOS I20101115000420); may accept Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 24988 SE Stark St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Fayyaz Mahmood, MDInternal Medicine Physician1790777050
- Mischelle McMillan, MDInternal Medicine Physician1851461990
Verify Kathryn L. Huyssoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD17970Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% more Medicare Part D claims than the average internal medicine physician in 2024
6,194 Medicare Part D claims for 387 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 338 claims were for opioids.
Most prescribed
- Atorvastatin Calcium460 claims
- Amlodipine Besylate339 claims
- Levothyroxine Sodium255 claims
- Rosuvastatin Calcium205 claims
- Losartan Potassium183 claims
- Omeprazole182 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.
Kathryn L. Huyssoon among 2,116 internal medicine physician records in Oregon
Kathryn L. Huyssoon, MD is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1993 · median 2008 among the 1,232 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 internal medicine physician records list a practice address in Gresham
They are 37 of the 1,934 NPPES records with a practice address in Gresham, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Gresham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joseph Acton, MDGresham, OR 970301861452765
- Deborah Alexander, MDGresham, OR 970301255369559
- Robert Bailey, MDGresham, OR 970301346288123
- Robert Bergstrom, MDGresham, OR 970301982660700
- Amy Chaumeton, M.D.Gresham, OR 970301033183918
- John Custis, MDGresham, OR 970301770561813
- Sunita Deshmukh, MDGresham, OR 970301730133679
- Michelle John, M.D.Gresham, OR 970301336108208
Common questions
What is Kathryn L. Huyssoon, MD's NPI number?
Kathryn L. Huyssoon, MD's National Provider Identifier (NPI) is 1023000387, issued on Aug 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn L. Huyssoon, MD located?
The NPPES record lists a practice address at 24988 SE Stark St, Gresham, OR, 97030. Phone: (503) 674-5818. Providers update this record themselves, so call before visiting.
How can I verify Kathryn L. Huyssoon, MD's license?
NPPES lists Oregon license number MD17970, 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 Kathryn L. Huyssoon, MD prescribe under Medicare Part D?
In 2024, Kathryn L. Huyssoon, MD had 6,194 Medicare Part D claims for 387 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.