Kristina Mai Nagai, DO
Internal Medicine Physician · Corvallis, OR
Kristina Mai Nagai, DO is an internal medicine physician with a practice address in Corvallis, Oregon, and NPI 1285192500, issued on Mar 5, 2019. Check the license (Oregon DO221284, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Kristina Mai Nagai
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- DO221284 OR
PG205383 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3521 NW Samaritan Dr Ste 201, Corvallis, OR 97330
- Phone
- (541) 768-5140
- Enumerated
- Mar 5, 2019
- Record last updated
- Jul 26, 2024
- Medicare enrollment
- Enrolled (PECOS I20240719002595); accepts Medicare assignment
- Medical or professional school
- Col Of Osteo Med Of The Pacific At Lebanon, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 3521 NW Samaritan Dr Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lynn Bentson, M.D, MACPInternal Medicine Physician1619916483
- Craig Brauer, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1790206100
- Courtney Chason, DOInternal Medicine Physician1053057091
- Skotti Church, M.DGeriatric Medicine (Internal Medicine) Physician1205060555
- Anne Marie Collum, DOInternal Medicine Physician1629463237
- Samantha Domingo, PSY.D.Psychologist1013336510
Verify Kristina Mai Nagai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO221284Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
374 Medicare Part D claims for 62 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium29 claims
- Levothyroxine Sodium21 claims
- Amlodipine Besylate20 claims
- Fluticasone-Salmeterol17 claims
- Lisinopril13 claims
- Pantoprazole Sodium12 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
- Good Samaritan Hospital CorvallisCorvallis, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristina Mai Nagai among 2,116 internal medicine physician records in Oregon
Kristina Mai Nagai, DO 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2021 · median 2008 among the 1,232 with a school on file
- Record last updated2024 · 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).
129 internal medicine physician records list a practice address in Corvallis
They are 129 of the 4,096 NPPES records with a practice address in Corvallis, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Corvallis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Steven Athay, M.D.Corvallis, OR 973301477502375
- Lynn Bentson, M.D, MACPCorvallis, OR 973301619916483
- Charlene Carroll, M.D.Corvallis, OR 973301275577769
- Brian Curtis, M.D.Corvallis, OR 973301245289115
- Ulrike Guempel, M.D.Corvallis, OR 973301912956897
- Kien Huynh, M.D.Corvallis, OR 973301619918034
- Janel Lawrence, M.D.Corvallis, OR 973301184673998
- Libor Pavlosek, M.D.Corvallis, OR 973301376510420
Common questions
What is Kristina Mai Nagai, DO's NPI number?
Kristina Mai Nagai, DO's National Provider Identifier (NPI) is 1285192500, issued on Mar 5, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Kristina Mai Nagai, DO located?
The NPPES record lists a practice address at 3521 NW Samaritan Dr Ste 201, Corvallis, OR, 97330. Phone: (541) 768-5140. Providers update this record themselves, so call before visiting.
How can I verify Kristina Mai Nagai, DO's license?
NPPES lists Oregon license number DO221284, 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 Kristina Mai Nagai, DO prescribe under Medicare Part D?
In 2024, Kristina Mai Nagai, DO had 374 Medicare Part D claims for 62 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.