Margaret Nduta Njonjo, M.D.
Geriatric Medicine (Internal Medicine) Physician · Eugene, OR
Margaret Nduta Njonjo, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Eugene, Oregon, and NPI 1427239334, issued on Nov 19, 2007. Check the license (Oregon MD150253, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Margaret Nduta Njonjo
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- MD150253 OR
Self-reported in NPPES; status is on the state search - Practice location
- 4010 Aerial Way, Eugene, OR 97402
- Phone
- (541) 242-8300
- Enumerated
- Nov 19, 2007
- Record last updated
- Sep 21, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110127001215); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2005
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 67 in Oregon → Look up another NPI →
Also registered at 4010 Aerial Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tamara Barstow, M.D.Pediatrics Physician1184696924
- Jeffrey Baxter, M.D.Family Medicine Physician1053383893
- Paul Benda, M.D.Pediatrics Physician1790757557
- Christopher Bolz, M.D.Family Medicine Physician1922070606
- Kari Cox, R.D.Registered Dietitian1033144803
Verify Margaret Nduta Njonjo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD150253Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average geriatric medicine (internal medicine) physician in 2024
11,812 Medicare Part D claims for 813 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 470 claims were for opioids.
Most prescribed
- Atorvastatin Calcium607 claims
- Levothyroxine Sodium591 claims
- Amlodipine Besylate482 claims
- Losartan Potassium398 claims
- Lisinopril383 claims
- Gabapentin320 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 2 group practices
- PeacehealthEugene, OR
- Peacehealth Medical GroupEugene, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Nduta Njonjo among 67 geriatric medicine (internal medicine) physician records in Oregon
Margaret Nduta Njonjo, M.D. is one of 67 geriatric medicine (internal medicine) physician records with a practice address in Oregon. 61% 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 60% of them.
- NPI issued2007 · 60% of these records are older, 33% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 36% of these records are
- Graduated2005 · median 2007 among the 24 with a school on file
- Record last updated2010 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Oregon
There are 67 geriatric medicine (internal medicine) physician records in Oregon.
All 67 in Oregon → Every provider in Eugene → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Jennifer Lamberg, M.D.Eugene, OR 974021548237332
- Allison Scarborough, M.D.Eugene, OR 974011700853827
- Gary Glasser, M.D.Eugene, OR 974041417969312
- John Roberts, M.D.Eugene, OR 974041255414785
- Jitendra Patel, MDBrookings, OR 974151588668230
- Palak Patel, MDBrookings, OR 974151922367572
- Aruna Jayaram, M.DRoseburg, OR 974711720308620
- Skotti Church, M.DCorvallis, OR 973301205060555
Common questions
What is Margaret Nduta Njonjo, M.D.'s NPI number?
Margaret Nduta Njonjo, M.D.'s National Provider Identifier (NPI) is 1427239334, issued on Nov 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Nduta Njonjo, M.D. located?
The NPPES record lists a practice address at 4010 Aerial Way, Eugene, OR, 97402. Phone: (541) 242-8300. Providers update this record themselves, so call before visiting.
How can I verify Margaret Nduta Njonjo, M.D.'s license?
NPPES lists Oregon license number MD150253, 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 Margaret Nduta Njonjo, M.D. prescribe under Medicare Part D?
In 2024, Margaret Nduta Njonjo, M.D. had 11,812 Medicare Part D claims for 813 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.