Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Obioma Nnamdi Onuorah, MD

Individual provider Nephrology Physician · NPI 1982706818

Dr. Obioma Nnamdi Onuorah, MD practises Nephrology in Kennewick, Washington. Qualified in 1991, 35 years ago. Practices with Tri-State Memorial Hospital, a 34-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Oregon and Washington.

Years since qualifying
35
Licensed in
OR, WA
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

521 N Young St
Kennewick, WA 99336-7806
Phone: (509) 585-5222
Fax: (509) 585-5271
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3615 Nw Samaritan Dr Ste 203, Corvallis, OR 97330-3771 — (541) 768-6930

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence MD26705 (OR)
Nephrology Physician Taxonomy 207RN0300X · Licence MD00043844 (WA)
Specialist Taxonomy 174400000X · Licence MD00043844 (WA)

Record details

NPI number1982706818
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 1, 2006
Last updated in NPPESJune 20, 2022
Certification dateJune 20, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1991 (35 years in practice)
Group practice Tri-State Memorial Hospital — 34 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients294
Services billed 1,372 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $190 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Tri-State Memorial Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 34 clinicians in the practice; 12 are shown here.

Other providers in Kennewick