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DR. OBIOMA NNAMDI ONUORAH M.D.
NPI 1982706818
Internal Medicine - Nephrology in Kennewick, WA

Active since September 01, 2006PECOS EnrolledAccepts Medicare Assignment
521 N YOUNG ST, KENNEWICK, WA 99336(509) 585-5222(509) 585-5271 Get Directions Write a Review

NPPES record last updated: June 20, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Obioma Nnamdi Onuorah M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. OBIOMA NNAMDI ONUORAH M.D. (NPI 1982706818) is an individual nephrology provider in Kennewick, Washington, licensed in Oregon (MD26705) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Syringa General Hospital, and maintains a secondary practice location in Corvallis.

NPPES Registry Identity

NPI1982706818
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. OBIOMA NNAMDI ONUORAHCredential: M.D.
Location Address521 N YOUNG STKennewick, WA 99336-7806
Mailing AddressPo Box 6128Kennewick, WA 99336-0128 · (509) 737-1880 · Fax (509) 737-1879
Phone(509) 585-5222
Fax(509) 585-5271
Sole ProprietorNo
Medical School CMSOtherGraduated 1991
Enumeration DateSeptember 1, 2006
Last NPPES UpdateJune 20, 2022
NPPES CertifiedJune 20, 2022
✔ NPI 1982706818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses✔ Licensed in OR · MD26705✔ Licensed in WA · MD00043844
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedSpecialistTaxonomy 174400000X · License MD00043844 (WA)
521 N YOUNG ST, Kennewick, WA 99336
Open in Google Maps ↗

Secondary Practice Location 1

Location 13615 NW Samaritan Dr Ste 203Corvallis, OR 97330-3771 · Phone (541) 768-6930

Other Identifiers 1

Medicaid19827061818WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Obioma Nnamdi Onuorah M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6103724331
PECOS Enrollment IDI20041020000546
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Obioma Onuorah reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rcch Trios Health LLC
3.0 mi
Internal Medicine
3730 PLAZA WAY
Kennewick, WA 99338
  • Reassigned Medicare billing, Washington enrollment
  • 159 clinicians in this Medicare group
NPI 1831682806 (509) 221-6450
Tri-State Memorial Hospital
104 mi
Critical Access
1221 HIGHLAND AVE
Clarkston, WA 99403
  • Reassigned Medicare billing, Washington enrollment
  • Also billed through NPI 1598814352 (Washington)
  • 144 clinicians in this Medicare group
NPI 1760485221 (509) 758-5511
Multicare Health System
131 mi
Internal Medicine
400 E 5TH AVE
Spokane, WA 99202
  • Reassigned Medicare billing, Washington enrollment
  • 4,383 clinicians in this Medicare group
NPI 1730687161 (509) 838-2531
Legacy Good Samaritan Hospital And Medical Center
174 mi
General Acute Care Hospital
1015 NW 22ND AVE
Portland, OR 97210
  • Reassigned Medicare billing, Oregon enrollment
  • 387 clinicians in this Medicare group
NPI 1780608216 (503) 413-7711

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
562 services224 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
184 services21 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
131 services20 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
67 services53 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
34 services33 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
33 services18 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Syringa General Hospital

Critical Access Hospitals · Grangeville, ID
OwnershipGovernment - Hospital District or Authority
CMS Certification Number131315
Location607 W Main StreetGrangeville, ID 83530 · Idaho County
Emergency services

Clearwater Valley Hospital & Clinics

Critical Access Hospitals · Orofino, ID
OwnershipVoluntary non-profit - Private
CMS Certification Number131320
Location301 Cedar StreetOrofino, ID 83544 · Clearwater County
Emergency services

St Marys Hospital And Clinics

Critical Access Hospitals · Cottonwood, ID
OwnershipVoluntary non-profit - Private
CMS Certification Number131321
Location701 Lewiston StCottonwood, ID 83522 · Idaho County
Emergency services

Pullman Regional Hospital

Critical Access Hospitals · Pullman, WA
5/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number501331
Location835 S Bishop BlvdPullman, WA 99163 · Whitman County
Emergency services Birthing friendly

Tri-State Memorial Hospital

Critical Access Hospitals · Clarkston, WA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number501332
Location1221 Highland AvenueClarkston, WA 99403 · Asotin County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99336 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.99 typical visit price
range $57.27 – $172.80
Typical copayment $32.74 (range $14.31 – $43.20)
Most-billed visit code 99204
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers77 claims10,305 services$0.30 avg. paid by Medicare
Prednisone, immediate release or delayed release, oral, 1 mg J7512
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers52 claims6,990 services$0.01 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers51 claims6,840 services$0.18 avg. paid by Medicare
Mycophenolic acid, oral, 180 mg J7518
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers41 claims6,300 services$0.89 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
8 suppliers88 claims88 services$17.77 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
7 suppliers128 claims145 services$12.43 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MATTHEW KLATT
Student in an Organized Health Care Education/Training Program
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 221-5965
HIGH DESERT SURGERY CENTER, L.L.C.
Clinic/Center (Ambulatory Surgical)
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 586-2828
HETAL THAKOR DO
Student in an Organized Health Care Education/Training Program
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 221-5965
JENNIFER FOLLWELL DO
Family Medicine
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 221-5222
LYDIA SMITH DO
Student in an Organized Health Care Education/Training Program
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 221-5965
KMJ ANESTHESIA PLLC
Nurse Anesthetist, Certified Registered
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 736-2770
ELLEN T ANG M.D.
Specialist
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (509) 585-5222
TABITHA C LUSTIG NP
Nurse Practitioner (Family)
521 N YOUNG ST
KENNEWICK, WA 99336
Benton County (702) 896-2595

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Obioma Onuorah's NPI number?

The NPI number for Obioma Onuorah is 1982706818. It was assigned to this individual provider in the NPPES registry on September 1, 2006.

Where is Obioma Onuorah located?

Obioma Onuorah practices at 521 N Young St, Kennewick, WA 99336. The listed phone number is (509) 585-5222.

What is Obioma Onuorah's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Obioma Onuorah enrolled in Medicare?

Yes. Obioma Onuorah is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Obioma Onuorah's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Obioma Onuorah reassigns Medicare benefits to 4 organizations: Rcch Trios Health LLC (Kennewick, WA), Tri-State Memorial Hospital (Clarkston, WA), Multicare Health System (Spokane, WA) and Legacy Good Samaritan Hospital And Medical Center (Portland, OR). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Obioma Onuorah's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Obioma Onuorah accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Obioma Onuorah as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Obioma Onuorah affiliated with any hospitals?

According to CMS data, Obioma Onuorah is affiliated with Syringa General Hospital, Clearwater Valley Hospital & Clinics, St Marys Hospital And Clinics, Pullman Regional Hospital and Tri-State Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Obioma Onuorah was last updated on June 20, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.