James Onorato, M.D., PH.D.
Nephrology Physician · Clarkston, WA
James Onorato, M.D., PH.D. is a nephrology physician with a practice address in Clarkston, Washington, and NPI 1679504559, issued on Jul 6, 2006. Check the license on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- James Onorato
- Credential
- M.D., PH.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- K3367 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1119 Highland Ave, Clarkston, WA 99403
- Phone
- (509) 758-5511
- Enumerated
- Jul 6, 2006
- Entity
- Type 1 · individual
Also registered at 1119 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kenneth Berger, MDUrology Physician1366407942
- Dezirae Berry, NP-CFamily Nurse Practitioner1740994268
- Nolan Derr, MDInternal Medicine Physician1447782933
- Laure Larsen, ARNPPrimary Care Nurse Practitioner1154086429
- John Merrill, D.O.Family Medicine Physician1992152326
- Donald Norman, MDObstetrics & Gynecology Physician1376866590
Verify James Onorato in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical CommissionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
84% more Medicare Part D claims than the average nephrology physician in 2024
2,779 Medicare Part D claims for 346 beneficiaries, against an average of 1,511 among the 8,473 providers of this specialty who prescribed in Part D.
Most prescribed
- Furosemide185 claims
- Losartan Potassium172 claims
- Amlodipine Besylate164 claims
- Spironolactone151 claims
- Lisinopril146 claims
- Doxazosin Mesylate112 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.
One hospital or facility affiliation
- Tri-State Memorial HospitalClarkston, WA · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Nephrology Physician providers in Washington
There are 206 nephrology physician records in Washington.
Other nephrology physician records in Washington
- Samer Abdulkhalek, MDSpokane, WA1205321262
- Christine Abrass, MDMercer Island, WA1578645529
- Suhail AhmadSeattle, WA1821173659
- Razan Al Kudsi, MDBurien, WA1497790687
- Astier Alem, MDKirkland, WA1801849948
- Osama Amro, MD., MSSeattle, WA1154642643
- Arthur Anderson, M.D.Bellevue, WA1174529341
- Ramon Anel, MDTacoma, WA1467547711
- Julia Anuras, MDOlympia, WA1578536496
- Joseph Anzalone, MDWenatchee, WA1942237649
Common questions
What is James Onorato, M.D., PH.D.'s NPI number?
James Onorato, M.D., PH.D.'s National Provider Identifier (NPI) is 1679504559, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Onorato, M.D., PH.D. located?
The NPPES record lists a practice address at 1119 Highland Ave, Clarkston, WA, 99403. Phone: (509) 758-5511. Providers update this record themselves, so call before visiting.
How can I verify James Onorato, M.D., PH.D.'s license?
Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Onorato, M.D., PH.D. prescribe under Medicare Part D?
In 2024, James Onorato, M.D., PH.D. had 2,779 Medicare Part D claims for 346 beneficiaries; the average among nephrology physician prescribers was 1,511. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.