James Onorato, M.D., PH.D.
Internal Medicine Physician · Clarkston, WA
James Onorato, M.D., PH.D. is an internal medicine 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
- Internal Medicine Physician 207R00000X
- 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
- Record last updated
- Aug 12, 2024
- Medicaid IDs
- 2134378 WA
144651001 TX - Medicare enrollment
- Enrolled (PECOS I20190705001143); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 1119 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Merrill, D.O.Family Medicine Physician1992152326
- Donald Norman, MDGynecology 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
12% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,779 Medicare Part D claims for 346 beneficiaries, against an average of 3,176 among the 108,855 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 affiliation
- Tri-State Memorial HospitalClarkston, WA · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
James Onorato among 3,079 internal medicine physician records in Washington
James Onorato, M.D., PH.D. is one of 3,079 internal medicine physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1984 · median 2006 among the 1,852 with a school on file
- Record last updated2024 · 63% 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 Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Clarkston
They are 6 of the 408 NPPES records with a practice address in Clarkston, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Clarkston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohamad Altayeb Al-Hafez, MDClarkston, WA 994031265444723
- Nolan Derr, MDClarkston, WA 994031447782933
- Michael Minick, MDClarkston, WA 994031164536728
- Daniel Ryan, MDClarkston, WA 994031598393902
- Thomas Strobel, MDClarkston, WA 994031578581740
- Mohammed Omar Ahmed, M.DWalla Walla, WA 993621659756443
- Delwyn Baker, MDWalla Walla, WA 993621023108297
- Allison Bauer, MDWalla Walla, WA 993621801392279
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 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.