Tammy Ezinne Onu
Physician Assistant · Clearlake, CA
Tammy Ezinne Onu is a physician assistant with a practice address in Clearlake, California, and NPI 1760997951, issued on Dec 9, 2017. Check the license (California 55190, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy Ezinne Onu
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 55190 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15230 Lakeshore Dr, Clearlake, CA 95422
- Phone
- (707) 995-4500
- Enumerated
- Dec 9, 2017
- Record last updated
- Dec 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (707) 995-2401
- Medicare enrollment
- Enrolled (PECOS I20180718001757); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 15230 Lakeshore Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marisol AguilarCommunity Health Worker1699411603
- Veronica ArroyoCommunity Health Worker1730710617
- Pari Azari, M.D.Interventional Pain Medicine Physician1942442132
- Arthur Bikangaga, MDSurgery Physician1952319030
- Jerylyn Bohlender, LCSWClinical Social Worker1750782488
- Daniel Boucher, MDFamily Medicine Physician1164115549
Verify Tammy Ezinne Onu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 55190Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average physician assistant in 2024
85 Medicare Part D claims for 58 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin33 claims
- Cephalexin18 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 one group practice
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy Ezinne Onu among 14,451 physician assistant records in California
Tammy Ezinne Onu is one of 14,451 physician assistant records with a practice address in California. 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 2017, is newer than 47% of them.
- NPI issued2017 · 47% of these records are older, 48% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2017 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 physician assistant records list a practice address in Clearlake
They are 7 of the 321 NPPES records with a practice address in Clearlake, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Clearlake → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Katarina Juhaszova, PA-CClearlake, CA 954221295137297
- Daniel Lowery, P.A.Clearlake, CA 954221275623324
- Jeffrey Meyers, PA-CClearlake, CA 954221457677841
- Thomas PickettClearlake, CA 954221407494818
- Putue Teh, PAClearlake, CA 954221235812264
- Alexis Thompson, PA-CClearlake, CA 954221588200463
- Carol Appel-Basham, P.ACovelo, CA 954281033375191
- Leila Cataldi, PA-CSanta Rosa, CA 954091700555299
Common questions
What is Tammy Ezinne Onu's NPI number?
Tammy Ezinne Onu's National Provider Identifier (NPI) is 1760997951, issued on Dec 9, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Ezinne Onu located?
The NPPES record lists a practice address at 15230 Lakeshore Dr, Clearlake, CA, 95422. Phone: (707) 995-4500. Providers update this record themselves, so call before visiting.
How can I verify Tammy Ezinne Onu's license?
NPPES lists California license number 55190, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy Ezinne Onu prescribe under Medicare Part D?
In 2024, Tammy Ezinne Onu had 85 Medicare Part D claims for 58 beneficiaries; the average among physician assistant prescribers was 830. 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.