John J. Hernandez, M.D.
Otolaryngology Physician · Westlake Village, CA
John J. Hernandez, M.D. is an otolaryngology physician with a practice address in Westlake Village, California, and NPI 1043363997, issued on Jan 22, 2007. Check the license (California G26992, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John J. Hernandez
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- G26992 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 LA Venta Drive, Suite 110, Westlake Village, CA 91361
- Phone
- (818) 889-3230
- Enumerated
- Jan 22, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 379-4733
- Medicare enrollment
- Enrolled (PECOS I20081117000484); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1973
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Verify John J. Hernandez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G26992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average otolaryngology physician in 2024
203 Medicare Part D claims for 119 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D.
Most prescribed
- Cefuroxime39 claims
- Mupirocin32 claims
- Triamcinolone Acetonide25 claims
- Azithromycin17 claims
- Nystatin13 claims
- Amoxicillin-Clavulanate Potass12 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.
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
John J. Hernandez among 1,212 otolaryngology physician records in California
John J. Hernandez, M.D. is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1973 · median 2004 among the 818 with a school on file
- Record last updated2007 · 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 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Westlake Village → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Soochuen Kho, M.D.Thousand Oaks, CA 913611881626661
- Jaesung Lee, M.D.Thousand Oaks, CA 913611376550715
- Kelvin Loh, M.D.Thousand Oaks, CA 913611326174509
- Andrew Mikaelian, M.D.Westlake Village, CA 913611891740973
- Abhay Vaidya, M.D.Thousand Oaks, CA 913611639186075
- Gary Voorman, M.D.Thousand Oaks, CA 913611093720419
- Oliver Gantz, M.D.Thousand Oaks, CA 913601952758260
- Natalie Kadin, MDThousand Oaks, CA 913601457594160
Common questions
What is John J. Hernandez, M.D.'s NPI number?
John J. Hernandez, M.D.'s National Provider Identifier (NPI) is 1043363997, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John J. Hernandez, M.D. located?
The NPPES record lists a practice address at 1250 LA Venta Drive, Suite 110, Westlake Village, CA, 91361. Phone: (818) 889-3230. Providers update this record themselves, so call before visiting.
How can I verify John J. Hernandez, M.D.'s license?
NPPES lists California license number G26992, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John J. Hernandez, M.D. prescribe under Medicare Part D?
In 2024, John J. Hernandez, M.D. had 203 Medicare Part D claims for 119 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is John J. Hernandez, M.D.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.