Oliver Holger Gantz, M.D.
Otolaryngology Physician · Thousand Oaks, CA
Oliver Holger Gantz, M.D. is an otolaryngology physician with a practice address in Thousand Oaks, California, and NPI 1952758260, issued on May 17, 2016. Check the license (California 147332, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Oliver Holger Gantz
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- 147332 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Moody CT Ste 200, Thousand Oaks, CA 91360
- Phone
- (805) 418-3500
- Enumerated
- May 17, 2016
- Record last updated
- Sep 30, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200803001002); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 100 Moody CT Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Oliver Holger Gantz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 147332Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average otolaryngology physician in 2024
798 Medicare Part D claims for 310 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Ipratropium Bromide182 claims
- Fluticasone Propionate168 claims
- Azelastine Hcl141 claims
- Famotidine47 claims
- Pantoprazole Sodium23 claims
- Doxycycline Hyclate15 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 practice group's MIPS final score for 2023 (Medicare payment program): 86.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oliver Holger Gantz among 1,212 otolaryngology physician records in California
Oliver Holger Gantz, 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 2016, is newer than 84% of them.
- NPI issued2016 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2015 · median 2004 among the 818 with a school on file
- Record last updated2020 · 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 Thousand Oaks → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Natalie Kadin, MDThousand Oaks, CA 913601457594160
- Tom MaximThousand Oaks, CA 913601801356464
- Jeffrey Tseng, M.D.Thousand Oaks, CA 913601205990868
- John Hernandez, M.D.Westlake Village, CA 913611043363997
- 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
Common questions
What is Oliver Holger Gantz, M.D.'s NPI number?
Oliver Holger Gantz, M.D.'s National Provider Identifier (NPI) is 1952758260, issued on May 17, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Oliver Holger Gantz, M.D. located?
The NPPES record lists a practice address at 100 Moody CT Ste 200, Thousand Oaks, CA, 91360. Phone: (805) 418-3500. Providers update this record themselves, so call before visiting.
How can I verify Oliver Holger Gantz, M.D.'s license?
NPPES lists California license number 147332, 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 Oliver Holger Gantz, M.D. prescribe under Medicare Part D?
In 2024, Oliver Holger Gantz, M.D. had 798 Medicare Part D claims for 310 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Oliver Holger Gantz, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.3 of 100, reported for the practice group. 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.