Thomas John Horn, M.D.
Adult Reconstructive Orthopaedic Surgery Physician · Ventura, CA
Thomas John Horn, M.D. is an adult reconstructive orthopaedic surgery physician with a practice address in Ventura, California, and NPI 1194781005, issued on Apr 21, 2006. Check the license (California G68161, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas John Horn
- Credential
- M.D.
- Primary taxonomy
- Adult Reconstructive Orthopaedic Surgery Physician 207XS0114X
- License number
- G68161 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3525 Loma Vista RD Ste A, Ventura, CA 93003
- Phone
- (805) 641-6415
- Enumerated
- Apr 21, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (805) 641-6424
- Entity
- Type 1 · individual
8 nearest adult reconstructive orthopaedic surgery physician records → All 147 in California → Look up another NPI →
Also registered at 3525 Loma Vista RD Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Amis, PA-CPhysician Assistant1730653866
- Hossein Aziz, D.O.Orthopaedic Surgery of the Spine Physician1790167054
- Gabriel Gluck, M.D.Orthopaedic Surgery Physician1619975679
- Joshua Gluck, MDOrthopaedic Hand Surgery Physician1538336573
- Jason Hofer, MDOrthopaedic Surgery Physician1962681718
- Sean Husted, PA-CPhysician Assistant1891144952
Verify Thomas John Horn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G68161Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average adult reconstructive orthopaedic surgery physician in 2024
16 Medicare Part D claims, against an average of 579 among the 1,112 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Thomas John Horn among 147 adult reconstructive orthopaedic surgery physician records in California
Thomas John Horn, M.D. is one of 147 adult reconstructive orthopaedic surgery physician records with a practice address in California. 88% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 68% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2023 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0114X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Reconstructive Orthopaedic Surgery Physician providers in California
There are 147 adult reconstructive orthopaedic surgery physician records in California.
All 147 in California → Every provider in Ventura → Adult Reconstructive Orthopaedic Surgery Physician nationwide →
The 8 adult reconstructive orthopaedic surgery physician records with the nearest ZIP codes
- Mary Ragsdale, M.D.Ventura, CA 930031295977957
- Mario Vargas-Vila, MD, PHDVentura, CA 930031134501307
- Robert O'Hollaren, M.D.Ventura, CA 930011801852710
- Craig Zeman, M.D.Oxnard, CA 930301710943618
- Gary Bradley, MDSanta Barbara, CA 931011386756724
- Ryan Digiovanni, MDOrange, CA 928681720440951
- Bang Hoang, MDOrange, CA 928681568542629
- Peter Hsiue, M.D.Orange, CA 928681679935944
Common questions
What is Thomas John Horn, M.D.'s NPI number?
Thomas John Horn, M.D.'s National Provider Identifier (NPI) is 1194781005, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas John Horn, M.D. located?
The NPPES record lists a practice address at 3525 Loma Vista RD Ste A, Ventura, CA, 93003. Phone: (805) 641-6415. Providers update this record themselves, so call before visiting.
How can I verify Thomas John Horn, M.D.'s license?
NPPES lists California license number G68161, 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 Thomas John Horn, M.D. prescribe under Medicare Part D?
In 2024, Thomas John Horn, M.D. had 16 Medicare Part D claims; the average among adult reconstructive orthopaedic surgery physician prescribers was 579. 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.