Louis Clement Zanger, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Saratoga, CA
Louis Clement Zanger, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Saratoga, California, and NPI 1306218052, issued on Oct 21, 2015. Check the license (California A18803, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Louis Clement Zanger
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- A18803 CA
Self-reported in NPPES; status is on the state search - Practice location
- 13313 Via Madronas Dr., Saratoga, CA 95070
- Phone
- (408) 867-3645
- Enumerated
- Oct 21, 2015
- Record last updated
- Oct 21, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Verify Louis Clement Zanger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A18803Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
36 Medicare Part D claims, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
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.
Louis Clement Zanger among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
Louis Clement Zanger, M.D. is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician 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 2015, is newer than 86% of them.
- NPI issued2015 · 86% of these records are older, 10% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Saratoga → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Noel Fishman, M.D.Santa Cruz, CA 950651447230511
- Surindra Mitruka, MDSanta Cruz, CA 950651861590382
- Bilal Shafi, MDSanta Cruz, CA 950651306923123
- Richard Bloom, MDSanta Clara, CA 950511104903053
- Alex Dalal, MDSanta Clara, CA 950511710411756
- Sumanth Kidambi, MDSanta Clara, CA 950511053722363
- Alexander Moskovitz, MDSanta Clara, CA 950511447339585
- Shawn Purnell, M.D.Santa Clara, CA 950511235587072
Common questions
What is Louis Clement Zanger, M.D.'s NPI number?
Louis Clement Zanger, M.D.'s National Provider Identifier (NPI) is 1306218052, issued on Oct 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Louis Clement Zanger, M.D. located?
The NPPES record lists a practice address at 13313 Via Madronas Dr., Saratoga, CA, 95070. Phone: (408) 867-3645. Providers update this record themselves, so call before visiting.
How can I verify Louis Clement Zanger, M.D.'s license?
NPPES lists California license number A18803, 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 Louis Clement Zanger, M.D. prescribe under Medicare Part D?
In 2024, Louis Clement Zanger, M.D. had 36 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.