Jon William Mares, D.O.
Nephrology Physician · Covington, LA
Jon William Mares, D.O. is a nephrology physician with a practice address in Covington, Louisiana, and NPI 1023375300, issued on Apr 11, 2012. Check the license on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Jon William Mares
- Credential
- D.O.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 036.151545 IL
Q6769 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1970 N Highway 190, Covington, LA 70433
- Phone
- (985) 867-8585
- Enumerated
- Apr 11, 2012
- Record last updated
- Sep 17, 2025
- Fax
- (985) 867-3644
- Medicare enrollment
- Enrolled (PECOS I20210713001349); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Physicians And Surgeons, 2012
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 219 in Louisiana → Look up another NPI →
Also registered at 1970 N Highway 190
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Angelo, MDNephrology Physician1538143599
- Kristine Barr, FNPFamily Nurse Practitioner1790335313
- Krystal Bosio, APRNFamily Nurse Practitioner1093695652
- Molly Broom, FNPFamily Nurse Practitioner1285120808
- Nicholas Giordano, NPAcute Care Nurse Practitioner1376181198
- Jacques Guillot, MDInternal Medicine Physician1881706778
Verify Jon William Mares in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average nephrology physician in 2024
132 Medicare Part D claims for 31 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate20 claims
- Olmesartan Medoxomil13 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.
Industry payments in 2024: $81.69
4 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Nni Covington LLCCovington, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jon William Mares among 219 nephrology physician records in Louisiana
Jon William Mares, D.O. is one of 219 nephrology physician records with a practice address in Louisiana. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 76% of them.
- NPI issued2012 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2012 · median 2001 among the 172 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Louisiana
There are 219 nephrology physician records in Louisiana.
All 219 in Louisiana → Every provider in Covington → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- John Angelo, MDCovington, LA 704331538143599
- Brandon Bean, MDCovington, LA 704331356427199
- Tammy Do, MDCovington, LA 704331013596436
- Melissa Inman, MDCovington, LA 704331750608006
- M. Napier, M.D.Covington, LA 704331609841428
- Imran Shuja, M.D.Covington, LA 704331922493030
- John Simon, MDCovington, LA 704331760489892
- Peter Van, MDCovington, LA 704331134330400
Common questions
What is Jon William Mares, D.O.'s NPI number?
Jon William Mares, D.O.'s National Provider Identifier (NPI) is 1023375300, issued on Apr 11, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Jon William Mares, D.O. located?
The NPPES record lists a practice address at 1970 N Highway 190, Covington, LA, 70433. Phone: (985) 867-8585. Providers update this record themselves, so call before visiting.
How can I verify Jon William Mares, D.O.'s license?
Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jon William Mares, D.O. prescribe under Medicare Part D?
In 2024, Jon William Mares, D.O. had 132 Medicare Part D claims for 31 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.