John C. Kollar, DO
Surgery Physician · Saddle Brook, NJ
John C. Kollar, DO is a surgery physician with a practice address in Saddle Brook, New Jersey, and NPI 1841227352, issued on Jun 28, 2006. Check the license (New Jersey MB52216, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John C. Kollar
- Credential
- DO
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- MB52216 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 449B Market St, Saddle Brook, NJ 07663
- Phone
- (201) 712-7900
- Enumerated
- Jun 28, 2006
- Record last updated
- Jan 27, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (201) 712-7902
- Medicaid ID
- 5499208 NJ
- Medicare enrollment
- Enrolled (PECOS I20101004000119); accepts Medicare assignment
- Medical or professional school
- Rowan University School Of Osteopathic Medicine, 1987
- Entity
- Type 1 · individual
Verify John C. Kollar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license MB52216Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average surgery physician in 2024
100 Medicare Part D claims for 22 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam15 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: $44.70
1 payment: food and beverage; the largest payer was Seapearl East, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Bergen County Improvement AuthorityParamus, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Surgery Physician providers in New Jersey
There are 737 surgery physician records in New Jersey.
Other surgery physician records in New Jersey
- William Aarons, M.D.Atlantic City, NJ1972551240
- Alexander Abkin, MDFlorham Park, NJ1770564742
- Claude Abouchedid, MDTrenton, NJ1902981152
- Emeka Acholonu, M.DVoorhees, NJ1598944076
- Charles Adams, MDHackensack, NJ1366447203
- William Adams, MDNeptune, NJ1376522839
- Ayotunde Adeyeri, MDHolmdel, NJ1184869737
- Adebayo AdunbarinJersey City, NJ1497118368
- Justin Ady, M.D.New Brunswick, NJ1558664599
- Thomas Ahlborn, M.D.Glen Rock, NJ1801883277
Common questions
What is John C. Kollar, DO's NPI number?
John C. Kollar, DO's National Provider Identifier (NPI) is 1841227352, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John C. Kollar, DO located?
The NPPES record lists a practice address at 449B Market St, Saddle Brook, NJ, 07663. Phone: (201) 712-7900. Providers update this record themselves, so call before visiting.
How can I verify John C. Kollar, DO's license?
NPPES lists New Jersey license number MB52216, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John C. Kollar, DO prescribe under Medicare Part D?
In 2024, John C. Kollar, DO had 100 Medicare Part D claims for 22 beneficiaries; the average among surgery physician prescribers was 147. 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.