Dr. John C. Kollar, DO
- Medicare services, 2024
- 100
- Medicare patients, 2024
- 63
- Part D claims, 2024
- 100
- Hospital affiliations
- 1
- Industry payments
- $7,661
- Practice address
- 230 East Ridgewood Ave, Paramus, NJ 07652
- Practice phone
- Call (201) 967-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kollar's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John C. Kollar is a general surgeon in Paramus, New Jersey
Dr. Kollar practices at Bergen New Bridge Medical Center in Paramus, New Jersey, part of Bergen County, New Jersey.
Dr. Kollar's NPI, 1841227352, was assigned on June 28, 2006. Dr. Kollar graduated from Rowan University School of Osteopathic Medicine in 1987. Dr. Kollar holds New Jersey license MB52216.
- NPI
- 1841227352NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951593409
- NPI enumeration date
- June 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (201) 967-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John C. Kollar practices at Bergen New Bridge Medical Center in Paramus, New Jersey
Dr. Kollar's primary practice is Bergen New Bridge Medical Center, at 230 East Ridgewood Ave, Paramus, NJ 07652 in Bergen County. The practice phone is (201) 967-4000.
- Bergen New Bridge Medical Center230 East Ridgewood Ave, Paramus, NJ 07652 · Bergen CountyPhone(201) 967-4000
Source: Dmand AI Affiliation Data
Dr. John C. Kollar is affiliated with 2 sites of care and 2 medical groups
Dr. Kollar's primary practice is Bergen New Bridge Medical Center in Paramus, New Jersey, part of Bergen County, New Jersey. The medical group on file is Bergen New Bridge Medical Center. Dmand AI also links Dr. Kollar to 1 more physician office and 1 medical group, each named with a free account. Dr. Kollar's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John C. Kollar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kollar practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bergen New Bridge Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Bergen County, New Jersey and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John C. Kollar is one of 675 general surgeons in New Jersey
Surgery is Dr. Kollar's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Kollar is licensed in New Jersey.
Specialties and state licenses
- Surgery, New JerseyPrimary
General surgeons near Dr. Kollar
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John C. Kollar billed Medicare for 100 services in 2024
CMS data shows 100 Medicare services from Dr. Kollar across 5 procedure codes in 2024, for 63 Medicare patients. Medicare paid $10,031 for them.
Dr. Kollar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1132024: 10012%
Where Dr. Kollar's Medicare services took place, 2024
- In an office3434%
- In a facility6666%
Dr. Kollar compared with the New Jersey median for general surgeons, 2024
- Dr. Kollar
- New Jersey median
- Medicare services
- 100vs 17041% below
- Medicare patients
- 63vs 12550% below
- Part D claims
- 15vs 2744% below
Medians across 630 general surgeons in New Jersey with Dmand AI profiles that report each measure.
Dr. Kollar's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Kollar?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kollar and other general surgeons in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Kollar treated 63 Medicare patients in 2024, average age 70
CMS counts 63 Medicare patients who saw Dr. Kollar in 2024. The largest group is 65 to 74, with 22 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 43% are also on Medicaid. Their average risk score is 1.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kollar's median patient age at 56, with 51% women.
Dr. Kollar's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kollar's Medicare patients by sex, 2024
- Women3657%
- Men2743%
Chronic conditions among Dr. Kollar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Mood disorders49%
- Ischemic heart disease40%
- Diabetes38%
- Anxiety37%
- Depression35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kollar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women51%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John C. Kollar wrote 100 Medicare Part D claims in 2024
In 2024, Dr. Kollar wrote 100 Medicare Part D claims for 22 patients. 85% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $267 in total drug cost. In 2022, CMS named 12 claims across 1 drug.
Dr. Kollar's Part D claims by kind of drug, 2024
- Generic85 claims85%
- Brand-name and other15 claims15%
Dr. Kollar's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 122024: 1525%
Drugs named by CMS: 1 in 2024, 1 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. John C. Kollar takes part in Medicare
Dr. Kollar accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John C. Kollar received $7,661 in industry payments from 2016 to 2025
CMS Open Payments shows 38 general payments to Dr. Kollar from 13 drug and device companies from 2016 to 2025. Education make up the largest share, 57% of the total. Intuitive Surgical, Inc. paid the most, $6,516.
General payments to Dr. Kollar by program year, 2016 to 2025
General payments to Dr. Kollar by kind, 2016 to 2025
- Education$4,37957%
- Travel and lodging$2,27830%
- Food and beverage$1,00313%
Companies that paid Dr. Kollar the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John C. Kollar graduated from Rowan University School of Osteopathic Medicine
Dr. Kollar graduated from Rowan University School of Osteopathic Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John C. Kollar's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John C. Kollar
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John C. Kollar's NPI number?
Dr. John C. Kollar's NPI number is 1841227352. It was assigned on June 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Kollar?
Dr. John C. Kollar is a general surgeon in Paramus, New Jersey. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John C. Kollar practice?
Dr. Kollar practices at 230 East Ridgewood Ave, Paramus, NJ 07652. Dr. Kollar's primary practice is Bergen New Bridge Medical Center in Paramus, New Jersey, part of Bergen County, New Jersey. Dmand AI also links Dr. Kollar to 1 physician office and 1 medical group.
What is Dr. John C. Kollar's office phone number?
The practice phone on file for Dr. Kollar is (201) 967-4000.
What is Dr. John C. Kollar's medical license number?
Dr. Kollar holds New Jersey license MB52216.
Which hospitals is Dr. John C. Kollar affiliated with?
Dr. Kollar practices at Bergen New Bridge Medical Center in Paramus, New Jersey.
What medical group is Dr. John C. Kollar part of?
Dr. Kollar is linked to Bergen New Bridge Medical Center. Dmand AI links Dr. Kollar to 1 more medical group.
Does Dr. John C. Kollar accept Medicare?
Yes. CMS data shows Dr. Kollar billed Medicare for 100 services in 2024, and Dr. Kollar accepts Medicare assignment.
How many Medicare patients does Dr. John C. Kollar see?
CMS counts 63 Medicare patients who saw Dr. Kollar in 2024, with an average age of 70.
What services does Dr. John C. Kollar bill to Medicare?
In 2024, Dr. Kollar's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and hospital inpatient care (99223).
Show 4 more questionsShow fewer questions
Where did Dr. John C. Kollar go to medical school?
Dr. Kollar graduated from Rowan University School of Osteopathic Medicine in 1987.
What drugs does Dr. John C. Kollar prescribe most?
In 2024 Medicare Part D data, Dr. Kollar's most prescribed drugs by claims were Alprazolam.
Has Dr. John C. Kollar received payments from drug or device companies?
CMS Open Payments shows $7,661 in general payments to Dr. Kollar from 13 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John C. Kollar been practicing?
Dr. Kollar graduated from medical school in 1987, 39 years ago.
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