Chronic PainCross-Over StudiesDelayed-Action Preparations
Dr. Robert J. Buynak, MD
NPI1508977984
- Part D claims, 2024
- 32
- Publications
- 5
- Clinical trials
- 6
- Industry payments
- $26,075
- State license
- 1
- Practice address
- 4201 W Medical Center Dr, Mchenry, IL 60050
- Practice phone
- Call (219) 462-7173
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Buynak's professional email, personal email and mobile number
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Dr. Robert J. Buynak is an internist in Mchenry, Illinois
Dr. Buynak practices in Mchenry, Illinois.
Dr. Buynak's NPI, 1508977984, was assigned on August 31, 2006. Dr. Buynak holds Indiana license 01048425A.
NPI and contact details
- NPI
- 1508977984NPI Registry (opens in a new tab)
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Practice phone
- (219) 462-7173
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Robert J. Buynak's practice address is in Mchenry, Illinois
Dr. Buynak's practice address in the NPI Registry is 4201 W Medical Center Dr, Mchenry, IL 60050, in Mchenry County. The practice phone is (219) 462-7173.
- NPI Registry address4201 W Medical Center Dr, Mchenry, IL 60050 · Mchenry CountyPhone(219) 462-7173
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Robert J. Buynak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Buynak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Buynak's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert J. Buynak is one of 5,652 internists in Illinois
Internal medicine is Dr. Buynak's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Buynak is licensed in Indiana.
Specialties and state licenses
- Internal medicine, IndianaPrimary
Internists near Dr. Buynak
Counts of internists 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. Robert J. Buynak's patients have a median age of 85
Across all payers, Dmand AI patient panel data puts Dr. Buynak's median patient age at 85, with 100% women.
Dr. Buynak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 85
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Robert J. Buynak wrote 32 Medicare Part D claims in 2024
In 2024, Dr. Buynak wrote 32 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $241 in total drug cost. In 2018, CMS named 64 claims across 5 drugs.
Part D claims, 202432
Drugs named by CMS1
Total drug cost$241
Dr. Buynak's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 642019: 1478%
Drugs named by CMS: 1 in 2019, 5 in 2018.
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
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Dr. Robert J. Buynak has 5 publications on record
Dmand AI links 5 papers to Dr. Buynak, published from 2014 to 2024. The most frequent topics are Acrylates, Aminoisobutyric Acids and Antiviral Agents. Dr. Buynak's most frequent co-authors are Parvez S. Mantry, MD, Kevin D. Cannon, MD and Paul J. Pockros, MD.
Papers5
Years published2014 to 2024
Dr. Buynak's papers by year, 2014 to 2024
Topics Dr. Buynak writes about most
- Acrylates
- Aminoisobutyric Acids
- Antiviral Agents
- Benzimidazoles
- Delayed-Action Preparations
- Drug Therapy, Combination
- Hepatitis C, Chronic
- Leucine
Dr. Buynak's most frequent co-authors
- Parvez S. Mantry, MD2 shared papers
- Kevin D. Cannon, MD1 shared paper
- Paul J. Pockros, MD1 shared paper
Recent publications by Dr. Buynak
AcrylatesAminoisobutyric AcidsAntiviral Agents
Expert Opin Pharmacother
Delayed-Action PreparationsDouble-Blind MethodLow Back Pain
Eur J Gastroenterol Hepatol
AcrylatesAminoisobutyric AcidsAntiviral Agents
See who Dr. Buynak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Buynak works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert J. Buynak has worked on 6 clinical trials
Dmand AI links Dr. Buynak to 6 clinical trials. Conditions studied include Diabetes Mellitus, Type 2, Osteoarthritis and Pulmonary Disease, Chronic Obstructive. Open Payments lists research payments to Dr. Buynak that name 3 trials.
Clinical trials with Dr. Buynak by phase
- NonePhase 1: no trials
- 1Phase 1/2: 1 trial
- NonePhase 2: no trials
- 1Phase 3: 1 trial
- NonePhase 4: no trials
Conditions in Dr. Buynak's trials
- Diabetes Mellitus, Type 2
- Osteoarthritis
- Pulmonary Disease, Chronic Obstructive
- Renal Insufficiency, Chronic
- Severe Acute Respiratory Syndrome
Investigators on the most trials with Dr. Buynak
- Mohammed A. Allaw, MD2 shared trials
- Kevin D. Cannon, MD2 shared trials
- David L. Fried, MD2 shared trials
Recent clinical trials with Dr. Buynak
20 valent pneumococcal conjugate vaccine24 valent pneumococcal conjugate vaccine
Mepolizumab as Add-on Treatment IN Participants With COPD Characterized by Frequent Exacerbations and Eosinophil Level (opens in a new tab)
CompletedPhase 3
Pulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveMepolizumab
Severe Acute Respiratory SyndromeCOVID-19SARS-CoV-2 rS/Matrix-M1 Adjuvant (Booster Vaccination)SARS-CoV-2 rS/Matrix-M1 Adjuvant (Crossover Vaccination period)SARS-CoV-2 rS/Matrix-M1 Adjuvant (Initial Vaccination Period)
$195 in research paymentsRenal Insufficiency, ChronicRenal InsufficiencySotagliflozin
$1,270 in research paymentsOsteoarthritisRheumatic DiseasesFasinumab
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Robert J. Buynak received $26,075 in industry payments from 2016 to 2025
CMS Open Payments shows 150 general payments to Dr. Buynak from 15 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 72% of the total. Novo Nordisk AS paid the most, $5,387. It also lists 60 research payments totaling $48,978 from 2016 to 2023, naming 3 clinical trials.
General payments to Dr. Buynak by program year, 2016 to 2025
General payments to Dr. Buynak by kind, 2016 to 2025
$26.1Kin total
- Travel and lodging$18,71972%
- Food and beverage$6,57925%
- Speaker and faculty fees$7773%
Companies that paid Dr. Buynak the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Robert J. Buynak'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Robert J. Buynak
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. Robert J. Buynak's NPI number?
Dr. Robert J. Buynak's NPI number is 1508977984. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert J. Buynak?
Dr. Robert J. Buynak is an internist in Mchenry, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Robert J. Buynak practice?
Dr. Buynak practices at 4201 W Medical Center Dr, Mchenry, IL 60050.
What is Dr. Robert J. Buynak's office phone number?
The practice phone on file for Dr. Buynak is (219) 462-7173.
What is Dr. Robert J. Buynak's medical license number?
Dr. Buynak holds Indiana license 01048425A.
What drugs does Dr. Robert J. Buynak prescribe most?
In 2019 Medicare Part D data, Dr. Buynak's most prescribed drugs by claims were Glimepiride.
Has Dr. Robert J. Buynak received payments from drug or device companies?
CMS Open Payments shows $26,075 in general payments to Dr. Buynak from 15 companies from 2016 to 2025. The largest total came from Novo Nordisk AS.
How long has Dr. Robert J. Buynak been practicing?
Dr. Buynak's NPI was assigned in 2006.
Does Dr. Robert J. Buynak do research?
Dmand AI links 5 publications to Dr. Buynak, published from 2014 to 2024. Dr. Buynak has worked on 6 clinical trials.
Who does Dr. Robert J. Buynak publish with?
Dr. Buynak's most frequent co-authors are Parvez S. Mantry, MD (2 shared papers), Kevin D. Cannon, MD (1 shared paper) and Paul J. Pockros, MD (1 shared paper).
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