Antineoplastic AgentsCaspase 3Cisplatin
Dr. Leonard P. Rybak, MD
NPI1194710913
- Medicare services, 2017
- 86
- Part D claims, 2017
- 12
- Publications
- 42
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 701 N 1st St, Springfield, IL 62702
- Practice phone
- Call (217) 545-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Rybak'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. Leonard P. Rybak is an otolaryngologist in Springfield, Illinois
Dr. Rybak practices in Springfield, Illinois.
Dr. Rybak's NPI, 1194710913, was assigned on September 19, 2005. Dr. Rybak holds Illinois license 036061928.
NPI and contact details
- NPI
- 1194710913NPI Registry (opens in a new tab)
- NPI enumeration date
- September 19, 2005
- NPI status
- Active
- Practice phone
- (217) 545-8000
- 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. Leonard P. Rybak's practice address is in Springfield, Illinois
Dr. Rybak's practice address in the NPI Registry is 701 N 1st St, Springfield, IL 62702, in Sangamon County. The practice phone is (217) 545-8000.
- NPI Registry address701 N 1st St, Springfield, IL 62702 · Sangamon CountyPhone(217) 545-8000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Leonard P. Rybak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rybak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Rybak's practice | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Rybak practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Leonard P. Rybak is one of 401 otolaryngologists in Illinois
Otolaryngology is Dr. Rybak's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Rybak is licensed in Illinois.
Specialties and state licenses
- Otolaryngology, IllinoisPrimary
Otolaryngologists near Dr. Rybak
Counts of otolaryngologists 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. Leonard P. Rybak billed Medicare for 86 services in 2017
CMS data shows 86 Medicare services from Dr. Rybak across 3 procedure codes in 2017. Medicare paid $4,449 for them. Every service was in an office.
Medicare services, 201786
Paid by Medicare$4,449
Procedure codes3
Dr. Rybak's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 652017: 708%
- Surgery
- 2016: 242017: 1633%
Dr. Rybak compared with the Illinois median for otolaryngologists, 2017
- Dr. Rybak
- Illinois median
- Medicare services
- 86vs 60386% below
- Part D claims
- 12vs 16393% below
Medians across 384 otolaryngologists in Illinois with Dmand AI profiles that report each measure.
Dr. Rybak's most billed Medicare procedure codes, 2017
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. Rybak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rybak and other otolaryngologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leonard P. Rybak's patients have a median age of 49
Across all payers, Dmand AI patient panel data puts Dr. Rybak's median patient age at 49, with 60% women.
Dr. Rybak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Leonard P. Rybak wrote 12 Medicare Part D claims in 2017
In 2017, Dr. Rybak wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $48 in total drug cost. In 2016, CMS named 33 claims across 2 drugs.
Part D claims, 201712
Drugs named by CMS1
Total drug cost$48
Dr. Rybak's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 332017: 1264%
Drugs named by CMS: 1 in 2017, 2 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Find otolaryngologists like Dr. Rybak by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Leonard P. Rybak has 42 publications on record
Dmand AI links 42 papers to Dr. Rybak, published from 2006 to 2025. 2021 was the busiest year, with 6. The most frequent topics are Cisplatin, Hearing Loss and Antineoplastic Agents. Dr. Rybak has published most often in Antioxid Redox Signal. Dr. Rybak's most frequent co-authors are Michael Joel Brenner, MD, Rafael Antonio Brito and Chaitanya K. Mamillapalli, MD.
Papers42
Years published2006 to 2025
Dr. Rybak's papers by year, 2014 to 2025
Topics Dr. Rybak writes about most
- Cisplatin
- Hearing Loss
- Antineoplastic Agents
- Cochlea
- Rats, Wistar
- Reactive Oxygen Species
- Apoptosis
- STAT1 Transcription Factor
Dr. Rybak's most frequent co-authors
- Michael Joel Brenner, MD2 shared papers
- Rafael Antonio Brito2 shared papers
- Chaitanya K. Mamillapalli, MD2 shared papers
Recent publications by Dr. Rybak
Expert Opin Drug Metab Toxicol
Front Immunol
Chemokine CXCL1CisplatinHearing Loss
See who Dr. Rybak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Rybak works with, so you can find a warm path to the right otolaryngologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Leonard P. Rybak'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 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| 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. Leonard P. Rybak
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. Leonard P. Rybak's NPI number?
Dr. Leonard P. Rybak's NPI number is 1194710913. It was assigned on September 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard P. Rybak?
Dr. Leonard P. Rybak is an otolaryngologist in Springfield, Illinois. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Leonard P. Rybak practice?
Dr. Rybak practices at 701 N 1st St, Springfield, IL 62702.
What is Dr. Leonard P. Rybak's office phone number?
The practice phone on file for Dr. Rybak is (217) 545-8000.
What is Dr. Leonard P. Rybak's medical license number?
Dr. Rybak holds Illinois license 036061928.
Does Dr. Leonard P. Rybak accept Medicare?
Yes. CMS data shows Dr. Rybak billed Medicare for 86 services in 2017.
What services does Dr. Leonard P. Rybak bill to Medicare?
In 2017, Dr. Rybak's most billed Medicare services were office visit, established patient (99213), surgery: ear (69210) and office visit, new patient (99204).
What drugs does Dr. Leonard P. Rybak prescribe most?
In 2017 Medicare Part D data, Dr. Rybak's most prescribed drugs by claims were Ranitidine HCl.
How long has Dr. Leonard P. Rybak been practicing?
Dr. Rybak's NPI was assigned in 2005.
Does Dr. Leonard P. Rybak do research?
Dmand AI links 42 publications to Dr. Rybak, published from 2006 to 2025.
Who does Dr. Leonard P. Rybak publish with?
Dr. Rybak's most frequent co-authors are Michael Joel Brenner, MD (2 shared papers), Rafael Antonio Brito (2 shared papers) and Chaitanya K. Mamillapalli, MD (2 shared papers).
Selling to otolaryngology practices?
See otolaryngologists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card