Catherine K. Park Leonard, MD
Radiation Oncology Physician · Barrington, IL
Catherine K. Park Leonard, MD is a radiation oncology physician with a practice address in Barrington, Illinois, and NPI 1710149968, issued on Jun 30, 2008. Check the license (Illinois 036131497, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Catherine K. Park Leonard
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 036131497 IL
Self-reported in NPPES; status is on the state search - Practice location
- 27750 W Highway 22, Barrington, IL 60010
- Phone
- (847) 842-0300
- Enumerated
- Jun 30, 2008
- Record last updated
- Dec 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (847) 842-0370
- Medicaid ID
- 036131497 IL
- Medicare enrollment
- Enrolled (PECOS I20130215000529); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 27750 W Highway 22
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine K. Park Leonard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036131497Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average radiation oncology physician in 2024
72 Medicare Part D claims for 48 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 13 claims were for opioids.
Most prescribed
- Tamsulosin Hcl20 claims
- Dexamethasone15 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $228.69
4 payments; by number, the most common kind was food and beverage; the largest payer was Elekta, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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
- Radiation Oncology Consultants, LtdBarrington, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Radiation Oncology Physician providers in Illinois
There are 277 radiation oncology physician records in Illinois.
Other radiation oncology physician records in Illinois
- Mohamed Abazeed, MD, PHDChicago, IL1205096609
- Christopher Abraham, MDSpringfield, IL1083900294
- Ross Abrams, M.D.Chicago, IL1356317564
- Iftekhar Ahmad, M.D.Rockford, IL1164641791
- Elke Aippersbach, M.D.,M.SC.,Oak Lawn, IL1285754895
- Adil Akthar, M.D.Warrenville, IL1598175531
- Neal Andruska, MD, PHDWarrenville, IL1972035798
- Sobiya Ansari, M.D.Chicago, IL1336554666
- Muzamil Arshad, MD/PHDChicago, IL1518429570
- Guhan Arumugam Shanmugasundaram, M.B.B.S.Chicago, IL1023800943
Common questions
What is Catherine K. Park Leonard, MD's NPI number?
Catherine K. Park Leonard, MD's National Provider Identifier (NPI) is 1710149968, issued on Jun 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Catherine K. Park Leonard, MD located?
The NPPES record lists a practice address at 27750 W Highway 22, Barrington, IL, 60010. Phone: (847) 842-0300. Providers update this record themselves, so call before visiting.
How can I verify Catherine K. Park Leonard, MD's license?
NPPES lists Illinois license number 036131497, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine K. Park Leonard, MD prescribe under Medicare Part D?
In 2024, Catherine K. Park Leonard, MD had 72 Medicare Part D claims for 48 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Catherine K. Park Leonard, MD's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.