Katherine Sonya Ritter, MD
Family Medicine Physician · Bolingbrook, IL
Katherine Sonya Ritter, MD is a family medicine physician with a practice address in Bolingbrook, Illinois, and NPI 1255694691, issued on Jun 20, 2012. Check the license (Illinois 036136590, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Katherine Sonya Ritter
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036136590 IL
Self-reported in NPPES; status is on the state search - Practice location
- 149 N Weber RD, Bolingbrook, IL 60490
- Phone
- (630) 456-7245
- Enumerated
- Jun 20, 2012
- Record last updated
- Aug 18, 2023
- Fax
- (630) 348-3074
- Medicaid ID
- 036136590 IL
- Medicare enrollment
- Enrolled (PECOS I20150626001247); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 149 N Weber RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- James Donahue, DPTPhysical Therapist1649288267
- Sharon Drozd, PT, DPTPhysical Therapist1881166585
- Joanne Evans-Smith, OTOccupational Therapist1982950358
- Alexa Garcia, DPTPhysical Therapist1376041509
Verify Katherine Sonya Ritter 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 036136590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average family medicine physician in 2024
307 Medicare Part D claims for 252 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Cephalexin40 claims
- Albuterol Sulfate Hfa27 claims
- Methylprednisolone24 claims
- Doxycycline Hyclate18 claims
- Amoxicillin-Clavulanate Potass15 claims
- Paxlovid15 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.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationOak Brook, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Sonya Ritter among 6,215 family medicine physician records in Illinois
Katherine Sonya Ritter, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 61% of them.
- NPI issued2012 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2012 · median 2006 among the 3,714 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 family medicine physician records list a practice address in Bolingbrook
They are 25 of the 915 NPPES records with a practice address in Bolingbrook, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Bolingbrook → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Dhara Patel, MDBolingbrook, IL 604901841815610
- Varsha Sambare, M.D.Bolingbrook, IL 604901497775233
- Daniel Clark, DOLockport, IL 604911497833511
- Raymond Dipasquo, D.O.Homer Glen, IL 604911912950916
- David Dohse, D.O.Homer Glen, IL 604911679511901
- Crystal Hines-Mays, M.D.Homer Glen, IL 604911154348951
- Roseann Horan, MDHomer Glen, IL 604911821097882
- Marie Veldman, DOHomer Glen, IL 604911740280312
Common questions
What is Katherine Sonya Ritter, MD's NPI number?
Katherine Sonya Ritter, MD's National Provider Identifier (NPI) is 1255694691, issued on Jun 20, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Sonya Ritter, MD located?
The NPPES record lists a practice address at 149 N Weber RD, Bolingbrook, IL, 60490. Phone: (630) 456-7245. Providers update this record themselves, so call before visiting.
How can I verify Katherine Sonya Ritter, MD's license?
NPPES lists Illinois license number 036136590, 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 Katherine Sonya Ritter, MD prescribe under Medicare Part D?
In 2024, Katherine Sonya Ritter, MD had 307 Medicare Part D claims for 252 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.