John Claude Walton, MD
Adult Medicine Physician · Chicago, IL
John Claude Walton, MD is an adult medicine physician with a practice address in Chicago, Illinois, and NPI 1245895507, issued on May 2, 2019. Check the license (Illinois 036170584, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Claude Walton
- Credential
- MD
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License numbers
- 036170584 IL
036.170584 IL
125.078956 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4822 S Cottage Grove Ave Ste 4-200, Chicago, IL 60615
- Phone
- (312) 926-3627
- Enumerated
- May 2, 2019
- Record last updated
- Aug 28, 2025
- Fax
- (312) 921-1051
- Medicare enrollment
- Enrolled (PECOS I20240819001374); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 72 in Illinois → Look up another NPI →
Also registered at 4822 S Cottage Grove Ave Ste 4-200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nathan Navarro, MDAdult Medicine Physician1508516865
Verify John Claude Walton 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 036170584Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average adult medicine physician in 2024
301 Medicare Part D claims for 49 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium36 claims
- Jardiance21 claims
- Memantine Hcl15 claims
- Levothyroxine Sodium14 claims
- Lisinopril13 claims
- Losartan Potassium12 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 FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Claude Walton among 72 adult medicine physician records in Illinois
John Claude Walton, MD is one of 72 adult medicine physician records with a practice address in Illinois. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 81% of them.
- NPI issued2019 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2021 · median 2004 among the 30 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in Illinois
There are 72 adult medicine physician records in Illinois.
All 72 in Illinois → Every provider in Chicago → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Nathan Navarro, MDChicago, IL 606151508516865
- Gary Bucher, MDChicago, IL 606141770664856
- Dorian Finder, M.D.Chicago, IL 606171801841127
- Sunali Singh, M.D.Chicago, IL 606121124077854
- Thomas Klein, MDChicago, IL 606101588776017
- Ross Slotten, MDChicago, IL 606101619089174
- Roberto Diaz, MDChicago, IL 606081255462578
- Karen Duenas Ruiz, MDChicago, IL 606221972181345
Common questions
What is John Claude Walton, MD's NPI number?
John Claude Walton, MD's National Provider Identifier (NPI) is 1245895507, issued on May 2, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Claude Walton, MD located?
The NPPES record lists a practice address at 4822 S Cottage Grove Ave Ste 4-200, Chicago, IL, 60615. Phone: (312) 926-3627. Providers update this record themselves, so call before visiting.
How can I verify John Claude Walton, MD's license?
NPPES lists Illinois license number 036170584, 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 John Claude Walton, MD prescribe under Medicare Part D?
In 2024, John Claude Walton, MD had 301 Medicare Part D claims for 49 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.