Timothy Riddell, PA-C
Physician Assistant · Chicago, IL
Timothy Riddell, PA-C is a physician assistant with a practice address in Chicago, Illinois, and NPI 1336503580, issued on Apr 13, 2016. Check the license (Illinois 085005782, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Timothy Riddell
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 085005782 IL
Self-reported in NPPES; status is on the state search - Practice location
- 251 E Huron St, Chicago, IL 60611
- Phone
- (312) 926-6895
- Enumerated
- Apr 13, 2016
- Record last updated
- Jul 23, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160628001214); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 251 E Huron St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy Riddell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085005782Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationLake Forest, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Riddell among 4,926 physician assistant records in Illinois
Timothy Riddell, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 40% of them.
- NPI issued2016 · 40% of these records are older, 57% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2015 · median 2019 among the 3,407 with a school on file
- Record last updated2016 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,445 physician assistant records list a practice address in Chicago
They are 1,445 of the 63,379 NPPES records with a practice address in Chicago, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Chicago → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Regina Bart, PAChicago, IL 606111083656284
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- Karen Ferkau, P.A.Chicago, IL 606111013082809
- Jung Lee, PAChicago, IL 606111588698476
- Michael Maclean, PA-CChicago, IL 606111033139399
- Vera Nisavic, P.A.Chicago, IL 606111174696207
- Laura Nishi, PAChicago, IL 606111821040049
Common questions
What is Timothy Riddell, PA-C's NPI number?
Timothy Riddell, PA-C's National Provider Identifier (NPI) is 1336503580, issued on Apr 13, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Riddell, PA-C located?
The NPPES record lists a practice address at 251 E Huron St, Chicago, IL, 60611. Phone: (312) 926-6895. Providers update this record themselves, so call before visiting.
How can I verify Timothy Riddell, PA-C's license?
NPPES lists Illinois license number 085005782, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
What is Timothy Riddell, PA-C'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.