Gregory A. Gregg, M.D.
Diagnostic Radiology Physician · Springfield, IL
Gregory A. Gregg, M.D. is a diagnostic radiology physician with a practice address in Springfield, Illinois, and NPI 1568575595, issued on Aug 16, 2006. Check the license (Illinois 036064294, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Gregg
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 036064294 IL
Self-reported in NPPES; status is on the state search - Practice location
- 800 E Carpenter St, Springfield, IL 62702
- Phone
- (217) 544-6464
- Enumerated
- Aug 16, 2006
- Record last updated
- Jan 11, 2024
- Fax
- (217) 525-5671
- Medicaid ID
- 36064294 IL
- Medicare enrollment
- Enrolled (PECOS I20050929000073); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,874 in Illinois → Look up another NPI →
Also registered at 800 E Carpenter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eric Allen, CRNACertified Registered Nurse Anesthetist1770998924
- Michael Almeida, CRNACertified Registered Nurse Anesthetist1639428949
- Autumn Altheide, CRNACertified Registered Nurse Anesthetist1265830434
- Gail Anderson, RT (R)Radiologic Technologist1992005649
- Joseph Awotwi, MDHospitalist Physician1871767251
- Joseph Basler, M.D.Diagnostic Radiology Physician1063525160
Verify Gregory A. Gregg 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 036064294Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Central Illinois Radiological Associates LtdO Fallon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory A. Gregg among 1,874 diagnostic radiology physician records in Illinois
Gregory A. Gregg, M.D. is one of 1,874 diagnostic radiology physician records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 54% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1980 · median 2004 among the 1,201 with a school on file
- Record last updated2024 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 diagnostic radiology physician records list a practice address in Springfield
They are 129 of the 4,997 NPPES records with a practice address in Springfield, and 1,874 diagnostic radiology physician records in Illinois.
All 1,874 in Illinois → Every provider in Springfield → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Jordan Barney, MDSpringfield, IL 627021174199913
- Joseph Basler, M.D.Springfield, IL 627021063525160
- Matthew Cleveland, MDSpringfield, IL 627021780243766
- Lara Dennis, M.D.Springfield, IL 627021538272547
- David Downs, D.O.Springfield, IL 627021942564869
- Theodore Gleason, M.D.Springfield, IL 627021295848216
- Bradley Kaptur, MDSpringfield, IL 627021952094351
- Timothy Mikesell, M.D.Springfield, IL 627021669811220
Common questions
What is Gregory A. Gregg, M.D.'s NPI number?
Gregory A. Gregg, M.D.'s National Provider Identifier (NPI) is 1568575595, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Gregg, M.D. located?
The NPPES record lists a practice address at 800 E Carpenter St, Springfield, IL, 62702. Phone: (217) 544-6464. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Gregg, M.D.'s license?
NPPES lists Illinois license number 036064294, 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.
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.