Mark Alan Regnier, M.D.
Pediatrics Physician · Sycamore, IL
Mark Alan Regnier, M.D. is a pediatrics physician with a practice address in Sycamore, Illinois, and NPI 1851398663, issued on Jul 7, 2005. Check the license (Illinois 036097453, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Alan Regnier
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 036097453 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1830 Mediterranean Dr, Sycamore, IL 60178
- Phone
- (815) 899-0001
- Enumerated
- Jul 7, 2005
- Record last updated
- Jul 6, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (815) 899-0002
- Medicaid ID
- 036097453 IL
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 1830 Mediterranean Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amulya Reddy, D.O.Gastroenterology Physician1295114932
Verify Mark Alan Regnier 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 036097453Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Alan Regnier among 3,176 pediatrics physician records in Illinois
Mark Alan Regnier, M.D. is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileNo · 32% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2011 · 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 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Illinois
There are 3,176 pediatrics physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,176 in Illinois → Every provider in Sycamore → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Suzanne Cook, M.D.Sycamore, IL 601781134138365
- David Phillips, M.D.Sycamore, IL 601781669484713
- Natalie Sgarlata DonnellSycamore, IL 601781134495310
- Urmi Sheth, MDSycamore, IL 601781679102867
- Kolawole Sofowora, M.D.Sycamore, IL 601781124434964
- Antonio Caceres, MDSouth Elgin, IL 601771780692525
- Jesse FreidelSouth Elgin, IL 601771457997355
- Perniya Masood, M.D.South Elgin, IL 601771013916485
Common questions
What is Mark Alan Regnier, M.D.'s NPI number?
Mark Alan Regnier, M.D.'s National Provider Identifier (NPI) is 1851398663, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Alan Regnier, M.D. located?
The NPPES record lists a practice address at 1830 Mediterranean Dr, Sycamore, IL, 60178. Phone: (815) 899-0001. Providers update this record themselves, so call before visiting.
How can I verify Mark Alan Regnier, M.D.'s license?
NPPES lists Illinois license number 036097453, 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. 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.