Chester J. Mellies, MD
Allergy & Immunology Physician · Rockford, IL
Chester J. Mellies, MD is an allergy & immunology physician with a practice address in Rockford, Illinois, and NPI 1770563660, issued on Jan 18, 2006. Check the license (Illinois 036045491, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Chester J. Mellies
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 036045491 IL
Self-reported in NPPES; status is on the state search - Practice location
- 698 Featherstone RD, Rockford, IL 61107
- Phone
- (815) 398-3277
- Enumerated
- Jan 18, 2006
- Record last updated
- Sep 21, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (815) 484-7001
- Medicaid ID
- 036045491 IL
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 162 in Illinois → Look up another NPI →
Also registered at 698 Featherstone RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Leesa Gillooley, PA-CPhysician Assistant1154567964
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Verify Chester J. Mellies 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 036045491Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
35 Medicare Part D claims, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Chester J. Mellies among 162 allergy & immunology physician records in Illinois
Chester J. Mellies, MD is one of 162 allergy & immunology physician records with a practice address in Illinois. 86% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 48% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2011 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Illinois
There are 162 allergy & immunology physician records in Illinois.
All 162 in Illinois → Every provider in Rockford → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Charles Frey, DORockford, IL 611071356321244
- Fatima Mohiuddin, MDRockford, IL 611071578674834
- Ahmad Mourad, M.DRockford, IL 611071861425720
- Timothy Jessen, MDFreeport, IL 610321831165034
- Mark Blaser, MDMoline, IL 612651982683264
- David Chudwin, M.D.Bourbonnais, IL 609141669472262
- Kyung Kim, M.D.Niles, IL 607141104932136
- Kirk Shepard, MD, MSChicago, IL 606571982022810
Common questions
What is Chester J. Mellies, MD's NPI number?
Chester J. Mellies, MD's National Provider Identifier (NPI) is 1770563660, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chester J. Mellies, MD located?
The NPPES record lists a practice address at 698 Featherstone RD, Rockford, IL, 61107. Phone: (815) 398-3277. Providers update this record themselves, so call before visiting.
How can I verify Chester J. Mellies, MD's license?
NPPES lists Illinois license number 036045491, 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 Chester J. Mellies, MD prescribe under Medicare Part D?
In 2024, Chester J. Mellies, MD had 35 Medicare Part D claims; the average among allergy & immunology physician prescribers was 741. 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.