Charles D. Comfort, MD
Internal Medicine Physician · Mazon, IL
Charles D. Comfort, MD is an internal medicine physician with a practice address in Mazon, Illinois, and NPI 1861484321, issued on Aug 19, 2005. Check the license (Illinois 036067046, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Charles D. Comfort
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036067046 IL
Self-reported in NPPES; status is on the state search - Practice location
- 522 Depot St, Mazon, IL 60444
- Phone
- (815) 448-2423
- Enumerated
- Aug 19, 2005
- Record last updated
- Apr 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (815) 448-2033
- Medicaid ID
- 036067046 IL
- Medicare enrollment
- Enrolled (PECOS I20120125000361); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1974
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Charles D. Comfort 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 036067046Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% more Medicare Part D claims than the average internal medicine physician in 2024
4,758 Medicare Part D claims for 284 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 142 claims were for opioids.
Most prescribed
- Losartan Potassium217 claims
- Atorvastatin Calcium193 claims
- Levothyroxine Sodium183 claims
- Metformin Hcl Er174 claims
- Lisinopril141 claims
- Potassium Chloride138 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.
Industry payments in 2024: $113.17
6 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Morris HospitalDwight, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles D. Comfort among 7,238 internal medicine physician records in Illinois
Charles D. Comfort, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1974 · median 2003 among the 3,580 with a school on file
- Record last updated2020 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Illinois
There are 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zafar Ahmed, MDCrestwood, IL 604451700872272
- Sherriff Alli-Balogun, M.D.Matteson, IL 604431114058617
- Deborah Basile, MDCrestwood, IL 604451497741953
- Dorothy Jones, MDMatteson, IL 604431336189869
- Leonard Robinson, M.D.Matteson, IL 604431225078264
- Kelechi Emuchay, MDRomeoville, IL 604461215687504
- Doris Okafor, M.D.Romeoville, IL 604461659512945
- Claudia Vera, MDRomeoville, IL 604461811966534
Common questions
What is Charles D. Comfort, MD's NPI number?
Charles D. Comfort, MD's National Provider Identifier (NPI) is 1861484321, issued on Aug 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles D. Comfort, MD located?
The NPPES record lists a practice address at 522 Depot St, Mazon, IL, 60444. Phone: (815) 448-2423. Providers update this record themselves, so call before visiting.
How can I verify Charles D. Comfort, MD's license?
NPPES lists Illinois license number 036067046, 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 Charles D. Comfort, MD prescribe under Medicare Part D?
In 2024, Charles D. Comfort, MD had 4,758 Medicare Part D claims for 284 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.