Kathleen A. Mahan, MD
Family Medicine Physician · Lombard, IL
Kathleen A. Mahan, MD is a family medicine physician with a practice address in Lombard, Illinois, and NPI 1639100464, issued on Jul 6, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Kathleen A. Mahan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301093916 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1801 S Highland Ave Ste 130, Lombard, IL 60148
- Phone
- (630) 627-4722
- Enumerated
- Jul 6, 2006
- Record last updated
- Dec 6, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (630) 627-9134
- Medicare enrollment
- Enrolled (PECOS I20061117000355); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 1801 S Highland Ave Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kathleen A. Mahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average family medicine physician in 2024
2,897 Medicare Part D claims for 286 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 73 claims were for opioids.
Most prescribed
- Atorvastatin Calcium174 claims
- Levothyroxine Sodium163 claims
- Amlodipine Besylate113 claims
- Rosuvastatin Calcium87 claims
- Lisinopril82 claims
- Metformin Hcl78 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: $32.96
1 payment: food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Dupage Medical Group LtdLombard, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathleen A. Mahan among 6,215 family medicine physician records in Illinois
Kathleen A. Mahan, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2002 · median 2006 among the 3,714 with a school on file
- Record last updated2016 · 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 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family medicine physician records list a practice address in Lombard
They are 21 of the 1,347 NPPES records with a practice address in Lombard, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Lombard → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kaniz Bhuiyan, M.DLombard, IL 601481427276880
- Gregory Castello, D.O.Lombard, IL 601481417939323
- David Cespedes, DOLombard, IL 601481699775650
- Sheri Evans, DOLombard, IL 601481831140789
- Charles Friedl, D.O.Lombard, IL 601481003945320
- J Graziano, M.D.Lombard, IL 601481730373747
- Gartrell King, M.D.Lombard, IL 601481962449140
- Jesse Kulig, DOLombard, IL 601481891902151
Common questions
What is Kathleen A. Mahan, MD's NPI number?
Kathleen A. Mahan, MD's National Provider Identifier (NPI) is 1639100464, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen A. Mahan, MD located?
The NPPES record lists a practice address at 1801 S Highland Ave Ste 130, Lombard, IL, 60148. Phone: (630) 627-4722. Providers update this record themselves, so call before visiting.
How can I verify Kathleen A. Mahan, MD's license?
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 Kathleen A. Mahan, MD prescribe under Medicare Part D?
In 2024, Kathleen A. Mahan, MD had 2,897 Medicare Part D claims for 286 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.