Mary L. Gannon, M.D.,C.A.D.C.
Addiction Medicine (Psychiatry & Neurology) Physician · Oak Brook, IL
Mary L. Gannon, M.D.,C.A.D.C. is an addiction medicine (psychiatry & neurology) physician with a practice address in Oak Brook, Illinois, and NPI 1235268541, issued on Mar 4, 2007. Check the license (Illinois 036068239, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mary L. Gannon
- Credential
- M.D.,C.A.D.C.
- Primary taxonomy
- Addiction Medicine (Psychiatry & Neurology) Physician 2084A0401X
- License number
- 036068239 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2625 Butterfield RD, Oak Brook, IL 60523
- Phone
- (630) 981-4886
- Enumerated
- Mar 4, 2007
- Record last updated
- May 17, 2011 (not updated in 15 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest addiction medicine (psychiatry & neurology) physician records → All 16 in Illinois → Look up another NPI →
Also registered at 2625 Butterfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Ackley, LCPCProfessional Counselor1609086552
- Yvonne Anderson, LCSW, CADC, MISA IIAddiction (Substance Use Disorder) Counselor1023016565
- Latasha BrownProfessional Counselor1356881296
- Michael Castellanos, LPCCounselor1841941838
- Sombat Chit-Arkhah, PTPhysical Therapist1568713139
- Anthony DenealChiropractor1457384372
Verify Mary L. Gannon 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 036068239Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $15.41
1 payment: food and beverage; the largest payer was Abbvie Inc. The 142 providers of this specialty with any payment received $4,513.66 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.
Mary L. Gannon among 16 addiction medicine (psychiatry & neurology) physician records in Illinois
Mary L. Gannon, M.D.,C.A.D.C. is one of 16 addiction medicine (psychiatry & neurology) physician records with a practice address in Illinois. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 50% of them.
- NPI issued2007 · 50% of these records are older, 25% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 44% of these records are
- Record last updated2011 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084A0401X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Addiction Medicine (Psychiatry & Neurology) Physician providers in Illinois
There are 16 addiction medicine (psychiatry & neurology) physician records in Illinois.
All 16 in Illinois → Every provider in Oak Brook → Addiction Medicine (Psychiatry & Neurology) Physician nationwide →
The 8 addiction medicine (psychiatry & neurology) physician records with the nearest ZIP codes
- Phillip Helding, D.O.Hinsdale, IL 605211043351026
- Kenneth Moore, M.D.Burr Ridge, IL 605271891899258
- Neha Datta, M.D.Orland Park, IL 604621093247405
- Charles Harris, MDNew Lenox, IL 604511508979758
- Lucy Ibrahim, MDRomeoville, IL 604461184610107
- Leonard Spishakoff, MDRomeoville, IL 604461275597098
- Carol Childers, M.D.Chicago, IL 606021700086220
- Shelley Korshak, M.D.Chicago, IL 606021750415261
Common questions
What is Mary L. Gannon, M.D.,C.A.D.C.'s NPI number?
Mary L. Gannon, M.D.,C.A.D.C.'s National Provider Identifier (NPI) is 1235268541, issued on Mar 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary L. Gannon, M.D.,C.A.D.C. located?
The NPPES record lists a practice address at 2625 Butterfield RD, Oak Brook, IL, 60523. Phone: (630) 981-4886. Providers update this record themselves, so call before visiting.
How can I verify Mary L. Gannon, M.D.,C.A.D.C.'s license?
NPPES lists Illinois license number 036068239, 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.