Charles A. Mason, M.D.
Anesthesiology Physician · Oak Lawn, IL
Charles A. Mason, M.D. is an anesthesiology physician with a practice address in Oak Lawn, Illinois, and NPI 1447245048, issued on Sep 20, 2005. Check the license (Illinois 036-171983, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Charles A. Mason
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License numbers
- 036-171983 IL
L2448 TX
4032 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4440 W 95TH St, Oak Lawn, IL 60453
- Phone
- (708) 684-5745
- Enumerated
- Sep 20, 2005
- Record last updated
- Oct 9, 2024
- Medicaid ID
- 100269640 WI
- Medicare enrollment
- Enrolled (PECOS I20100619000159); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 2,575 in Illinois → Look up another NPI →
Also registered at 4440 W 95TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nadia Abdessalam, FNP-BCFamily Nurse Practitioner1356888283
- Akram Abdoue, M.D.Anesthesiology Physician1992752489
- Ahmad Abdulla, MDEmergency Medicine Physician1467202556
- Joseph Abraham, CRNACertified Registered Nurse Anesthetist1831653401
- Katherine Absalon, MOT, OTR/LOccupational Therapist1457753436
- Tassneem Abu-Rezeq, DNP, APRN, CPNP-ACPediatric Nurse Practitioner1831904663
Verify Charles A. Mason 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 036-171983Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average anesthesiology physician in 2024
148 Medicare Part D claims for 30 beneficiaries, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Np Thyroid18 claims
- Meloxicam17 claims
- Mounjaro14 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.
Bills Medicare through one group practice
- Emergenchealth PLLCBeaumont, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles A. Mason among 2,575 anesthesiology physician records in Illinois
Charles A. Mason, M.D. is one of 2,575 anesthesiology physician records with a practice address in Illinois. 71% 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, 94% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1997 · median 2006 among the 1,608 with a school on file
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 anesthesiology physician records list a practice address in Oak Lawn
They are 39 of the 2,993 NPPES records with a practice address in Oak Lawn, and 2,575 anesthesiology physician records in Illinois.
All 2,575 in Illinois → Every provider in Oak Lawn → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Akram Abdoue, M.D.Oak Lawn, IL 604531992752489
- Adam Block, D.O.Oak Lawn, IL 604531437106630
- Wilfred Boarden, M.D.Oak Lawn, IL 604531497792014
- Ajay Donthamsetti, MDOak Lawn, IL 604531295773661
- Safwat Eskandar, MDOak Lawn, IL 604531265494116
- John Ippolito, MDOak Lawn, IL 604531073565545
- Maria Kimovec, M.D.Oak Lawn, IL 604531790732279
- Meena Kudalkar, MDOak Lawn, IL 604531508837956
Common questions
What is Charles A. Mason, M.D.'s NPI number?
Charles A. Mason, M.D.'s National Provider Identifier (NPI) is 1447245048, issued on Sep 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles A. Mason, M.D. located?
The NPPES record lists a practice address at 4440 W 95TH St, Oak Lawn, IL, 60453. Phone: (708) 684-5745. Providers update this record themselves, so call before visiting.
How can I verify Charles A. Mason, M.D.'s license?
NPPES lists Illinois license number 036-171983, 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 A. Mason, M.D. prescribe under Medicare Part D?
In 2024, Charles A. Mason, M.D. had 148 Medicare Part D claims for 30 beneficiaries; the average among anesthesiology physician prescribers was 402. 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.