Steven J. Mash, M.D.
Orthopaedic Surgery Physician · Downers Grove, IL
Steven J. Mash, M.D. is an orthopaedic surgery physician with a practice address in Downers Grove, Illinois, and NPI 1629064449, issued on Sep 27, 2005. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Steven J. Mash
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- Practice location
- 4115 Fairview Ave, Downers Grove, IL 60515
- Phone
- (630) 968-1881
- Enumerated
- Sep 27, 2005
- Record last updated
- Mar 4, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (630) 968-3762
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 995 in Illinois → Look up another NPI →
Also registered at 4115 Fairview Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shobita Chander, PA-CPhysician Assistant1720485238
- Alexandria CismesiaOccupational Therapist1578910899
- Lauren GillespiePhysical Therapy Assistant1871628867
- Lawrence Lieber, M.D.Orthopaedic Surgery Physician1316933120
- Deborah Mahalski, BSPhysical Therapist1427191022
- Steven Mather, M.D.Orthopaedic Surgery Physician1346236163
Verify Steven J. Mash 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
96% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
14 Medicare Part D claims, against an average of 346 among the 16,516 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.
Steven J. Mash among 995 orthopaedic surgery physician records in Illinois
Steven J. Mash, M.D. is one of 995 orthopaedic surgery physician records with a practice address in Illinois. 77% 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, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 56% of these records are
- Record last updated2008 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Illinois
There are 995 orthopaedic surgery physician records in Illinois.
All 995 in Illinois → Every provider in Downers Grove → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Lawrence Lieber, M.D.Downers Grove, IL 605151316933120
- Steven Mather, M.D.Downers Grove, IL 605151346236163
- Dilio Menacho, MDDowners Grove, IL 605151174516512
- Akhil Reddy, MDDowners Grove, IL 605151679076475
- Vikram Gandhi, MDWoodridge, IL 605171265419097
- Melissa Capo-Murray, RSTHinsdale, IL 605211447551940
- Michael Collins, M.D.Hinsdale, IL 605211194817817
- Michael Durkin, M.D.Hinsdale, IL 605211962594606
Common questions
What is Steven J. Mash, M.D.'s NPI number?
Steven J. Mash, M.D.'s National Provider Identifier (NPI) is 1629064449, issued on Sep 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven J. Mash, M.D. located?
The NPPES record lists a practice address at 4115 Fairview Ave, Downers Grove, IL, 60515. Phone: (630) 968-1881. Providers update this record themselves, so call before visiting.
How can I verify Steven J. Mash, M.D.'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 Steven J. Mash, M.D. prescribe under Medicare Part D?
In 2024, Steven J. Mash, M.D. had 14 Medicare Part D claims; the average among orthopaedic surgery physician prescribers was 346. 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.