Walter John Marbach, MD
Rheumatology Physician · Crestwood, IL
Walter John Marbach, MD is a rheumatology physician with a practice address in Crestwood, Illinois, and NPI 1891703591, issued on Aug 4, 2006. Check the license (Illinois 036-057150, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Walter John Marbach
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036-057150 IL
Self-reported in NPPES; status is on the state search - Practice location
- 13755 Cicero Ave, Crestwood, IL 60445
- Phone
- (888) 220-6432
- Enumerated
- Aug 4, 2006
- Record last updated
- May 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (708) 385-7840
- Medicaid ID
- 36057150 IL
- Medicare enrollment
- Enrolled (PECOS I20071213000260); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1977
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 13755 Cicero Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zafar Ahmed, MDInternal Medicine Physician1700872272
- Deborah Basile, MDInternal Medicine Physician1497741953
- Robert Fliegelman, DOInfectious Disease Physician1821084120
- Dorota Krezolek, M.D.Infectious Disease Physician1881728509
- Sampath Kumar, MDInfectious Disease Physician1386630622
- Joyce Rii, D.O.Infectious Disease Physician1386891679
Verify Walter John Marbach 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 036-057150Check 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 rheumatology physician in 2024
1,614 Medicare Part D claims for 122 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 214 claims were for opioids.
Most prescribed
- Methotrexate204 claims
- Hydroxychloroquine Sulfate140 claims
- Hydrocodone-Acetaminophen123 claims
- Prednisone108 claims
- Azathioprine73 claims
- Alprazolam65 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: $952.53
35 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Metro Infectious Disease Consultants LLCCrestwood, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter John Marbach among 340 rheumatology physician records in Illinois
Walter John Marbach, MD is one of 340 rheumatology physician records with a practice address in Illinois. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1977 · median 2003 among the 244 with a school on file
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
All 340 in Illinois → Every provider in Crestwood → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Hadi Hedayati, M.D.Morris, IL 604501720066111
- Deena Raval, D.OMorris, IL 604501376724773
- Maria Francis, D.O.New Lenox, IL 604511871828780
- Phyllis Bonaminio, MDOak Lawn, IL 604531841289527
- Mihaela Mihailescu, MDOak Lawn, IL 604531003943614
- Alexandra Popescu, M.D.Oak Lawn, IL 604531396720744
- Sleiman Raddawi, M.DOak Lawn, IL 604531124382825
- Mohammed Faseehuddin, DOJoliet, IL 604351336404532
Common questions
What is Walter John Marbach, MD's NPI number?
Walter John Marbach, MD's National Provider Identifier (NPI) is 1891703591, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter John Marbach, MD located?
The NPPES record lists a practice address at 13755 Cicero Ave, Crestwood, IL, 60445. Phone: (888) 220-6432. Providers update this record themselves, so call before visiting.
How can I verify Walter John Marbach, MD's license?
NPPES lists Illinois license number 036-057150, 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 Walter John Marbach, MD prescribe under Medicare Part D?
In 2024, Walter John Marbach, MD had 1,614 Medicare Part D claims for 122 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.