Michael J. Walter, MD
Critical Care Medicine (Internal Medicine) Physician · Maryville, IL
Michael J. Walter, MD is a critical care medicine (internal medicine) physician with a practice address in Maryville, Illinois, and NPI 1629096359, issued on Jul 18, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Michael J. Walter
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 103849 MO
Self-reported in NPPES; status is on the state search - Practice location
- 6812 State Route 162 Ste 202, Maryville, IL 62062
- Phone
- (618) 288-6844
- Enumerated
- Jul 18, 2006
- Record last updated
- Aug 28, 2024
- Fax
- (618) 288-6852
- Medicaid ID
- 208882001 MO
- Medicare enrollment
- Enrolled (PECOS I20170824000003); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 281 in Illinois → Look up another NPI →
Also registered at 6812 State Route 162 Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ryan Parker, NP-CNurse Practitioner1912478231
- Natalie Ritzheimer, PAPhysician Assistant1356821383
Verify Michael J. Walter 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
3% more Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
714 Medicare Part D claims for 109 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Albuterol Sulfate Hfa76 claims
- Trelegy Ellipta65 claims
- Anoro Ellipta60 claims
- Stiolto Respimat52 claims
- Breztri Aerosphere50 claims
- Prednisone38 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 74.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Anderson Medical Group LLCMaryville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. Walter among 281 critical care medicine (internal medicine) physician records in Illinois
Michael J. Walter, MD is one of 281 critical care medicine (internal medicine) physician records with a practice address in Illinois. 92% 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, 71% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated1990 · median 2008 among the 226 with a school on file
- Record last updated2024 · 22% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Illinois
There are 281 critical care medicine (internal medicine) physician records in Illinois.
All 281 in Illinois → Every provider in Maryville → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Barbara Foner, MD MPH FCCP ABSMMaryville, IL 620621437141090
- Adarsh Sahni, MDMaryville, IL 620621740225226
- Preeti Patel, MDMattoon, IL 619381336580273
- Ashley Rodriguez, MDMattoon, IL 619381083107122
- Maamoun Zane, M.D.Mattoon, IL 619381669831509
- Yashaswi Belvadi, MDBelleville, IL 622201104075035
- Martin Musumbi, M.D.Belleville, IL 622201215185699
- Brian Reichardt, M.D.O Fallon, IL 622691689802001
Common questions
What is Michael J. Walter, MD's NPI number?
Michael J. Walter, MD's National Provider Identifier (NPI) is 1629096359, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Walter, MD located?
The NPPES record lists a practice address at 6812 State Route 162 Ste 202, Maryville, IL, 62062. Phone: (618) 288-6844. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Walter, 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 Michael J. Walter, MD prescribe under Medicare Part D?
In 2024, Michael J. Walter, MD had 714 Medicare Part D claims for 109 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
What is Michael J. Walter, MD's MIPS final score?
The 2023 MIPS final score is 74.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.