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MICHAEL J CLEARY M.D.
NPI 1124098546
Internal Medicine - Gastroenterology in Chesterfield, MO

Active since January 26, 2006PECOS EnrolledAccepts Medicare Assignment
226 S WOODS MILL RD, SUITE 52 WEST, CHESTERFIELD, MO 63017(314) 434-2399(314) 434-5653 Get Directions Write a Review

NPPES record last updated: August 25, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Michael J Cleary M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MICHAEL J CLEARY M.D. (NPI 1124098546) is an individual gastroenterology provider in Chesterfield, Missouri, licensed in Missouri (2004023908) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1999).

NPPES Registry Identity

NPI1124098546
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameMICHAEL J CLEARYCredential: M.D.
Location Address226 S WOODS MILL RD, SUITE 52 WESTChesterfield, MO 63017-3662
Mailing Address9336 Pine AveBrentwood, MO 63144-1008
Phone(314) 434-2399
Fax(314) 434-5653
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1999
Enumeration DateJanuary 26, 2006
Last NPPES UpdateAugust 25, 2014
✔ NPI 1124098546 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in MO · 2004023908
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
226 S WOODS MILL RD, Chesterfield, MO 63017
Open in Google Maps ↗

Other Identifiers 7

OtherP01032450MO · Railroad Medicare
Medicare ID-Type Unspecified925661461MO
Other196234MO · Bc/bs Missouri
Medicaid1124098546MO
Medicare PINMA1838006MO
Medicare UPINI24301MO
Medicaid207190802MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Michael J Cleary M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID749230456
PECOS Enrollment IDI20050129000222
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Michael Cleary reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Clinic Gastroenterology, LLC
3.1 mi
Gastroenterology
621 S NEW BALLAS RD, SUITE 437-A
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 69 clinicians in this Medicare group
NPI 1528295334 (314) 251-3880
Mercy Hospitals East Communities
3.4 mi
Clinic/Center
615 S NEW BALLAS RD
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 435 clinicians in this Medicare group
NPI 1851431738 (314) 251-6382

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
78 services78 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
58 services51 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
48 services48 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
39 services39 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
34 services34 patients
Colorectal cancer screening; colonoscopy on individual at high risk G0105
Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.
23 services22 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Hospital St Louis

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis County
Emergency services Birthing friendly

Mercy Hospital South

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260077
Location10010 Kennerly RoadSaint Louis, MO 63128 · St. Louis County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MORLEY & MAXSON, MDS, PC
Obstetrics & Gynecology
226 S WOODS MILL RD, 55W
CHESTERFIELD, MO 63017
St. Louis County (314) 469-0001
DR. KATHERINE L KOMENDOWSKI MD
Pediatrics
226 S WOODS MILL RD, STE 36W
CHESTERFIELD, MO 63017
St. Louis County (314) 453-9666
JOHN C. PERLMUTTER, INC.
Ophthalmology
226 S WOODS MILL RD, SUITE 51 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 434-0202
DAVID H CORT M.D.
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 434-2399
WUCA - WOODSMILL LLC
Clinic/Center (Multi-Specialty)
226 S WOODS MILL RD, SUITE 36W
CHESTERFIELD, MO 63017
St. Louis County (314) 453-9666
DR. CAROLINE ANNE MORGAN M.D.
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 68 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 576-0930
DR. CHRISTOPHER S. CRONIN M.D.
Surgery
226 S WOODS MILL RD, SUITE 49 W
CHESTERFIELD, MO 63017
St. Louis County (314) 434-1211
DR. STEPHEN C YIM MD
Obstetrics & Gynecology (Gynecology)
226 S WOODS MILL RD, SUITE 55 WEST
CHESTERFIELD, MO 63017
St. Louis County (314) 469-4440

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael Cleary's NPI number?

The NPI number for Michael Cleary is 1124098546. It was assigned to this individual provider in the NPPES registry on January 26, 2006.

Where is Michael Cleary located?

Michael Cleary practices at 226 S Woods Mill Rd Suite 52 West, Chesterfield, MO 63017. The listed phone number is (314) 434-2399.

What is Michael Cleary's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Michael Cleary enrolled in Medicare?

Yes. Michael Cleary is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Michael Cleary's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Cleary reassigns Medicare benefits to 2 organizations: Mercy Clinic Gastroenterology, LLC (Saint Louis, MO) and Mercy Hospitals East Communities (Saint Louis, MO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael Cleary's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Cleary accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Michael Cleary as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Michael Cleary affiliated with any hospitals?

According to CMS data, Michael Cleary is affiliated with Mercy Hospital St Louis and Mercy Hospital South.

When was this NPI record last updated?

The NPPES record for Michael Cleary was last updated on August 25, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.