John S. Smiarowski, M.D.
Gastroenterology Physician · Monroe, LA
John S. Smiarowski, M.D. is a gastroenterology physician with a practice address in Monroe, Louisiana, and NPI 1568462851, issued on Jul 28, 2005. Check the license (Louisiana 05444R, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John S. Smiarowski
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 05444R LA
Self-reported in NPPES; status is on the state search - Practice location
- 611 Grammont St, Monroe, LA 71201
- Phone
- (318) 325-2634
- Enumerated
- Jul 28, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (318) 812-1205
- Medicaid ID
- 1322890 LA
- Medicare enrollment
- Enrolled (PECOS I20110118000547); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1971
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 263 in Louisiana → Look up another NPI →
Also registered at 611 Grammont St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Boyce, M.D.Gastroenterology Physician1760482087
- William Coleman, FNP-CFamily Nurse Practitioner1104774025
- Hunter HallGastroenterology Physician1104388982
- Henry Hinkle, M.D.Gastroenterology Physician1730147786
- Alisha Lee, PAPhysician Assistant1902184930
- Brian Levatino, M.D.Gastroenterology Physician1740473925
Verify John S. Smiarowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 05444RCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average gastroenterology physician in 2024
616 Medicare Part D claims for 146 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Omeprazole118 claims
- Pantoprazole Sodium98 claims
- Linzess78 claims
- Famotidine59 claims
- Colestipol Hcl45 claims
- Colesevelam Hcl44 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): 93.2 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).
Industry payments in 2024: $949.30
39 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Gastroenterology Clinic, A Professional Medical CorporationMonroe, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John S. Smiarowski among 263 gastroenterology physician records in Louisiana
John S. Smiarowski, M.D. is one of 263 gastroenterology physician records with a practice address in Louisiana. 88% 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, 83% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1971 · median 2004 among the 207 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Louisiana
There are 263 gastroenterology physician records in Louisiana.
All 263 in Louisiana → Every provider in Monroe → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Gregory Boyce, M.D.Monroe, LA 712011760482087
- Hunter HallMonroe, LA 712011104388982
- Vincent Herlevic, M.D.Monroe, LA 712011194111518
- Henry Hinkle, M.D.Monroe, LA 712011730147786
- Brian Levatino, M.D.Monroe, LA 712011740473925
- Christopher Oglesby, D.O.Monroe, LA 712011184155129
- Arthur Richert, M.D.Monroe, LA 712011013127935
- Robert Seegers, M.D.Monroe, LA 712011124028444
Common questions
What is John S. Smiarowski, M.D.'s NPI number?
John S. Smiarowski, M.D.'s National Provider Identifier (NPI) is 1568462851, issued on Jul 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John S. Smiarowski, M.D. located?
The NPPES record lists a practice address at 611 Grammont St, Monroe, LA, 71201. Phone: (318) 325-2634. Providers update this record themselves, so call before visiting.
How can I verify John S. Smiarowski, M.D.'s license?
NPPES lists Louisiana license number 05444R, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John S. Smiarowski, M.D. prescribe under Medicare Part D?
In 2024, John S. Smiarowski, M.D. had 616 Medicare Part D claims for 146 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is John S. Smiarowski, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.2 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.