Shawn Louis Marein, D.O.
Pulmonary Disease Physician · Saint Joseph, MI
Shawn Louis Marein, D.O. is a pulmonary disease physician with a practice address in Saint Joseph, Michigan, and NPI 1265964878, issued on Apr 2, 2017. Check the license (Michigan 5101027331, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Shawn Louis Marein
- Credential
- D.O.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 5101027331 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1234 Napier Ave, Saint Joseph, MI 49085
- Phone
- (269) 982-5864
- Enumerated
- Apr 2, 2017
- Record last updated
- Aug 4, 2023
- Fax
- (269) 982-5113
- Medicare enrollment
- Enrolled (PECOS I20230802003632); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 526 in Michigan → Look up another NPI →
Also registered at 1234 Napier Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erik Achramowicz, D.O.Emergency Medicine Physician1598027245
- Scott Achramowicz, PAPhysician Assistant1295244630
- Joseph Aderemi, MDPsychiatry Physician1831726546
- Kristina Aleksoniene, MDInfectious Disease Physician1659545002
- Sydney Alexander, DOFamily Medicine Physician1144952698
- Robert Allen, MDCritical Care Medicine (Internal Medicine) Physician1073540647
Verify Shawn Louis Marein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101027331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
468 Medicare Part D claims for 106 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Albuterol Sulfate Hfa73 claims
- Trelegy Ellipta71 claims
- Incruse Ellipta41 claims
- Ventolin Hfa27 claims
- Anoro Ellipta26 claims
- Spiriva Respimat25 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $10,587.93
18 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 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 2 group practices
- Lakeland Hospitals AT Niles And St Joseph IncSaint Joseph, MI
- Lakeland Medical PracticesSaint Joseph, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shawn Louis Marein among 526 pulmonary disease physician records in Michigan
Shawn Louis Marein, D.O. is one of 526 pulmonary disease physician records with a practice address in Michigan. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 85% of them.
- NPI issued2017 · 85% of these records are older, 11% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2017 · median 2004 among the 389 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Michigan
There are 526 pulmonary disease physician records in Michigan.
All 526 in Michigan → Every provider in Saint Joseph → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Michael Burton, M.D.Saint Joseph, MI 490851407160559
- Brian Dykstra, MDSaint Joseph, MI 490851346225752
- Katie Fitton, DOSaint Joseph, MI 490851982017422
- Jeffrey Grondin, M.D.Saint Joseph, MI 490851942640180
- Dawn-Alita Hernandez, M.D.Saint Joseph, MI 490851265449854
- Shishir Ojha, M.D.Saint Joseph, MI 490851225223803
- Sue Cammarata, M.D.South Haven, MI 490901558630194
- Alcides Gil-Acosta, M.D.Marshall, MI 490681487614343
Common questions
What is Shawn Louis Marein, D.O.'s NPI number?
Shawn Louis Marein, D.O.'s National Provider Identifier (NPI) is 1265964878, issued on Apr 2, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Shawn Louis Marein, D.O. located?
The NPPES record lists a practice address at 1234 Napier Ave, Saint Joseph, MI, 49085. Phone: (269) 982-5864. Providers update this record themselves, so call before visiting.
How can I verify Shawn Louis Marein, D.O.'s license?
NPPES lists Michigan license number 5101027331, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shawn Louis Marein, D.O. prescribe under Medicare Part D?
In 2024, Shawn Louis Marein, D.O. had 468 Medicare Part D claims for 106 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Shawn Louis Marein, D.O.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.