Mark J. Schwartz, MD
Hospitalist Physician · Marshfield, WI
Mark J. Schwartz, MD is a hospitalist physician with a practice address in Marshfield, Wisconsin, and NPI 1326156654, issued on Aug 27, 2006. Check the license (Wisconsin 39152, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark J. Schwartz
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 39152 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 N Oak Ave, Marshfield, WI 54449
- Phone
- (715) 387-5537
- Enumerated
- Aug 27, 2006
- Record last updated
- Aug 28, 2025
- Medicaid ID
- 32555000 WI
- Medicare enrollment
- Enrolled (PECOS I20101013001226); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 894 in Wisconsin → Look up another NPI →
Also registered at 1000 N Oak Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Chady Abboud Leon, M.D.Hematology & Oncology Physician1770737744
- Ihab Abdalrahman, MDHospitalist Physician1497855134
- Raquel Abengozar Mingorance, MDStudent in an Organized Health Care Education/Training Program1609437755
- Aanuoluwa Abiola, M.DGeriatric Medicine (Internal Medicine) Physician1598117574
Verify Mark J. Schwartz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 39152Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average hospitalist physician in 2024
321 Medicare Part D claims for 94 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Furosemide20 claims
- Pantoprazole Sodium19 claims
- Gabapentin17 claims
- Eliquis16 claims
- Prednisone16 claims
- Amlodipine Besylate14 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): 78.9 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
- Mchs Hospitals IncMarshfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark J. Schwartz among 894 hospitalist physician records in Wisconsin
Mark J. Schwartz, MD is one of 894 hospitalist physician records with a practice address in Wisconsin. 91% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 81% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated1996 · median 2011 among the 768 with a school on file
- Record last updated2025 · 29% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 hospitalist physician records list a practice address in Marshfield
They are 42 of the 1,360 NPPES records with a practice address in Marshfield, and 894 hospitalist physician records in Wisconsin.
All 894 in Wisconsin → Every provider in Marshfield → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Ihab Abdalrahman, MDMarshfield, WI 544491497855134
- Sowjanya Bapani, MDMarshfield, WI 544491235443540
- Sudhir Duvuru, M.D.Marshfield, WI 544491073742672
- Swetha Gudibanda, M.D.,Marshfield, WI 544491437388535
- Jiangming Luo, MDMarshfield, WI 544491902914195
- Mhd. Safwan Murad, M.D.Marshfield, WI 544491467690719
- Sumedha Pathak, MDMarshfield, WI 544491548468416
- Ateeq Rehman, MDMarshfield, WI 544491265639884
Common questions
What is Mark J. Schwartz, MD's NPI number?
Mark J. Schwartz, MD's National Provider Identifier (NPI) is 1326156654, issued on Aug 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Schwartz, MD located?
The NPPES record lists a practice address at 1000 N Oak Ave, Marshfield, WI, 54449. Phone: (715) 387-5537. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Schwartz, MD's license?
NPPES lists Wisconsin license number 39152, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark J. Schwartz, MD prescribe under Medicare Part D?
In 2024, Mark J. Schwartz, MD had 321 Medicare Part D claims for 94 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Mark J. Schwartz, MD's MIPS final score?
The 2023 MIPS final score is 78.9 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.