Marit Susan Tweet, M.D.
Emergency Medicine Physician · Springfield, IL
Marit Susan Tweet, M.D. is an emergency medicine physician with a practice address in Springfield, Illinois, and NPI 1942651781, issued on Jun 22, 2016. Check the license (Illinois 036.148594, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Marit Susan Tweet
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 036.148594 IL
125.069110 IL
Self-reported in NPPES; status is on the state search - Practice location
- 701 N 1St St, Springfield, IL 62702
- Phone
- (217) 545-3518
- Enumerated
- Jun 22, 2016
- Record last updated
- Apr 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (217) 545-2711
- Medicare enrollment
- Enrolled (PECOS I20190826002251); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2016
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 701 N 1St St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hanni AbdinCritical Care Medicine (Internal Medicine) Physician1619264504
- Shefta Akhunji, M.DHospitalist Physician1477937811
- Matthew Albrecht, M.D.Emergency Medicine Physician1174887384
- Kaci Alexander, D.O.Internal Medicine Physician1427439363
- Yasmina Arroyo, M.D.Internal Medicine Physician1922459544
- Jeffrey Austen, M.D.Emergency Medicine Physician1336588417
Verify Marit Susan Tweet in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036.148594Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average emergency medicine physician in 2024
71 Medicare Part D claims for 54 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen17 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.
Bills Medicare through one group practice
- Midwest Emergency Department Specialists LtdSpringfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marit Susan Tweet among 3,291 emergency medicine physician records in Illinois
Marit Susan Tweet, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 65% of them.
- NPI issued2016 · 65% of these records are older, 32% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2016 · median 2012 among the 1,867 with a school on file
- Record last updated2021 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
126 emergency medicine physician records list a practice address in Springfield
They are 126 of the 4,997 NPPES records with a practice address in Springfield, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Springfield → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Dennis Adams, M.D.Springfield, IL 627021780739870
- Jonathan Dela Cruz, M.D.Springfield, IL 627021639335912
- Konstantin Denev, M.D.Springfield, IL 627021437131299
- Kristen Ferguson, M.D.Springfield, IL 627021750308227
- Dennis Goldberg, M.D.Springfield, IL 627021649499237
- David Griffen, M.D., PH.D.Springfield, IL 627021992749899
- Richard Jeisy, M.D.Springfield, IL 627021912218892
- Jason Kegg, M.D.Springfield, IL 627021083811764
Common questions
What is Marit Susan Tweet, M.D.'s NPI number?
Marit Susan Tweet, M.D.'s National Provider Identifier (NPI) is 1942651781, issued on Jun 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Marit Susan Tweet, M.D. located?
The NPPES record lists a practice address at 701 N 1St St, Springfield, IL, 62702. Phone: (217) 545-3518. Providers update this record themselves, so call before visiting.
How can I verify Marit Susan Tweet, M.D.'s license?
NPPES lists Illinois license number 036.148594, as entered by the provider. 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 Marit Susan Tweet, M.D. prescribe under Medicare Part D?
In 2024, Marit Susan Tweet, M.D. had 71 Medicare Part D claims for 54 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.