Mary S. Saunders, MD
Internal Medicine Physician · Springfield, IL
Mary S. Saunders, MD is an internal medicine physician with a practice address in Springfield, Illinois, and NPI 1255301107, issued on Jan 24, 2006. Check the license (Illinois 036071398, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mary S. Saunders
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036071398 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2603 S 6TH St, Springfield, IL 62703
- Phone
- (217) 528-0307
- Enumerated
- Jan 24, 2006
- Record last updated
- Feb 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (217) 528-0034
- Medicare enrollment
- Enrolled (PECOS I20100303000364); may accept Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 2603 S 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary S. Saunders 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 036071398Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average internal medicine physician in 2024
14,316 Medicare Part D claims for 243 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 171 claims were for opioids.
Most prescribed
- Amlodipine Besylate891 claims
- Levothyroxine Sodium831 claims
- Furosemide773 claims
- Atorvastatin Calcium694 claims
- Metoprolol Succinate423 claims
- Mirtazapine422 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): 72.1 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).
Mary S. Saunders among 7,238 internal medicine physician records in Illinois
Mary S. Saunders, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1984 · median 2003 among the 3,580 with a school on file
- Record last updated2012 · 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
196 internal medicine physician records list a practice address in Springfield
They are 196 of the 4,997 NPPES records with a practice address in Springfield, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Deborah Albright, M.D.Springfield, IL 627031639145360
- Stanley Allen, M.D.Springfield, IL 627031285631127
- Simone Borges-Young, M.D.Springfield, IL 627031871554915
- George Burns, MDSpringfield, IL 627031710957659
- Edgard Cumpa, MDSpringfield, IL 627031497743488
- George Geranios, MDSpringfield, IL 627031487607412
- Vladimir Lytchakov, MDSpringfield, IL 627031184617201
- David Pittman, M.D.Springfield, IL 627031124052030
Common questions
What is Mary S. Saunders, MD's NPI number?
Mary S. Saunders, MD's National Provider Identifier (NPI) is 1255301107, issued on Jan 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary S. Saunders, MD located?
The NPPES record lists a practice address at 2603 S 6TH St, Springfield, IL, 62703. Phone: (217) 528-0307. Providers update this record themselves, so call before visiting.
How can I verify Mary S. Saunders, MD's license?
NPPES lists Illinois license number 036071398, 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 Mary S. Saunders, MD prescribe under Medicare Part D?
In 2024, Mary S. Saunders, MD had 14,316 Medicare Part D claims for 243 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mary S. Saunders, MD's MIPS final score?
The 2023 MIPS final score is 72.1 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.