Mary McDermott, M.D.
Internal Medicine Physician · Chicago, IL
Mary McDermott, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1992911028, issued on May 15, 2007. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mary McDermott
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 675 N Saint Clair St, Chicago, IL 60611
- Phone
- (312) 695-8630
- Enumerated
- May 15, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100505000679); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 1989
- Entity
- Type 1 · individual
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Also registered at 675 N Saint Clair St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary McDermott in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,281 Medicare Part D claims for 90 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium137 claims
- Losartan Potassium77 claims
- Amlodipine Besylate65 claims
- Levothyroxine Sodium60 claims
- Omeprazole57 claims
- Rosuvastatin Calcium57 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): 94.1 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).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationBloomingdale, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary McDermott among 7,238 internal medicine physician records in Illinois
Mary McDermott, M.D. 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 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 55% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1989 · median 2003 among the 3,580 with a school on file
- Record last updated2007 · 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).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Frances Langdon, MDChicago, IL 606111063405546
- Michael Lee, MDChicago, IL 606111942293451
- Hazel Manzano, MDChicago, IL 606111801889316
- Chadwick Milstead, MDChicago, IL 606111740273259
Common questions
What is Mary McDermott, M.D.'s NPI number?
Mary McDermott, M.D.'s National Provider Identifier (NPI) is 1992911028, issued on May 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary McDermott, M.D. located?
The NPPES record lists a practice address at 675 N Saint Clair St, Chicago, IL, 60611. Phone: (312) 695-8630. Providers update this record themselves, so call before visiting.
How can I verify Mary McDermott, M.D.'s license?
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 McDermott, M.D. prescribe under Medicare Part D?
In 2024, Mary McDermott, M.D. had 1,281 Medicare Part D claims for 90 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mary McDermott, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 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.