Margaret M. Chapman, M.D.
Internal Medicine Physician · Chicago, IL
Margaret M. Chapman, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1164748471, issued on Apr 12, 2010. Check the license (Illinois 036.135002, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Margaret M. Chapman
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036.135002 IL
MD60386184 WA
Self-reported in NPPES; status is on the state search - Practice location
- 251 E Huron St, Chicago, IL 60611
- Phone
- (206) 914-5923
- Enumerated
- Apr 12, 2010
- Record last updated
- May 6, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190109000791); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 251 E Huron St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret M. Chapman 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 036.135002Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret M. Chapman among 7,238 internal medicine physician records in Illinois
Margaret M. Chapman, 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 2010, is newer than 51% of them.
- NPI issued2010 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2010 · median 2003 among the 3,580 with a school on file
- Record last updated2014 · 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
- Kenneth Arbetter, MDChicago, IL 606111336132851
- Steven Gallo, MDChicago, IL 606111548253024
- Arnold Grauer, MDChicago, IL 606111619960184
- James Hall, MDChicago, IL 606111649263153
- Frances Langdon, MDChicago, IL 606111063405546
- Michael Lee, MDChicago, IL 606111942293451
- Hazel Manzano, MDChicago, IL 606111801889316
- Chadwick Milstead, MDChicago, IL 606111740273259
Common questions
What is Margaret M. Chapman, M.D.'s NPI number?
Margaret M. Chapman, M.D.'s National Provider Identifier (NPI) is 1164748471, issued on Apr 12, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Margaret M. Chapman, M.D. located?
The NPPES record lists a practice address at 251 E Huron St, Chicago, IL, 60611. Phone: (206) 914-5923. Providers update this record themselves, so call before visiting.
How can I verify Margaret M. Chapman, M.D.'s license?
NPPES lists Illinois license number 036.135002, 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.
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.