Lewis S. Blumenthal, MD
Obstetrics & Gynecology Physician · Chicago, IL
Lewis S. Blumenthal, MD is an obstetrics & gynecology physician with a practice address in Chicago, Illinois, and NPI 1750366209, issued on Dec 7, 2005. Check the license (Illinois 036059833, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Lewis S. Blumenthal
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036059833 IL
Self-reported in NPPES; status is on the state search - Practice location
- 55 E Washington St, Chicago, IL 60602
- Phone
- (312) 263-5517
- Enumerated
- Dec 7, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (312) 263-5565
- Medicaid ID
- 036059833 IL
- Entity
- Type 1 · individual
Also registered at 55 E Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Lewis S. Blumenthal 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 036059833Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
700 obstetrics & gynecology physician records list a practice address in Chicago
They are 700 of the 63,379 NPPES records with a practice address in Chicago, and 2,062 obstetrics & gynecology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 700 in Chicago → All 2,062 in Illinois → Every provider in Chicago →
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- Jamil Abdur-Rahman, M.D.Gurnee, IL1710914189
- Bassel Abouzeid, MDPeoria, IL1376160846
- Ashley Abraham, M.D.Arlington Heights, IL1457615742
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- Fidel Abrego, MDChicago, IL1245351824
- Bayan AbunarAurora, IL1972063220
Common questions
What is Lewis S. Blumenthal, MD's NPI number?
Lewis S. Blumenthal, MD's National Provider Identifier (NPI) is 1750366209, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Lewis S. Blumenthal, MD located?
The NPPES record lists a practice address at 55 E Washington St, Chicago, IL, 60602. Phone: (312) 263-5517. Providers update this record themselves, so call before visiting.
How can I verify Lewis S. Blumenthal, MD's license?
NPPES lists Illinois license number 036059833, 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. 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.