Registry data as of Aug 27, 2026

Lewis Blumenthal, MD

Obstetrics & Gynecology Physician · Chicago, IL

Lewis 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.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1750366209
Name
Lewis 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
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 55 E Washington St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Paul Ashkenaz, D.D.S.,M.S.Endodontics1427195858
  2. Carolyn Belke, MSDentist1689877342
  3. David Benditzson, M.D.Specialist1518946656
  4. Wendy Boxer, PH.D.Mental Health Counselor1902957061
  5. Paul BuenvenidaDentist1760638159
  6. Jay Callahan, PHD, LCSWClinical Social Worker1093779498

Verify Lewis Blumenthal in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036059833
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Obstetrics & Gynecology Physician providers in Illinois

There are 1,983 obstetrics & gynecology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

Other obstetrics & gynecology physician records in Illinois

  1. Anum Abbasi, MDChicago, IL1679063010
  2. Rana Abdul-Khalek, MDRoscoe, IL1275768087
  3. Idries Abdur-Rahman, M.D.Ottawa, IL1891727236
  4. Jamil Abdur-Rahman, M.D.Gurnee, IL1710914189
  5. Greta Abel, PA-CWheaton, IL1174844096
  6. Ashley Abraham, M.D.Arlington Heights, IL1457615742
  7. Iris Abrahantes Morales, MDChicago, IL1164155164
  8. Fidel Abrego, MDChicago, IL1245351824
  9. Bayan AbunarAurora, IL1972063220
  10. Sara AbuzahraChicago, IL1952105066

Common questions

What is Lewis Blumenthal, MD's NPI number?

Lewis 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 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 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.