Lewis S Blumenthal, MD

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

036059833 Issued in IL

Practice address

55 E Washington St
Suite 3700
Chicago, IL 60602-2103

Phone

(312) 263-5517

Fax

(312) 263-5565

NPI assigned

Dec 7, 2005

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1133913600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1750366209",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 E WASHINGTON ST",
            "address_2": "SUITE 3700",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606022103",
            "telephone_number": "312-263-5517",
            "fax_number": "312-263-5565"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 E WASHINGTON ST",
            "address_2": "SUITE 3700",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606022103",
            "telephone_number": "312-263-5517",
            "fax_number": "312-263-5565"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BLUMENTHAL",
        "first_name": "LEWIS",
        "middle_name": "S",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-07",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "IL",
            "license": "036059833",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "036059833",
            "state": "IL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Ira Blumen
• Philip Blumenfeld, M.D.
• Alivia Blumenstein, MD
• Nicole Rose Blumenstein, MD
• Jane E. Blumenthal, M.D.
• Rachel Scarlett Blumenthal, DNP
• Jennifer Blumetti, MD
• Madalin Blumhoff
• Stefanie L Blummer
• Alyssa Blumstein, PA-C

• Obstetrics & Gynecology Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Obstetrics & Gynecology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.