Warren Leonard, MD

Primary specialty

Allergy & Immunology (Internal Medicine) PhysicianTaxonomy code 207RA0201X

License

D0027344 Issued in MD

Practice address

9000 Rockville Pike RM 7B05
Bethesda, MD 20892-1674

Phone

(301) 496-0098

NPI assigned

Sep 21, 2026

Last updated

Sep 21, 2026By the provider in NPPES

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

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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

{
    "created_epoch": "1789948800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1789948800000",
    "number": "1952213498",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9020 BURDETTE RD",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208172114",
            "telephone_number": "202-897-8962"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9000 ROCKVILLE PIKE RM 7B05",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208921674",
            "telephone_number": "301-496-0098"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LEONARD",
        "first_name": "WARREN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2026-09-21",
        "last_updated": "2026-09-21",
        "certification_date": "2026-09-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RA0201X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Allergy & Immunology",
            "state": "MD",
            "license": "D0027344",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Grace M Lents, DPM
• Mark Bruce Lents, RN - STUDENT APRN
• Maria Helena Leo, NP
• Narda T Leon-Strong, CRNA
• Barton Walker Leonard, MD
• William Joseph Leonard, DDS
• Megan Leone-Perkins, PHD, MED, LMSW
• Ruby Leong, PHARMD
• Camille Isabella Leoni
• Stephanie Lerma, LGPC

• Allergy & Immunology (Internal Medicine) Physician in Bethesda, MD
• Providers in Bethesda, MD by specialty
• Allergy & Immunology (Internal Medicine) Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.