Individual provider Active NPI

Justin Komisarof, MD

  • Hematology & Oncology Physician
  • Houston, TX
National Provider Identifier
1821653502
Registry record updated Aug 25, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology & Oncology PhysicianTaxonomy code 207RH0003X
License
W5414 Issued in TX
Practice address
1515 Holcombe Blvd
Houston, TX 77030-4000
Phone
(713) 792-6161
NPI assigned
May 7, 2019
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 25, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology & Oncology Physician 207RH0003X W5414 TX Primary
Internal Medicine Physician 207R00000X W5414 TX

Addresses

Primary practice location

1515 Holcombe Blvd
Houston, TX 77030-4000

Mailing address

P O Box 4439
Houston, TX 77210-4439
Phone (713) 792-2991

Electronic endpoints 2

TypeEndpointUseAffiliation
Direct Messaging Address jkomisarof51517@direct.urmc.rochester.edu Direct
Direct Messaging Address jkomisarof51517@direct.urmc.rochester.edu Direct

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

NPI Registry JSON

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

{
    "created_epoch": "1557187200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787616000000",
    "number": "1821653502",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "P O BOX 4439",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "772104439",
            "telephone_number": "713-792-2991"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1515 HOLCOMBE BLVD",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770304000",
            "telephone_number": "713-792-6161"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOMISAROF",
        "first_name": "JUSTIN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-05-07",
        "last_updated": "2026-08-25",
        "certification_date": "2026-08-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "TX",
            "license": "W5414",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "W5414",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jkomisarof51517@direct.urmc.rochester.edu",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "OTHER",
            "address_1": "601 Elmwood Ave",
            "city": "Rochester",
            "state": "NY",
            "country_code": "US",
            "postal_code": "146420001",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jkomisarof51517@direct.urmc.rochester.edu",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "OTHER",
            "address_1": "601 Elmwood Ave",
            "city": "Rochester",
            "state": "NY",
            "country_code": "US",
            "postal_code": "146420001",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Houston, TX

Sources for this page

Verify at the official NPI Registry.