NPIMap

Individual provider Active NPI

Joseph E Cassara, M.D.

  • Gastroenterology Physician
  • Lafayette, CO
National Provider Identifier
1275755290
Registry record updated Mar 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
46321 Issued in CO
Practice address
1000 W South Boulder Rd
Lafayette, CO 80026-2752
Phone
(303) 604-5000
NPI assigned
May 2, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 9, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X 46321 CO Primary

Addresses

Primary practice location

1000 W South Boulder Rd
Lafayette, CO 80026-2752

Mailing address

15539 W 75TH PL
Arvada, CO 80007-7957

Other identifiers 2

IdentifierTypeStateIssuer
018852OtherCOKAISER COMMERCIAL NUMBER
40587843MedicaidCO

Electronic endpoints 1

TypeEndpointUseAffiliation
SOAP URL https://careepiceast.kp.org:14430/Interconnect-prodcom/wcf/epic.community.hie/xcpdrespondinggateways Health Information Exchange (HIE)

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20081021000774 CO Practitioner - Gastroenterology 6103891528 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
University of Vermont College of Medicine, 2001
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1000 W S Boulder Rd
Suite 200
Lafayette, CO 80026-2088
Phone (303) 604-5000

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy157
Upper gastrointestinal (GI) endoscopy for acid reflux275

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
46321COMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Boulder Valley Gastroenterology Inc. Gastroenterology CurrentSince May 9, 2022 Accepting new patients
Boulder Valley Gastroenterology Inc. Gastroenterology CurrentSince May 9, 2022 Accepting new patients
Boulder Valley Gastroenterology Inc. Gastroenterology Current Accepting new patients

Locations

1755 48th St
Ste 100
Boulder, CO 80301
Phone (720) 932-7714

1755 48th St
Boulder, CO 80301
Phone (303) 494-5263

1960 N Ogden St
Denver, CO 80218
Phone (303) 318-2500

1960 N Ogden St
Ste 210
Denver, CO 80218
Phone (303) 832-9277

1830 N Franklin St
Ste 220
Denver, CO 80218

1000 W South Boulder Rd
Ste 200
Lafayette, CO 80026
Phone (303) 604-4664

13952 Denver West Pkwy
Ste 100
Lakewood, CO 80401
Phone (303) 271-1112

13952 Denver West Pkwy
Lakewood, CO 80401
Phone (303) 271-1112

1551 Professional Ln
Longmont, CO 80501
Phone (303) 776-7582

1551 Professional Ln
Unit 290
Longmont, CO 80501

382 S Arthur Ave
Unit 100
Louisville, CO 80027

382 S Arthur Ave
Louisville, CO 80027

11900 Grant St
Northglenn, CO 80233
Phone (303) 812-5095

11900 Grant St
Ste 360
Northglenn, CO 80233
Phone (817) 306-5630

Interoperability endpoints

  • Direct secure messaging: j.cassara@gastrorockies.directbygreenway.com

Organizations & group practices 3

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 35

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

View all 35

NPI Registry JSON

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

{
    "created_epoch": "1178064000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773014400000",
    "number": "1275755290",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "15539 W 75TH PL",
            "city": "ARVADA",
            "state": "CO",
            "postal_code": "800077957"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 W SOUTH BOULDER RD",
            "city": "LAFAYETTE",
            "state": "CO",
            "postal_code": "800262752",
            "telephone_number": "303-604-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CASSARA",
        "first_name": "JOSEPH",
        "middle_name": "E",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-02",
        "last_updated": "2026-03-09",
        "certification_date": "2026-03-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CO",
            "license": "46321",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "KAISER COMMERCIAL NUMBER",
            "identifier": "018852",
            "state": "CO"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "40587843",
            "state": "CO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepiceast.kp.org:14430/Interconnect-prodcom/wcf/epic.community.hie/xcpdrespondinggateways",
            "affiliation": "N",
            "endpointDescription": "CAREQUALITY",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "280 Exempla Cir",
            "city": "Lafayette",
            "state": "CO",
            "country_code": "US",
            "postal_code": "800263370",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Lafayette, CO

Sources for this page

Verify at the official NPI Registry.