NPIMap

Individual provider Active NPI

Gregory Joseph Britt, M.D.

  • Hematology & Oncology Physician
  • Boulder, CO
National Provider Identifier
1982645982
Registry record updated Dec 12, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology & Oncology PhysicianTaxonomy code 207RH0003X
License
52838 Issued in CO
Practice address
4715 Arapahoe Ave
Boulder, CO 80303-1385
Phone
(303) 385-2000
Fax
(303) 267-4419
NPI assigned
Jun 9, 2006
Last updated
Dec 12, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 12, 2025

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 52838 CO Primary
Hematology & Oncology Physician 207RH0003X 229857 MA

Addresses

Primary practice location

4715 Arapahoe Ave
Boulder, CO 80303-1385

Mailing address

7951 E Maplewood Ave Ste 350
Greenwood Village, CO 80111-4758
Phone (303) 930-7803

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
I20131030001666 CO Practitioner - Hematology/Oncology 9234221359 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hematology/Oncology
Education
Georgetown University School of Medicine, 2004
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Rocky Mountain Cancer Centers LLPGroup PAC ID 7012820533, 131 clinicians

Practice addresses (Care Compare)

4715 Arapahoe Ave
Boulder, CO 80303-1385
Phone (303) 385-2000

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
52838COMDHematology & Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Intermountain Medical Group Denver, LLC Internal Medicine Current Accepting new patients
Intermountain Medical Group Denver, LLC CurrentSince Oct 31, 2017 Accepting new patients
Rocky Mountain Cancer Centers LLP Hematology & Oncology CurrentSince May 31, 2022 Accepting new patients
Rocky Mountain Cancer Centers, LLP Hematology & Oncology CurrentSince May 31, 2022 Accepting new patients
Intermountain Medical Group Denver, LLC CurrentSince Oct 31, 2017 Accepting new patients
Brockton Hospital, Inc. Past Accepting new patients
Khalid Chowdhury MD, PC PastSince Feb 12, 2013 Accepting new patients
Brockton Hospital, Inc. Past Accepting new patients

Locations

4715 Arapahoe Ave
Boulder, CO 80303
Phone (303) 385-2000

3027 N Circle Dr
Colorado Springs, CO 80909
Phone (719) 577-2555

1375 E 19th Ave
Denver, CO 80218
Phone (303) 812-2000

1601 E 19th Ave
Ste 3000
Denver, CO 80218
Phone (303) 388-4876

1800 N Williams St
Ste 200
Denver, CO 80218
Phone (303) 388-4876

1825 N Marion St
Denver, CO 80218
Phone (303) 318-3434

1960 N Ogden St
Ste 330
Denver, CO 80218
Phone (303) 318-2610

4859 Yampa St
Denver, CO 80249
Phone (303) 498-1885

7951 E Maplewood Ave
Ste 350
Greenwood Village, CO 80111

200 Exempla Cir
Lafayette, CO 80026
Phone (303) 689-4110

Interoperability endpoints

  • Direct secure messaging: gregory.britt@rmcc.ikm.direct-ci.com

Organizations & group practices 8

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

Hospital & facility affiliations 46

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

View all 46

NPI Registry JSON

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

{
    "created_epoch": "1149811200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765497600000",
    "number": "1982645982",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7951 E MAPLEWOOD AVE STE 350",
            "city": "GREENWOOD VILLAGE",
            "state": "CO",
            "postal_code": "801114758",
            "telephone_number": "303-930-7803",
            "fax_number": "303-930-5503"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4715 ARAPAHOE AVE",
            "city": "BOULDER",
            "state": "CO",
            "postal_code": "803031385",
            "telephone_number": "303-385-2000",
            "fax_number": "303-267-4419"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BRITT",
        "first_name": "GREGORY",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-09",
        "last_updated": "2025-12-12",
        "certification_date": "2025-12-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CO",
            "license": "52838",
            "primary": true
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "MA",
            "license": "229857",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boulder, CO

Sources for this page

Verify at the official NPI Registry.