NPIMap

Individual provider Active NPI

Alexander Donald Leung, M.D.

  • Vascular Surgery Physician
  • Denver, CO
National Provider Identifier
1861855017
Registry record updated Sep 22, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Vascular Surgery PhysicianTaxonomy code 2086S0129X
License
DR.0066047 Issued in CO
Practice address
4105 E Florida Ave Ste 200
Denver, CO 80222-3641
Phone
(303) 539-0736
NPI assigned
Apr 4, 2016
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 22, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Vascular Surgery Physician 2086S0129X DR.0066047 CO Primary
Vascular Surgery Physician 2086S0129X 68790 WI

Addresses

Primary practice location

4105 E Florida Ave Ste 200
Denver, CO 80222-3641

Mailing address

4105 E Florida Ave Ste 200
Denver, CO 80222-3641
Phone (303) 539-0736

Other practice location 1

4110 Briargate Pkwy Ste 460
Colorado Springs, CO 80920-7839
Phone (719) 364-3648

Other practice location 2

Uw Hospitals and Clinics
600 Highland Ave
Madison, WI 53792-0001
Phone (608) 263-6400

Other identifiers 1

IdentifierTypeStateIssuer
9000195258MedicaidCO

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address leung@vascularinstitute.com Direct

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO, KS2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20210707001749 CO Practitioner - Vascular Surgery 6305138322 Reassigns benefits to 4 organizations
I20220817000944 KS Practitioner - Vascular Surgery 6305138322 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Vascular Surgery
Education
Other, 2011
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Annest Synn Nowak and Mubarak Professional LLCGroup PAC ID 8921909755, 11 clinicians
Vascular Labs of the Rockies PLLCGroup PAC ID 0244654473, 5 clinicians

Practice addresses (Care Compare)

100 E College Dr
Vascular Institute of the Rockies
Colby, KS 67701-3702
Phone 3035390736839

1960 N Ogden St
Denver, CO 80218-3667

4105 E Florida Ave
200 Vascular Institute of the Rockies
Denver, CO 80222-3641
Phone (303) 539-0736

4105 E Florida Ave
Suite 100
Denver, CO 80222-3636
Phone (303) 539-0736

8350 Colorado Blvd
Unit 160
Firestone, CO 80504-6803
Phone (303) 673-1370

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
87.76 of 100Reported as group
Quality
75.46
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
90.15 of 100Reported as group
Quality
92.76
Improvement activities
40
Cost
69.94

Procedures performed for Medicare patients

ProcedureNumber of procedures
Spinal fusion27
Varicose vein removal26
Leg revascularization (restoring blood flow)30
Removal of tissue36

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
DR.0066047COMDVascular Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Montrose Memorial Hospital, Inc CurrentSince Sep 10, 2024 Accepting new patients
Intermountain Medical Group Denver, LLC CurrentSince Jan 1, 2025 Accepting new patients
Vascular Labs of the Rockies PLLC CurrentSince Jul 1, 2021 Accepting new patients
Montrose Memorial Hospital, Inc Current Accepting new patients
Intermountain Medical Group Denver, LLC CurrentSince Jan 1, 2025 Accepting new patients
Intermountain Medical Group Denver, LLC Current Accepting new patients
Annest Synn Nowak & Mubarak Professional LLC CurrentSince Jun 1, 2021 Accepting new patients

Locations

310 County Road 14
Del Norte, CO 81132
Phone (719) 657-2510

1601 E 19th Ave
Ste 3950
Denver, CO 80218
Phone (303) 539-0736

4105 E Florida Ave
Denver, CO 80222
Phone (303) 539-0736

4105 E Florida Ave
Ste 100
Denver, CO 80222
Phone (303) 539-0736

4105 E Florida Ave
Ste 200
Denver, CO 80222
Phone (303) 364-1057

1830 N Franklin St
Ste 340
Denver, CO 80218
Phone (303) 318-3330

360 W Park Dr
Ste 101B
Grand Junction, CO 81505
Phone (970) 852-4847

360 W Park Dr
Grand Junction, CO 81505
Phone (970) 244-2482

340 Exempla Cir
Ste 300
Lafayette, CO 80026
Phone (303) 673-1390

800 S 3rd St
Montrose, CO 81401
Phone (970) 240-2211

3970 Youngfield St
Wheat Ridge, CO 80033
Phone (303) 539-0736

100 E College Dr
Colby, KS 67701
Phone (785) 462-7511

Organizations & group practices 7

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 11

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

NPI Registry JSON

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

{
    "created_epoch": "1459728000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790035200000",
    "number": "1861855017",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4105 E FLORIDA AVE STE 200",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802223641",
            "telephone_number": "303-539-0736"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4105 E FLORIDA AVE STE 200",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802223641",
            "telephone_number": "303-539-0736"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4110 Briargate Pkwy Ste 460",
            "address_purpose": "LOCATION",
            "city": "Colorado Springs",
            "state": "CO",
            "postal_code": "809207839",
            "country_code": "US",
            "telephone_number": "719-364-3648",
            "fax_number": "719-364-6488",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "Uw Hospitals and Clinics",
            "address_2": "600 Highland Ave",
            "address_purpose": "LOCATION",
            "city": "Madison",
            "state": "WI",
            "postal_code": "537920001",
            "country_code": "US",
            "telephone_number": "608-263-6400",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LEUNG",
        "first_name": "ALEXANDER",
        "middle_name": "DONALD",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-04-04",
        "last_updated": "2026-09-22",
        "certification_date": "2026-09-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086S0129X",
            "taxonomy_group": "",
            "desc": "Surgery, Vascular Surgery",
            "state": "CO",
            "license": "DR.0066047",
            "primary": true
        },
        {
            "code": "2086S0129X",
            "taxonomy_group": "",
            "desc": "Surgery, Vascular Surgery",
            "state": "WI",
            "license": "68790",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "9000195258",
            "state": "CO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "leung@vascularinstitute.com",
            "affiliation": "N",
            "endpointDescription": "work email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "4105 E Florida Ave Ste 200",
            "city": "Denver",
            "state": "CO",
            "country_code": "US",
            "postal_code": "802223641",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Denver, CO

Sources for this page

Verify at the official NPI Registry.