Active NPI
Zachary A. Lambertsen, M.D.
- Diagnostic Radiology Physician
- Little Rock, AR
National Provider Identifier
1770922882
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Diagnostic Radiology Physician
- License
- E-12117
- Practice address
- 500 S University Ave Ste 101
Little Rock, AR 72205-5314 - Phone
- (501) 664-3914
- Fax
- (501) 664-5246
- NPI assigned
- Jun 21, 2013
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Diagnostic Radiology Physician | 2085R0202X | DR.0070667 | CO | |
| Vascular & Interventional Radiology Physician | 2085R0204X | DR.0070667 | CO | |
| Diagnostic Radiology Physician | 2085R0202X | E-12117 | AR | Primary |
Addresses
Primary practice location
500 S University Ave Ste 101
Little Rock, AR 72205-5314
Mailing address
500 S University Ave Ste 101
Little Rock, AR 72205-5314
Phone (501) 664-3914
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in AR, CO
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Diagnostic Radiology
- Education
- University of Arkansas College of Medicine, 2013
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
4747 Arapahoe Ave
Boulder, CO 80303-1131
Phone (303) 465-0401
Hospital & facility affiliations
- Boulder Community Health
- University of Colorado Hospital Authority
- Centura Health-St Anthony North Health Campus
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| DR.0070667 | CO | MD | Vascular & Interventional Radiology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Boulder Radiologists Inc P C | Diagnostic Radiology | Current | Accepting new patients |
| Radiology Associates PA | Diagnostic Radiology | Current | Accepting new patients |
| Bouldercentre for Orthopedics PC | Past | Accepting new patients |
Locations
500 S University Ave
Ste 101
Little Rock, AR 72205
Phone (501) 686-2688
2750 Broadway St
Boulder, CO 80304
Phone (303) 440-3000
4747 Arapahoe Ave
Boulder, CO 80303
Phone (303) 415-7000
4740 Pearl Pkwy
Ste 110
Boulder, CO 80301
101 Erie Pkwy
Erie, CO 80516
Phone (303) 415-5170
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.
-
- Diagnostic Radiology Physician
- Boulder, CO
- NPI 1891756813
-
- Diagnostic Radiology Physician
- Little Rock, AR
- NPI 1366438186
-
- Orthopaedic Surgery Physician
- Boulder, CO
- NPI 1336197631
Hospital & facility affiliations 67
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Sleep Disorder Diagnostic Clinic/Center
- Boulder, CO
- NPI 1093357907
Hospital
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1371772800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770940800000",
"number": "1770922882",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "500 S UNIVERSITY AVE STE 101",
"city": "LITTLE ROCK",
"state": "AR",
"postal_code": "722055314",
"telephone_number": "501-664-3914",
"fax_number": "501-664-5246"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "500 S UNIVERSITY AVE STE 101",
"city": "LITTLE ROCK",
"state": "AR",
"postal_code": "722055314",
"telephone_number": "501-664-3914",
"fax_number": "501-664-5246"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LAMBERTSEN",
"first_name": "ZACHARY",
"middle_name": "A.",
"credential": "M.D.",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2013-06-21",
"last_updated": "2026-02-13",
"certification_date": "2026-02-13",
"status": "A"
},
"taxonomies": [
{
"code": "2085R0202X",
"taxonomy_group": "",
"desc": "Radiology, Diagnostic Radiology",
"state": "CO",
"license": "DR.0070667",
"primary": false
},
{
"code": "2085R0204X",
"taxonomy_group": "",
"desc": "Radiology, Vascular & Interventional Radiology",
"state": "CO",
"license": "DR.0070667",
"primary": false
},
{
"code": "2085R0202X",
"taxonomy_group": "",
"desc": "Radiology, Diagnostic Radiology",
"state": "AR",
"license": "E-12117",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Little Rock, AR
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.