Active NPI
Mark Orman Hardin, M.D.
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- Little Rock, AR
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- License
- E-14521
- Practice address
- 9601 Baptist Health Dr Ste 200
Little Rock, AR 72205-6342 - Phone
- (501) 223-2860
- Fax
- (501) 223-2258
- NPI assigned
- Jun 19, 2007
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician | 208G00000X | E-14521 | AR | Primary |
| Surgery Physician | 208600000X | E-14521 | AR |
Addresses
Primary practice location
9601 Baptist Health Dr Ste 200
Little Rock, AR 72205-6342
Mailing address
11001 Executive Center Dr Ste 200
Little Rock, AR 72211-4393
Phone (501) 223-2860
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in AR
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Thoracic Surgery
- Education
- University of Arkansas College of Medicine, 2007
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
4301 W Markam St
Little Rock, AR 72205-7101
Phone (501) 686-8000
9601 Baptist Health Dr
Suite 200
Little Rock, AR 72205-6342
Phone (501) 223-2860
Hospital & facility affiliations
- University of Arkansas Medical Sciences
- Baptist Health Medical Center-Little Rock
- Baptist Health Medical Center North Little Rock
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Coronary artery bypass graft (CABG) | 17 |
| Pacemaker insertion or repair | 1-10 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| E-14521 | AR | MD | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| University of Arkansas for Medical Sciences | Current | Accepting new patients | |
| Arkansas Health Group | Surgery | Current | Accepting new patients |
| Arkansas Heart Hospital Rural Health Services, LLC | Current | Accepting new patients | |
| University of Arkansas for Medical Sciences | Current | Accepting new patients | |
| Arkansas Health Group | Surgery | Current | Accepting new patients |
| University of Arkansas for Medical Sciences | Surgery | Current | Accepting new patients |
| Arkansas Heart Hospital, LLC | Current | Accepting new patients | |
| Arkansas Heart Hospital, LLC | Current | Accepting new patients |
Locations
4301 W Markham St
#783
Little Rock, AR 72205
Phone (501) 603-1278
11001 Executive Center Dr
Ste 200
Little Rock, AR 72211
Phone (501) 812-7215
9601 Baptist Health Dr
Ste 200
Little Rock, AR 72205
Phone (501) 224-5666
7 Shackleford West Blvd
Little Rock, AR 72211
Phone (501) 614-3671
4301 W Markham St
Little Rock, AR 72205
Phone (501) 603-1278
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 and National Provider Directory roles.
-
- Surgery Physician
- Little Rock, AR
- NPI 1215275508
-
- Internal Medicine Physician
- Little Rock, AR
- NPI 1588654016
Surgery
-
- Cardiovascular Disease Physician
- Little Rock, AR
- NPI 1548553811
-
- Cardiovascular Disease Physician
- Little Rock, AR
- NPI 1558653212
-
- Surgery Physician
- Stuttgart, AR
- NPI 1952840555
-
- General Acute Care Hospital
- Bryant, AR
- NPI 1841898293
-
- Family Medicine Physician
- El Dorado, AR
- NPI 1023795051
-
- Family Medicine Physician
- Little Rock, AR
- NPI 1124791181
Hospital & facility affiliations 3
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Little Rock, AR
- NPI 1043240682
-
- General Acute Care Hospital
- North Little Rock, AR
- NPI 1497790042
-
- General Acute Care Hospital
- Little Rock, AR
- NPI 1477549756
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1182211200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1782259200000",
"number": "1861697815",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "11001 EXECUTIVE CENTER DR STE 200",
"city": "LITTLE ROCK",
"state": "AR",
"postal_code": "722114393",
"telephone_number": "501-223-2860",
"fax_number": "501-223-2258"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "9601 BAPTIST HEALTH DR STE 200",
"city": "LITTLE ROCK",
"state": "AR",
"postal_code": "722056342",
"telephone_number": "501-223-2860",
"fax_number": "501-223-2258"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HARDIN",
"first_name": "MARK",
"middle_name": "ORMAN",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2007-06-19",
"last_updated": "2026-06-24",
"certification_date": "2026-06-24",
"status": "A"
},
"taxonomies": [
{
"code": "208G00000X",
"taxonomy_group": "",
"desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
"state": "AR",
"license": "E-14521",
"primary": true
},
{
"code": "208600000X",
"taxonomy_group": "",
"desc": "Surgery",
"state": "AR",
"license": "E-14521",
"primary": false
}
],
"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 Jun 24, 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.