Active NPI
Rehaan Mujtaba Ahsan, M.D.
- Anesthesiology Physician
- Warrenton, VA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anesthesiology Physician
- License
- 0101231465
- Practice address
- 500 Hospital Dr.
Fauquier Hospital
Warrenton, VA 20186 - Phone
- (540) 316-5000
- NPI assigned
- Nov 22, 2006
- Last updated
- Sep 18, 2025
- 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Anesthesiology Physician | 207L00000X | 0101231465 | VA | Primary |
Addresses
Primary practice location
500 Hospital Dr.
Fauquier Hospital
Warrenton, VA 20186
Mailing address
3998 Fair Ridge Dr Ste 300
Fairfax, VA 22033-2907
Phone (703) 766-9737
Other names 1
- Mujtaba Ahsan Ansari
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in VA
- 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
- Anesthesiology
- Education
- Other, 1992
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
1305 Walt Whitman Rd
Suite 300
Melville, NY 11747-4300
1602 Skipwith Rd
Henrico, VA 23229-5205
Phone (804) 289-4500
19455 Deerfield Ave
Suite 204
Leesburg, VA 20176-8102
Phone (703) 724-9950
7700 E Parham Rd
Henrico, VA 23294-4301
Phone (804) 747-5600
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| North American Partners in Anesthesia New Hampshire LLP | Anesthesiology | Past | Accepting new patients |
| La Porte County Anesthesia Associates LLC | Anesthesiology | Past | Accepting new patients |
| Northeast Indiana Anesthesiology, PC | Anesthesiology | Past | Accepting new patients |
| Manassas Anesthesia Associates PC | Past | Accepting new patients | |
| Northeast Indiana Colon Rectal Surgeons PC | Past | Accepting new patients |
Organizations & group practices 6
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.
-
- Anesthesiology Physician
- Falls Church, VA
- NPI 1417994872
-
- Specialist
- Manassas, VA
- NPI 1871522466
-
- Anesthesiology Physician
- Michigan City, IN
- NPI 1477553634
-
- Anesthesiology Physician
- Nashua, NH
- NPI 1306838701
-
- Anesthesiology Physician
- Columbia City, IN
- NPI 1619917366
-
- Colon & Rectal Surgery Physician
- Fort Wayne, IN
- NPI 1912998014
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba Henrico Doctors' Hospital
- General Acute Care Hospital
- Richmond, VA
- NPI 1194762294
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1164153600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1758153600000",
"number": "1558436733",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3998 FAIR RIDGE DR STE 300",
"city": "FAIRFAX",
"state": "VA",
"postal_code": "220332907",
"telephone_number": "703-766-9737",
"fax_number": "703-766-9725"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "500 HOSPITAL DR.",
"address_2": "FAUQUIER HOSPITAL",
"city": "WARRENTON",
"state": "VA",
"postal_code": "20186",
"telephone_number": "540-316-5000"
}
],
"practiceLocations": [],
"basic": {
"last_name": "AHSAN",
"first_name": "REHAAN",
"middle_name": "MUJTABA",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-11-22",
"last_updated": "2025-09-18",
"certification_date": "2025-09-18",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "",
"desc": "Anesthesiology",
"state": "VA",
"license": "0101231465",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"first_name": "MUJTABA",
"last_name": "ANSARI",
"middle_name": "AHSAN",
"credential": "MD",
"code": "1",
"type": "Former Name"
}
]
}
Other providers in Warrenton, VA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 18, 2025; 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.