Active NPI
Gregor Massoth
- Anesthesiology Physician
- Dallas, TX
National Provider Identifier
1235081084
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anesthesiology Physician
- License
- 48842
- Practice address
- 5323 Harry Hines Blvd Stop 7200
Dallas, TX 75390-9068 - Phone
- (214) 648-5461
- NPI assigned
- Feb 13, 2026
- 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 | 48842 | TX | Primary |
Addresses
Primary practice location
5323 Harry Hines Blvd Stop 7200
Dallas, TX 75390-9068
Mailing address
5323 Harry Hines Blvd Stop 7200
Dallas, TX 75390-9068
Phone (214) 648-5461
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in TX
- 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, 2013
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
6202 Harry Hines Blvd
Dallas, TX 75390-9293
Phone (817) 987-3955
Hospital & facility affiliations
- Ut of Texas Southwestern University Hospital - William P. Clements Jr.
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 48842 | TX | MD | Anesthesiology Physician |
Organizations & group practices 1
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.
-
- Anesthesiology Physician
- Dallas, TX
- NPI 1942270566
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Dallas, TX
- NPI 1285798918
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1770940800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770940800000",
"number": "1235081084",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "5323 HARRY HINES BLVD STOP 7200",
"city": "DALLAS",
"state": "TX",
"postal_code": "753909068",
"telephone_number": "214-648-5461"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5323 HARRY HINES BLVD STOP 7200",
"city": "DALLAS",
"state": "TX",
"postal_code": "753909068",
"telephone_number": "214-648-5461"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MASSOTH",
"first_name": "GREGOR",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2026-02-13",
"last_updated": "2026-02-13",
"certification_date": "2026-02-13",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "",
"desc": "Anesthesiology",
"state": "TX",
"license": "48842",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Dallas, TX
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.