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GREGOR MASSOTH
NPI 1235081084
Anesthesiology in Dallas, TX

Active since February 13, 2026PECOS EnrolledAccepts Medicare Assignment
5323 HARRY HINES BLVD STOP 7200, DALLAS, TX 75390(214) 648-5461 Get Directions Write a Review

NPPES record last updated: February 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gregor Massoth NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGOR MASSOTH (NPI 1235081084) is an individual anesthesiology provider in Dallas, Texas, licensed in Texas (48842) and active in the NPI registry since February 2026. He is enrolled in Medicare PECOS, is affiliated with Ut Southwestern University Hospital - William P. Clements Jr., and is a graduate of Other (2013).

NPPES Registry Identity

NPI1235081084
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameGREGOR MASSOTH
Location Address5323 HARRY HINES BLVD STOP 7200Dallas, TX 75390-9068
Mailing Address5323 Harry Hines Blvd Stop 7200Dallas, TX 75390-9068 · (214) 648-5461
Phone(214) 648-5461
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateFebruary 13, 2026
NPPES CertifiedFebruary 13, 2026
✔ NPI 1235081084 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in TX · 48842
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
5323 HARRY HINES BLVD STOP 7200, Dallas, TX 75390
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregor Massoth is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002391943
PECOS Enrollment IDI20260330001656
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

5/5 CMS rating
OwnershipGovernment - State
CMS Certification Number450044
Location6201 Harry Hines BlvdDallas, TX 75390 · Dallas County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JOSEPH KASSAB MD, MS
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-3111
LEXUS DELICIA WILSON
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-1500
DR. MAAZ AHSAN MD
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-3433
DANIELA ALVAREZ
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-2168
ACILE NAHLAWI MD
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-3433
DR. BRANDON WEST YOUSSI MD
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-3433
KAILYN MAI LE PA-C
Student in an Organized Health Care Education/Training Program
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-1701
DR. ASHLYN RENEE TERRELL DO
Anesthesiology
5323 HARRY HINES BLVD STOP 7200
DALLAS, TX 75390
Dallas County (214) 648-6800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregor Massoth's NPI number?

The NPI number for Gregor Massoth is 1235081084. It was assigned to this individual provider in the NPPES registry on February 13, 2026.

Where is Gregor Massoth located?

Gregor Massoth practices at 5323 Harry Hines Blvd Stop 7200, Dallas, TX 75390. The listed phone number is (214) 648-5461.

What is Gregor Massoth's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Gregor Massoth enrolled in Medicare?

Yes. Gregor Massoth is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Gregor Massoth affiliated with any hospitals?

According to CMS data, Gregor Massoth is affiliated with Ut Southwestern University Hospital - William P. Clements Jr..

When was this NPI record last updated?

The NPPES record for Gregor Massoth was last updated on February 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.