Margaret Melissa Loayza, CRNA
NPI 1508272709ActiveIndividual· Nurse Anesthetist, Certified Registered· Golden, CO
Nurse Anesthetist, Certified Registered (CRNA) with University of Texas Southwestern Medical Center at Dallas, practicing in Golden, Colorado. Medicare paid $16,275 for services to 133 patients in 2024. Merck Sharp & Dohme LLC reported $28.71 in payments in 2025, mostly food and beverage. Lists Ut of Texas Southwestern University Hospital - William P. Clements Jr. as a hospital affiliation.
Overview
| NPI | 1508272709 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNA |
| Sole proprietor | No |
| NPI issued | Jul 8, 2014 |
| Last updated in NPPES | Sep 24, 2026 |
| Certified by provider | Sep 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Anesthetist, Certified Registered Primary | 367500000X | C-APN.0104768-C-CRNA | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Certified Registered Nurse Anesthetist (CRNA) (CO); Practitioner - Certified Registered Nurse Anesthetist (CRNA) (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 133 |
|---|---|
| Services billed | 140 across 38 procedure codes |
| Paid by Medicare | $16,275 |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Certified Registered Nurse Anesthetist (Crna) |
Medical group
- University of Texas Southwestern Medical Center at DallasDallas, TX · 3,187 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$28.71 · 1 payment from 1 company
- 2024$242.38 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $28.71 | 1 |
What the 2025 payments were for
- Food and Beverage$28.71 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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