Bryan C. Gieszl, MD
NPI 1881644649ActiveIndividual· Internal Medicine· Aspen, CO
Internal Medicine (MD) in Aspen, Colorado, trained at University of California, Geffen School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $218,021 for 3,311 claims, against $117,098 paid for services in 2024. Pfizer Inc. was the largest of 5 companies reporting payments in 2025, $161.17 in all, mostly food and beverage.
Overview
| NPI | 1881644649 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 11, 2006 |
| Last updated in NPPES | Nov 21, 2025 |
| Certified by provider | Nov 21, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 44470 | 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 - Internal Medicine (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 479 |
|---|---|
| Services billed | 2,169 across 41 procedure codes |
| Paid by Medicare | $117,098 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,311 · 6,516 30-day fills |
|---|---|
| Patients | 412 |
| Total drug cost | $218,021 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Aspen Valley Hospital Clinics, PLLCBasalt, CO · 23 clinicians
Hospital affiliations
- Aspen Valley Hospital DistrictAspen, CO
- Valley View Hospital AssociationGlenwood Springs, CO
Industry payments (Open Payments)
- 2025$161.17 · 7 payments from 5 companies
- 2024$185.75 · 8 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $73.48 | 3 |
| Exact Sciences Corporation | $25.12 | 1 |
| Abbvie Inc. | $24.98 | 1 |
| Amgen Inc. | $22.09 | 1 |
| Lilly USA, LLC | $15.50 | 1 |
What the 2025 payments were for
- Food and Beverage$161.17 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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