Daniel O. Siegel, MD
NPI 1174518344ActiveIndividual· Internal Medicine, Gastroenterology· Denver, CO
Internal Medicine, Gastroenterology (MD) in Denver, Colorado, trained at Icahn School of Medicine at Mount Sinai (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $663,378 for 1,621 claims, against $166,816 paid for services in 2024. Abbvie Inc. was the largest of 5 companies reporting payments in 2025, $594.36 in all, mostly food and beverage.
Overview
| NPI | 1174518344 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 14, 2005 |
| Last updated in NPPES | Sep 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 35377 | CO |
| Internal Medicine | 207R00000X | 35377 | 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 | 409 |
|---|---|
| Services billed | 5,661 across 42 procedure codes |
| Paid by Medicare | $166,816 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,621 · 3,082 30-day fills |
|---|---|
| Patients | 391 |
| Total drug cost | $663,378 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Icahn School of Medicine at Mount Sinai |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Denver Digestive Health Specialists IncDenver, CO · 20 clinicians
Hospital affiliation
- HCA Healthone RoseDenver, CO
Industry payments (Open Payments)
- 2025$594.36 · 20 payments from 5 companies
- 2024$859.98 · 47 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $218.03 | 11 |
| Lilly USA, LLC | $166.07 | 5 |
| Madrigal Pharmaceuticals | $150.82 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $37.15 | 1 |
| Intercept Pharmaceuticals, Inc. | $22.29 | 1 |
What the 2025 payments were for
- Food and Beverage$594.36 · 20 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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