Douglas Adam Mills, D.O.
NPI 1043519481ActiveIndividual· Internal Medicine· Park Ridge, IL
Internal Medicine (D.O.) in Park Ridge, Illinois, trained at Midwestern University, Chicago College of Osteopathic Med (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $694,441 for 1,040 claims, against $117,377 paid for services in 2024. Abbvie Inc. was the largest of 17 companies reporting payments in 2025, $1,195 in all, mostly food and beverage.
Overview
| NPI | 1043519481 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Mar 24, 2011 |
| Last updated in NPPES | Jul 4, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 125.059684 | IL |
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 - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 345 |
|---|---|
| Services billed | 3,133 across 40 procedure codes |
| Paid by Medicare | $117,377 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,040 · 1,554 30-day fills |
|---|---|
| Patients | 382 |
| Total drug cost | $694,441 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Gastroenterology |
Medical group
- Texas Digestive Disease Consultants, PLLCFlower Mound, TX · 608 clinicians
Hospital affiliation
- Texas Health Harris Methodist Hospital Southwest FFort Worth, TX
Industry payments (Open Payments)
- 2025$1,195 · 55 payments from 17 companies
- 2024$1,177 · 56 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $440.37 | 21 |
| Madrigal Pharmaceuticals | $116.17 | 5 |
| Takeda Pharmaceuticals U.S.A., Inc. | $113.51 | 4 |
| Janssen Biotech, Inc. | $87.83 | 5 |
| Qol Medical, LLC | $69.31 | 2 |
What the 2025 payments were for
- Food and Beverage$1,195 · 55 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 172 internal medicine physicians in Park Ridge · All internal medicine physicians in Illinois