Matthew R. Williams, MD
NPI 1184121998ActiveIndividual· Internal Medicine· Springfield, MO
Internal Medicine (MD) with Mercy Clinic Springfield Communities, practicing in Springfield, Missouri. Their prescriptions cost Medicare Part D more than their services did: $1,463,818 for 16,189 claims, against $94,194 paid for services in 2024. Lilly USA, LLC was the largest of 7 companies reporting payments in 2025, $184.94 in all, mostly food and beverage. Lists Mercy Hospital Aurora and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1184121998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 9, 2018 |
| Last updated in NPPES | Jul 29, 2021 |
| Certified by provider | Jul 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2021025620 | MO |
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 (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 303 |
|---|---|
| Services billed | 2,512 across 61 procedure codes |
| Paid by Medicare | $94,194 |
Part D prescriptions in 2024
| Prescriptions (claims) | 16,189 · 34,344 30-day fills |
|---|---|
| Patients | 1,238 |
| Total drug cost | $1,463,818 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mercy Clinic Springfield CommunitiesLebanon, MO · 1,120 clinicians
Hospital affiliations
- Mercy Hospital AuroraAurora, MO
- Mercy Hospital LebanonLebanon, MO
- Mercy Hospital SpringfieldSpringfield, MO
Other facilities
- Integrity Home Care + HospiceHome health agency · Springfield, MO
- Terrace Home HealthHome health agency · Springfield, MO
Industry payments (Open Payments)
- 2025$184.94 · 11 payments from 7 companies
- 2024$157.99 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $67.44 | 3 |
| Electromed, Inc. | $22.70 | 3 |
| Abbott Laboratories | $20.68 | 1 |
| Dexcom, Inc. | $19.67 | 1 |
| Exact Sciences Corporation | $18.65 | 1 |
What the 2025 payments were for
- Food and Beverage$184.94 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 155 internal medicine physicians in Springfield · All internal medicine physicians in Missouri