Christopher Barclay Hamm, M.D.
NPI 1730490830ActiveIndividual· Internal Medicine· Des Peres, MO
Internal Medicine (M.D.) with Mercy Clinic East Communities, practicing in Des Peres, Missouri. Their prescriptions cost Medicare Part D more than their services did: $1,710,517 for 17,650 claims, against $157,067 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $108.49 in all, mostly food and beverage. Lists Mercy Hospital Jefferson and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1730490830 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2010 |
| Last updated in NPPES | Jan 23, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2010019752 | 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 | 468 |
|---|---|
| Services billed | 2,077 across 36 procedure codes |
| Paid by Medicare | $157,067 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17,650 · 42,911 30-day fills |
|---|---|
| Patients | 1,137 |
| Total drug cost | $1,710,517 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mercy Clinic East CommunitiesSaint Louis, MO · 571 clinicians
Hospital affiliations
- Mercy Hospital JeffersonCrystal City, MO
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
- Missouri Baptist Medical CenterSaint Louis, MO
- St Lukes HospitalChesterfield, MO
Other facilities
- Mercy Home HealthHome health agency · Saint Louis, MO
- Mercy HospiceHospice · Saint Louis, MO
- Ssm Health Rehabilitation HospitalInpatient rehabilitation facility · Richmond Heights, MO
Industry payments (Open Payments)
- 2025$108.49 · 5 payments from 4 companies
- 2024$14.99 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $44.07 | 2 |
| Abbott Laboratories | $22.91 | 1 |
| Lilly USA, LLC | $22.68 | 1 |
| Glaxosmithkline, LLC. | $18.83 | 1 |
What the 2025 payments were for
- Food and Beverage$108.49 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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