Peter Nissen Chalmers, MD
NPI 1518288323ActiveIndividual· Orthopaedic Surgery· Saint Louis, MO
Orthopaedic Surgery (MD) in Saint Louis, Missouri, trained at University of Missouri, Columbia School of Medicine (class of 2010). 222 Medicare patients in 2024, $82,235 paid; nearly all of their 202 Part D prescriptions were generic (92%). Exactech, Inc. was the largest of 6 companies reporting payments in 2025, $183,593 in all, mostly consulting fees.
Overview
| NPI | 1518288323 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 15, 2010 |
| Last updated in NPPES | Nov 11, 2021 |
| Certified by provider | Nov 11, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 2015005950 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (UT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 222 |
|---|---|
| Services billed | 494 across 28 procedure codes |
| Paid by Medicare | $82,235 |
Part D prescriptions in 2024
| Prescriptions (claims) | 202 · 210 30-day fills |
|---|---|
| Patients | 56 |
| Total drug cost | $2,838 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Orthopedic Surgery |
| Telehealth | Offers telehealth |
Medical group
- University of Utah Adult ServicesFarmington, UT · 1,788 clinicians
Hospital affiliation
- University of Utah Hospital and ClinicsSalt Lake City, UT
Other facilities
- Community Nursing ServicesHome health agency · West Valley City, UT
Industry payments (Open Payments)
- 2025$183,593 · 101 payments from 6 companies
- 2024$120,614 · 83 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exactech, Inc. | $99,437 | 43 |
| Medical Device Business Services, Inc. | $65,810 | 41 |
| Depuy Synthes Products, Inc. | $15,272 | 11 |
| Responsive Arthroscopy Inc | $2,335 | 4 |
| Advita Ortho, LLC | $650.00 | 1 |
What the 2025 payments were for
- Consulting Fee$161,017 · 32 payments
- Travel and Lodging$17,011 · 34 payments
- Food and Beverage$3,229 · 31 payments
- Royalty or License$2,335 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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