Quick answers
- Does Jeffrey P. Semeyn accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey P. Semeyn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Jeffrey P. Semeyn see?
- In 2024, CMS data shows 90 Original Medicare patients and 131 services for Jeffrey P. Semeyn. This counts Original Medicare only and measures volume, not quality.
- What is Jeffrey P. Semeyn's NPI number?
- 1598800609. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Jeffrey P. Semeyn, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 90 |
|---|---|
| Services billed to Medicare | 131 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Automated urinalysis test (81003)18 services
- X-ray of chest, 2 views (71046)16 services
- X-ray of abdomen, 1 view (74018)15 services
- X-ray of lower and sacral spine, 2-3 views (72100)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Chronic kidney disease40%
- Diabetes33%
- Ischemic heart disease29%
Hospitals where Jeffrey P. Semeyn works
Medicare's Facility Affiliation Data lists Jeffrey P. Semeyn at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy Hospital LebanonLebanon, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260059
- Mercy Hospital SpringfieldSpringfield, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260065
- Phelps County Regional Medical CenterRolla, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260017
Practice locations
Addresses where Jeffrey P. Semeyn is enrolled with Medicare (CMS data updated October 2, 2026).
- 1605 Martin Springs DrRolla, MO 65401
- 608 Old Route 66Saint Robert, MO 65584
- 904 S Pine StRichland, MO 65556 (573) 765‑2956
- 904 S Pine St, Mc Family Medicine RichlandRichland, MO 65556 (573) 765‑2956
Group practices
Medicare enrollment lists Jeffrey P. Semeyn as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Springfield Communities1,120 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Rolla
Clinicians with the same Medicare primary specialty in Rolla, MO — not a recommendation.
Other clinicians in Mercy Clinic Springfield Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598800609 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians