Quick answers
- Does Charles P. Coyne Iii accept Medicare assignment?
- Yes. Medicare's clinician data says Charles P. Coyne Iii 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 Charles P. Coyne Iii see?
- In 2024, CMS data shows 214 Original Medicare patients and 990 services for Charles P. Coyne Iii. This counts Original Medicare only and measures volume, not quality.
- What is Charles P. Coyne Iii's NPI number?
- 1295048031. 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 Charles P. Coyne Iii, 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 | 214 |
|---|---|
| Services billed to Medicare | 990 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)295 services
- Insertion of needle into vein for collection of blood sample (36415)168 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)83 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)38 services
- Administration of influenza virus vaccine (G0008)27 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 pressure69%
- High cholesterol64%
- Arthritis44%
- Diabetes27%
- Anxiety25%
- Chronic kidney disease23%
Hospitals where Charles P. Coyne Iii works
Medicare's Facility Affiliation Data lists Charles P. Coyne Iii 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 LincolnTroy, MO · Critical Access Hospital · Emergency services: listed by Medicare · CCN 261319
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260052
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260179
Practice locations
Addresses where Charles P. Coyne Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1502 W Meyer RdWentzville, MO 63385 (636) 698‑6266
- 7212 Balson AveSaint Louis, MO 63130
Group practices
Medicare enrollment lists Charles P. Coyne Iii as a member of these groups (CMS data updated October 2, 2026).
- Mercy Clinic East Communities571 clinicians in the group
- Aging Well Health Care, LLC238 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Wentzville
Clinicians with the same Medicare primary specialty in Wentzville, MO — not a recommendation.
Other clinicians in Mercy Clinic East Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1295048031 |
| 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