Quick answers
- Does William R. Silliman accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Silliman 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 William R. Silliman see?
- In 2024, CMS data shows 479 Original Medicare patients and 1,115 services for William R. Silliman. This counts Original Medicare only and measures volume, not quality.
- What is William R. Silliman's NPI number?
- 1174552954. 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 William R. Silliman, 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 | 479 |
|---|---|
| Services billed to Medicare | 1,115 |
| Different services or procedures | 119 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)198 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)86 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)78 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)44 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)42 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 cholesterol74%
- Arthritis52%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)36%
- Diabetes34%
- Anxiety31%
Hospitals where William R. Silliman works
Medicare's Facility Affiliation Data lists William R. Silliman 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 PerryPerryville, MO · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 261311
- Mercy Hospital SoutheastCape Girardeau, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260110
- Mercy Hospital StoddardDexter, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260160
Practice locations
Addresses where William R. Silliman is enrolled with Medicare (CMS data updated October 2, 2026).
- 1200 N One Mile RdDexter, MO 63841
- 1200 N One Mile Rd, Southeast Health Center of StoddardDexter, MO 63841 (573) 614‑1900
- 1300 N One Mile, Suite 3Dexter, MO 63841
- 650 S Mount Auburn Rd, 100a Mercy Breast SurgCape Girardeau, MO 63703 (573) 519‑4898
Group practices
Medicare enrollment lists William R. Silliman as a member of these groups (CMS data updated October 2, 2026).
- Southeast Missouri Hospital Physicians LLC209 clinicians in the group
- Southeast Health Center of Stoddard County LLC43 clinicians in the group
- Dexter Hospital, LLC16 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Other clinicians in Southeast Missouri Hospital Physicians LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Columbia School Of Medicine |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174552954 |
| 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