Quick answers
- Does William J. Carroll Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Carroll 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 William J. Carroll Iii see?
- In 2024, CMS data shows 250 Original Medicare patients and 7,605 services for William J. Carroll Iii. This counts Original Medicare only and measures volume, not quality.
- What is William J. Carroll Iii's NPI number?
- 1659555258. 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 J. Carroll 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 | 250 |
|---|---|
| Services billed to Medicare | 7,605 |
| Different services or procedures | 71 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)5,523 services
- Aspiration and/or injection of fluid from large joint (20610)198 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)129 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)122 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)87 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 cholesterol75%
- Arthritis75%
- High blood pressure72%
- Ischemic heart disease30%
- Anxiety27%
- Osteoporosis22%
Hospitals where William J. Carroll Iii works
Medicare's Facility Affiliation Data lists William J. Carroll 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.
- Bon Secours-St Francis Xavier HospitalCharleston, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420065
- Mount Pleasant HospitalMount Pleasant, SC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 420104
- MUSC Medical CenterCharleston, SC · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 420004
- Roper HospitalCharleston, SC · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 420087
- Tidelands Georgetown Memorial HospitalGeorgetown, SC · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 420020
Practice locations
Addresses where William J. Carroll Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 2270 Ashley Crossing Dr, Suite 110Charleston, SC 29414 (843) 853‑3474
- 255 E Bay StCharleston, SC 29401 (843) 853‑3474
Group practices
Medicare enrollment lists William J. Carroll Iii as a member of this group (CMS data updated October 2, 2026).
- Roper Saint Francis Physicians Network528 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Charleston
Clinicians with the same Medicare primary specialty in Charleston, SC — not a recommendation.
Other clinicians in Roper Saint Francis Physicians Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1659555258 |
| 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