Quick answers
- Does William G. Carlos Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William G. Carlos 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 G. Carlos Iii see?
- In 2024, CMS data shows 86 Original Medicare patients and 215 services for William G. Carlos Iii. This counts Original Medicare only and measures volume, not quality.
- What is William G. Carlos Iii's NPI number?
- 1245403427. 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 G. Carlos 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 | 86 |
|---|---|
| Services billed to Medicare | 215 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 66 |
Most frequent services
- Critical care, first 30-74 minutes (99291)66 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)41 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)17 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)14 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)12 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 cholesterol65%
- COPD59%
- Diabetes50%
- Depression49%
- Heart failure45%
Hospitals where William G. Carlos Iii works
Medicare's Facility Affiliation Data lists William G. Carlos 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.
- Ascension St Vincent HospitalIndianapolis, IN · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 150084
- Eskenazi HealthIndianapolis, IN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 150024
Practice locations
Addresses where William G. Carlos Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1701 N Senate BlvdIndianapolis, IN 46202 (888) 484‑3258
- 8333 Naab Rd, Suite 250Indianapolis, IN 46260 (317) 338‑5100
Group practices
Medicare enrollment lists William G. Carlos Iii as a member of these groups (CMS data updated October 2, 2026).
- IU Health Medical Group LLC4,462 clinicians in the group
- St Vincent Medical Group Inc736 clinicians in the group
Specialties
Other pulmonologists in Indianapolis
Clinicians with the same Medicare primary specialty in Indianapolis, IN — not a recommendation.
Other clinicians in IU Health Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245403427 |
| 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