James S. Powell Ii, MD

Medicare activity in 2024

Official CMS public-use data for James S. Powell Ii, 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.

Most frequent services

1. Anesthesia for other procedure on large bowel using an endoscope (00811)121 services
2. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)39 services
3. Anesthesia for other procedure on urinary system through urethra (00910)20 services
4. Anesthesia for procedure on small and large bowel using an endoscope (00813)16 services
5. Anesthesia for other procedure on lower abdomen (00840)14 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%
• Arthritis51%
• Diabetes32%
• Anxiety28%
• Ischemic heart disease23%

Hospitals where James S. Powell Ii works

Medicare's Facility Affiliation Data lists James S. Powell Ii 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.

• Anderson HospitalMaryville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140289

Practice locations

Addresses where James S. Powell Ii is enrolled with Medicare (CMS data updated October 2, 2026).

• 144 E Eatherton Rd, 3rd FloorChesterfield, MO 63005 (314) 492‑1112
• 6800 State Route 162Maryville, IL 62062 (618) 288‑5711

Group practices

Medicare enrollment lists James S. Powell Ii as a member of these groups (CMS data updated October 2, 2026).

• Millennium Anesthesiology Consultants, LLC17 clinicians in the group
• Millennium Anesthesiology Consultants LLC6 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Missouri →

Other anesthesiologists in Chesterfield

Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.

• Frederick W. Wagner, MD
• Adnan Kaziz, MD
• Kumiko T. Shimoda, MD
• Johanna J. Kang, MD
• Roselyn D. Lampkins, MD
• Mohammad F. Bashiti, MD
• Keith Krummenacher, MD
• Pei Zhang, MD

All anesthesiologists in Chesterfield →

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians