Quick answers
- Does William R. Logan accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Logan 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. Logan see?
- In 2024, CMS data shows 392 Original Medicare patients and 480 services for William R. Logan. This counts Original Medicare only and measures volume, not quality.
- What is William R. Logan's NPI number?
- 1750311395. 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. Logan, 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 | 392 |
|---|---|
| Services billed to Medicare | 480 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional (95720)80 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)78 services
- Measurement of brain wave activity (eeg), awake and drowsy (95816)66 services
- Measurement of brain wave activity (eeg), awake and asleep (95819)63 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)53 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%
- Arthritis55%
- Anxiety47%
- Depression45%
- Chronic kidney disease44%
Hospitals where William R. Logan works
Medicare's Facility Affiliation Data lists William R. Logan 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 Ardmore, IncArdmore, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370047
- Mercy Hospital Fort SmithFort Smith, AR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 040062
- Mercy Hospital JoplinJoplin, MO · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 260001
- 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
Practice locations
Addresses where William R. Logan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1001 Woodfield Estates DrChesterfield, MO 63017 (636) 237‑4700
- 615 S New Ballas RdSt Louis, MO 63141
- 621 S New Ballas RdSaint Louis, MO 63141
- 621 S New Ballas Rd, Suite 6005bSaint Louis, MO 63141 (314) 251‑8892
Group practices
Medicare enrollment lists William R. Logan as a member of these groups (CMS data updated October 2, 2026).
- Mercy Aco Clinical Services Inc170 clinicians in the group
- Mercy Clinic Neurology, LLC20 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Other clinicians in Mercy Aco Clinical Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750311395 |
| 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