Quick answers
- Does Karl A. Duncan accept Medicare assignment?
- Yes. Medicare's clinician data says Karl A. Duncan 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 Karl A. Duncan see?
- In 2024, CMS data shows 1,370 Original Medicare patients and 3,033 services for Karl A. Duncan. This counts Original Medicare only and measures volume, not quality.
- What is Karl A. Duncan's NPI number?
- 1265465017. 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 Karl A. Duncan, 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 | 1,370 |
|---|---|
| Services billed to Medicare | 3,033 |
| Different services or procedures | 69 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)1,127 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)396 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)396 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)226 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)133 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%
- Arthritis53%
- Ischemic heart disease50%
- Diabetes44%
- Chronic kidney disease43%
Hospitals where Karl A. Duncan works
Medicare's Facility Affiliation Data lists Karl A. Duncan 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.
- Beauregard Memorial HospitalDeridder, LA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 190050
- Lake Charles Memorial HospitalLake Charles, LA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 190060
- West Calcasieu Cameron HospitalSulphur, LA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 190013
Practice locations
Addresses where Karl A. Duncan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1717 Oak Park Blvd, Fl 2Lake Charles, LA 70601 (337) 494‑3278
Group practices
Medicare enrollment lists Karl A. Duncan as a member of this group (CMS data updated October 2, 2026).
- Lake Charles Memorial Heart and Vascular Center14 clinicians in the group
Specialties
Other internal medicine doctors in Lake Charles
Clinicians with the same Medicare primary specialty in Lake Charles, LA — not a recommendation.
Other clinicians in Lake Charles Memorial Heart and Vascular Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Louisiana State University School Of Medicine In New Orleans |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265465017 |
| 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