Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Critical Care (Intensivists)

James L. Vermaelen Iii, MD

Works at hospitals in Baton Rouge, LA · Louisiana

Summary

Dr. James L. Vermaelen Iii, MD is a critical care doctor at 5000 Hennessy Blvd, Baton Rouge, LA 70808. Accepts Medicare assignment. In 2024, James L. Vermaelen Iii had 150 Original Medicare patients and 325 services. NPI 1467693440. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Critical care doctor (Medicare lists Critical Care (Intensivists))
  • Address: 5000 Hennessy Blvd, Baton Rouge, LA 70808 · Directions (2 more locations)
  • Medicare: Accepts Medicare assignment
  • Hospital: Fmol Health | Our Lady of the Lake
  • Group practice: Our Lady of the Lake Physician Group LLC
  • Medical school: Louisiana State University School Of Medicine In New Orleans · graduated 2009 (17 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about James L. Vermaelen Iii, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does James L. Vermaelen Iii accept Medicare assignment?
Yes. Medicare's clinician data says James L. Vermaelen 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 James L. Vermaelen Iii see?
In 2024, CMS data shows 150 Original Medicare patients and 325 services for James L. Vermaelen Iii. This counts Original Medicare only and measures volume, not quality.
What is James L. Vermaelen Iii's NPI number?
1467693440. 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 James L. Vermaelen 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 patients150
Services billed to Medicare325
Different services or procedures21
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Critical care, first 30-74 minutes (99291)74 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)55 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)54 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)43 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)21 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%
  • Arthritis49%
  • Heart failure43%
  • Diabetes42%
  • Anxiety41%

Hospitals where James L. Vermaelen Iii works

Medicare's Facility Affiliation Data lists James L. Vermaelen 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.

Practice locations

Addresses where James L. Vermaelen Iii is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists James L. Vermaelen Iii as a member of this group (CMS data updated October 2, 2026).

  • Our Lady of the Lake Physician Group LLC644 clinicians in the group

Specialties

Find other Critical Care (Intensivists) doctors in Louisiana →

Other critical care doctors in Baton Rouge

Clinicians with the same Medicare primary specialty in Baton Rouge, LA — not a recommendation.

All critical care doctors in Baton Rouge →

Other clinicians in Our Lady of the Lake Physician Group LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolLouisiana State University School Of Medicine In New Orleans
Graduation year2009 (17 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1467693440
CorrectionsReport 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

  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