Dr. Michael Barker JR., MD
Gastroenterology (Gastroenterology Physician)
9103 Jefferson Hwy
Baton Rouge, LA 70809
Who else practices at this address →
East Baton Rouge Parish includes primary care (46% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Louisiana State University School of Medicine in Shreveport (2014)
- Years since graduation
- 12
- In the NPI registry since
- 2014
- Medicare patients seen, 2024
- 275
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2014Medical school: Louisiana State University School of Medicine in Shreveport
- 2014Registered with an NPI (national billing number; not a license date)
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Gastroenterology Physician primary
LA license MD.208206 -
Internal Medicine Physician
AL license 37134 · LA license MD.208206
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Our Lady of the Lake Regional Medical Center Baton Rouge, LA
- Baton Rouge General Medical Center Baton Rouge, LA
- Womans Hospital Baton Rouge, LA
Medical groups
- Texas Digestive Disease Consultants, PLLC (608 clinicians)
- Lsuhn Billing LLC (206 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 275
- Services billed
- 4,733
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | 120 | 15 |
| Established patient office or other outpatient visit, 20-29 minutes | 81 | 69 |
| Established patient office or other outpatient visit, 30-39 minutes | 75 | 57 |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 70 | 15 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 45 | 43 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 36 | 25 |
| New patient office or other outpatient visit, 30-44 minutes | 35 | 35 |
| Biopsy of large bowel using a flexible endoscope | 35 | 34 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 35 | 34 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 25 | 25 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Pantoprazole Sodium Other prescribers in Baton Rouge, LA | 256 |
| Omeprazole Other prescribers in Baton Rouge, LA | 220 |
| Linzess (linaclotide) Other prescribers in Baton Rouge, LA | 71 |
| Ondansetron Odt (ondansetron) Other prescribers in Baton Rouge, LA | 61 |
| Dicyclomine Hcl Other prescribers in Baton Rouge, LA | 50 |
| Famotidine Other prescribers in Baton Rouge, LA | 33 |
| Sutab (sod sulf/pot chloride/mag sulf) | 33 |
| Colestipol Hcl Other prescribers in Baton Rouge, LA | 31 |
| Creon (lipase/protease/amylase) Other prescribers in Baton Rouge, LA | 28 |
| Sod Sulf-Potass Sulf-Mag Sulf (sodium, potassium,mag sulfates) Other prescribers in Baton Rouge, LA | 26 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 17 companies reported 99 payments worth $1,819 in total to this clinician.
| AbbVie Inc. | $613 |
|---|---|
| Janssen Biotech, Inc. | $299 |
| Madrigal Pharmaceuticals | $155 |
| Ardelyx, Inc. | $154 |
| Genzyme Corporation | $90.35 |
| Pfizer Inc. | $77.35 |
| Takeda Pharmaceuticals U.S.A., Inc. | $70.78 |
| Celltrion USA Inc. | $65.18 |
| Food and Beverage | $1,819 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 2 industry-funded studies in 2025, from 2 companies. The companies reported $36,200 in research payments for these studies, mostly to the institutions running them.
- A Study of Long-term Effects of Vedolizumab Subcutaneous in Adults With Ulcerative Colitis and Crohn's Disease
Takeda Pharmaceuticals U.S.A., Inc. · Completed · NCT02620046 - A Study to Evaluate the Long-Term Efficacy and Safety of Mirikizumab in Participants With Moderately to Severely Active Ulcerative Colitis (LUCENT 3)
Eli Lilly and Company · Active, not recruiting · NCT03519945
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.