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Obstetrics/Gynecology

Louis G. Monnig, MD

Works at hospitals in New Orleans, LA · Louisiana

Summary

Dr. Louis G. Monnig, MD is an OB-GYN at 120 Ochsner Blvd, Gretna, LA 70056. Phone: (504) 366-5032. Accepts Medicare assignment. In 2024, Louis G. Monnig had 15 Original Medicare patients and 27 services. NPI 1336609262. 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: OB-GYN (Medicare lists Obstetrics/Gynecology)
  • Address: 120 Ochsner Blvd, Gretna, LA 70056 · Directions
  • Phone: (504) 366‑5032
  • Medicare: Accepts Medicare assignment
  • Hospital: Ochsner Medical Center Acute
  • Group practice: Ochsner Clinic LLC
  • Medical school: Louisiana State University School Of Medicine In New Orleans · graduated 2019 (7 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Louis G. Monnig, 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 Louis G. Monnig accept Medicare assignment?
Yes. Medicare's clinician data says Louis G. Monnig 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 Louis G. Monnig see?
In 2024, CMS data shows 15 Original Medicare patients and 27 services for Louis G. Monnig. This counts Original Medicare only and measures volume, not quality.
What is Louis G. Monnig's NPI number?
1336609262. 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 Louis G. Monnig, 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 patients15
Services billed to Medicare27
Different services or procedures10
Participating Medicare providerYes
Average age of these patients59

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 pressure73%

Hospitals where Louis G. Monnig works

Medicare's Facility Affiliation Data lists Louis G. Monnig 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 Louis G. Monnig is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Louis G. Monnig as a member of this group (CMS data updated October 2, 2026).

  • Ochsner Clinic LLC2,864 clinicians in the group

Specialties

Find other Obstetrics/Gynecology doctors in Louisiana →

Other OB-GYNs in Gretna

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

All OB-GYNs in Gretna →

Other clinicians in Ochsner Clinic 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 year2019 (7 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1336609262
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