DR. MERRILL HARPE STEWART III M.D.
NPI 1679830111
Internal Medicine - Cardiovascular Disease in New Orleans, LA
About Dr. Merrill Harpe Stewart Iii M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MERRILL HARPE STEWART III M.D. (NPI 1679830111) is an individual cardiovascular disease provider in New Orleans, Louisiana, licensed in Louisiana (MD.207586) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Ochsner Medical Center Acute, and is a graduate of University Of Alabama School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Merrill Harpe Stewart Iii M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Merrill Stewart reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Orleans, LA 70121
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 17
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ochsner Medical Center Acute
Acute Care Hospitals · New Orleans, LAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70121 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Merrill Stewart's NPI number?
The NPI number for Merrill Stewart is 1679830111. It was assigned to this individual provider in the NPPES registry on April 23, 2012.
Where is Merrill Stewart located?
Merrill Stewart practices at 1514 Jefferson Highway Ochsner Clinic Foundation - Cardiology Fellowship Progr, New Orleans, LA 70121. The listed phone number is (504) 842-0879.
What is Merrill Stewart's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Merrill Stewart enrolled in Medicare?
Yes. Merrill Stewart is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Merrill Stewart's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Merrill Stewart reassigns Medicare benefits to Ochsner Clinic LLC (New Orleans, LA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Merrill Stewart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Merrill Stewart accept?
Health plans from Blue Cross and Blue Shield of Louisiana, CHRISTUS Health Plan and HMO Louisiana list Merrill Stewart as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Merrill Stewart affiliated with any hospitals?
According to CMS data, Merrill Stewart is affiliated with Ochsner Medical Center Acute.
When was this NPI record last updated?
The NPPES record for Merrill Stewart was last updated on August 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Merrill Harpe Stewart III, M.D. · NPI 1679830111
Cardiovascular Disease physician in New Orleans, Louisiana. Individual provider, active in the CMS NPPES registry since April 23, 2012.
## Identity
- **NPI:** 1679830111 (Entity type: Individual)
- **Enumerated:** April 23, 2012
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** MD.207586 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1514 JEFFERSON HIGHWAY, OCHSNER CLINIC FOUNDATION - CARDIOLOGY FELLOWSHIP PROGR, New Orleans, LA 70121
- **Phone:** (504) 842-0879 · **Fax:** (504) 842-3278
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Ochsner Clinic LLC (NPI 1215136080, New Orleans, LA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Alabama School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** August 6, 2021
- **Other identifiers:** Medicaid 06950320 (MS)
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Source: [NPI Profile](https://npiprofile.com/npi/1679830111) · Data from the CMS NPPES public registry.