DR. ISOLDE FIONNA BUTLER MD, MPH
NPI 1639348915
Internal Medicine in New Orleans, LA
About Dr. Isolde Fionna Butler Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ISOLDE FIONNA BUTLER MD, MPH (NPI 1639348915) is an individual internal medicine provider in New Orleans, Louisiana, licensed in Louisiana (MD.202651) and active in the NPI registry since February 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in New Orleans.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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 (PECOS)
Dr. Isolde Fionna Butler Md, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Isolde Butler reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New Orleans, LA 70117
- Reassigned Medicare billing, Louisiana enrollment
- 69 clinicians in this Medicare group
New Orleans, LA 70112
- Reassigned Medicare billing, Louisiana enrollment
- 851 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70117 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 70117
NEW ORLEANS, LA 70117
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 Isolde Butler's NPI number?
The NPI number for Isolde Butler is 1639348915. It was assigned to this individual provider in the NPPES registry on February 21, 2008.
Where is Isolde Butler located?
Isolde Butler practices at 1631 Elysian Fields Ave, New Orleans, LA 70117. The listed phone number is (504) 821-2601.
What is Isolde Butler's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Isolde Butler enrolled in Medicare?
Yes. Isolde Butler is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Isolde Butler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Isolde Butler reassigns Medicare benefits to 2 organizations: No Aids Task Force (New Orleans, LA) and Administrators Of The Tulane Educational Fund (New Orleans, LA). Each 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 Isolde Butler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Isolde Butler accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Blue Cross and Blue Shield of Louisiana and 2 other insurers list Isolde Butler 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.
When was this NPI record last updated?
The NPPES record for Isolde Butler was last updated on April 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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. Isolde Fionna Butler, MD, MPH · NPI 1639348915
Internal Medicine physician in New Orleans, Louisiana. Individual provider, active in the CMS NPPES registry since February 21, 2008.
## Identity
- **NPI:** 1639348915 (Entity type: Individual)
- **Enumerated:** February 21, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD.202651 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1631 ELYSIAN FIELDS AVE, New Orleans, LA 70117-8208
- **Phone:** (504) 821-2601 · **Fax:** (888) 736-9806
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): No Aids Task Force (NPI 1215417563, New Orleans, LA); Administrators Of The Tulane Educational Fund (NPI 1528014164, New Orleans, LA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 17, 2026
- **Other identifiers:** Medicaid 1079685 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1639348915) · Data from the CMS NPPES public registry.