ALEXANDER PYRONNEAU MD/PHD
NPI 1326788480
Internal Medicine in Charleston, SC
About Alexander Pyronneau Md/phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER PYRONNEAU MD/PHD (NPI 1326788480) is an individual internal medicine provider in Charleston, South Carolina, licensed in South Carolina (95974) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Bon Secours-st Francis Xavier Hospital, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (2022).
NPPES Registry Identity
Specialties & Licenses
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
Alexander Pyronneau Md/phd 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 Alexander Pyronneau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Charleston, SC 29401
- Reassigned Medicare billing, South Carolina enrollment
- 281 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Bon Secours-St Francis Xavier Hospital
Acute Care Hospitals · Charleston, SCRoper Hospital
Acute Care Hospitals · Charleston, SCMount Pleasant Hospital
Acute Care Hospitals · Mount Pleasant, SCRoper St Francis Hospital-Berkeley Inc
Acute Care Hospitals · Summerville, SCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29401 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.
CHARLESTON, SC 29401
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 Alexander Pyronneau's NPI number?
The NPI number for Alexander Pyronneau is 1326788480. It was assigned to this individual provider in the NPPES registry on March 29, 2022.
Where is Alexander Pyronneau located?
Alexander Pyronneau practices at 316 Calhoun St, Charleston, SC 29401. The listed phone number is (843) 724-2000.
What is Alexander Pyronneau's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Alexander Pyronneau enrolled in Medicare?
Yes. Alexander Pyronneau 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 Alexander Pyronneau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Pyronneau reassigns Medicare benefits to 24 On Physicians Of Sc, LLC (Charleston, SC). 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 Alexander Pyronneau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alexander Pyronneau affiliated with any hospitals?
According to CMS data, Alexander Pyronneau is affiliated with Bon Secours-St Francis Xavier Hospital, Roper Hospital, Mount Pleasant Hospital and Roper St Francis Hospital-Berkeley Inc.
When was this NPI record last updated?
The NPPES record for Alexander Pyronneau was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Alexander Pyronneau, MD/PHD · NPI 1326788480
Internal Medicine physician in Charleston, South Carolina. Individual provider, active in the CMS NPPES registry since March 29, 2022.
## Identity
- **NPI:** 1326788480 (Entity type: Individual)
- **Enumerated:** March 29, 2022
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 95974 (South Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 316 CALHOUN ST, Charleston, SC 29401-1113
- **Phone:** (843) 724-2000
## 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:** 24 On Physicians Of Sc, LLC (NPI 1144877655, Charleston, SC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 2022
## Record status
- **NPPES last updated:** November 14, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1326788480) · Data from the CMS NPPES public registry.