DR. WILLIAM S CANTWELL MD
NPI 1851592075
Internal Medicine - Critical Care Medicine in Alexandria, LA
About Dr. William S Cantwell Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM S CANTWELL MD (NPI 1851592075) is an individual critical care medicine provider in Alexandria, Louisiana, licensed in Louisiana (MD.201136) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Christus Mother Frances Hospital, and is a graduate of Louisiana State University School Of Medicine In Shreveport (2005).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 10
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. William S Cantwell Md 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 Reassignments
4Medicare enrollment records show William Cantwell reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Longview, TX 75601
- Reassigned Medicare billing, Texas enrollment
- 70 clinicians in this Medicare group
New Orleans, LA 70112
- Reassigned Medicare billing, Louisiana enrollment
- 295 clinicians in this Medicare group
Tyler, TX 75701
- Reassigned Medicare billing, Texas enrollment
- 43 clinicians in this Medicare group
Tyler, TX 75702
- Reassigned Medicare billing, Texas enrollment
- 2,745 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 3
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.
Christus Mother Frances Hospital
Acute Care Hospitals · Tyler, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 71301 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.
ALEXANDRIA, LA 71301
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 William Cantwell's NPI number?
The NPI number for William Cantwell is 1851592075. It was assigned to this individual provider in the NPPES registry on May 29, 2007.
Where is William Cantwell located?
William Cantwell practices at 211 4th St Emcare, Alexandria, LA 71301. The listed phone number is (727) 533-8707.
What is William Cantwell's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is William Cantwell enrolled in Medicare?
Yes. William Cantwell 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 organizations bill Medicare for William Cantwell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Cantwell reassigns Medicare benefits to 4 organizations: Northeast Texas Intensivists, PLLC (Longview, TX), University Medical Center Management Corporation (New Orleans, LA), Tyler Physician Services, PLLC (Tyler, TX) and Christus Trinity Clinic Texas (Tyler, TX). 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 William Cantwell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Cantwell accept?
Health plans from Blue Cross and Blue Shield of Texas and CHRISTUS Health Plan list William Cantwell 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 William Cantwell affiliated with any hospitals?
According to CMS data, William Cantwell is affiliated with Christus Mother Frances Hospital.
When was this NPI record last updated?
The NPPES record for William Cantwell was last updated on March 26, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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. William S Cantwell, MD · NPI 1851592075
Critical Care Medicine physician in Alexandria, Louisiana. Individual provider, active in the CMS NPPES registry since May 29, 2007.
## Identity
- **NPI:** 1851592075 (Entity type: Individual)
- **Enumerated:** May 29, 2007
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** MD.201136 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 211 4TH ST, EMCARE, Alexandria, LA 71301-8421
- **Phone:** (727) 533-8707 · **Fax:** (727) 507-3618
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Northeast Texas Intensivists, PLLC (NPI 1497536676, Longview, TX); University Medical Center Management Corporation (NPI 1083655567, New Orleans, LA); Tyler Physician Services, PLLC (NPI 1225898034, Tyler, TX); Christus Trinity Clinic Texas (NPI 1285684225, Tyler, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Louisiana State University School Of Medicine In Shreveport, class of 2005
## Record status
- **NPPES last updated:** March 26, 2013
- **Other identifiers:** Medicare PIN 4N573CQ62 (LA); Medicaid 1092819 (LA); Medicare OSCAR/certification 8L22503 (TX); and 7 more
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Source: [NPI Profile](https://npiprofile.com/npi/1851592075) · Data from the CMS NPPES public registry.