Dr William S Cantwell, MD - Medicare Critical Care (intensivists) in Alexandria, LA

Dr William S Cantwell, MD is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Alexandria, Louisiana. He went to Louisiana State University School Of Medicine In Shreveport and graduated in 2005 and has 19 years of diverse experience with area of expertise as Critical Care (intensivists). He is a member of the group practice Christus Trinity Clinic, Northeast Texas Intensivists, Pllc and his current practice location is 211 4th St, Emcare, Alexandria, Louisiana. You can reach out to his office (for appointments etc.) via phone at (727) 533-8707.

Dr William S Cantwell is licensed to practice in Louisiana (license number MD.201136) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1851592075.

Contact Information

Dr William S Cantwell, MD
211 4th St, Emcare,
Alexandria, LA 71301-8421
(727) 533-8707
(727) 507-3618

Map and Direction




Physician's Profile

Full NameDr William S Cantwell
GenderMale
SpecialityCritical Care (intensivists)
Experience19 Years
Location211 4th St, Alexandria, Louisiana
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William S Cantwell attended and graduated from Louisiana State University School Of Medicine In Shreveport in 2005
  NPI Data:
  • NPI Number: 1851592075
  • Provider Enumeration Date: 05/29/2007
  • Last Update Date: 03/26/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 4284799479
  • Enrollment ID: I20091209000404

Medical Identifiers

Medical identifiers for Dr William S Cantwell such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1851592075NPI-NPPES
208430301MedicaidTX
208430302MedicaidTX
TIN PLUS 042OtherTXTRICARE
8V3851OtherTXBCBS
181274001MedicaidAR
1092819MedicaidLA
09281MedicaidLA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine MD.201136 (Louisiana)Secondary
207RC0200XInternal Medicine - Critical Care Medicine MD.201136 (Louisiana)Primary
207RC0200XInternal Medicine - Critical Care Medicine N3533 (Texas)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Christus Mother Frances HospitalTyler, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Christus Trinity Clinic30724267411217
Northeast Texas Intensivists, Pllc509216752834

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr William S Cantwell allows following entities to bill medicare on his behalf.
Entity NameChristus Trinity Clinic
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285684225
PECOS PAC ID: 3072426741
Enrollment ID: O20031204001091
Entity NameNortheast Texas Intensivists, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1497536676
PECOS PAC ID: 5092167528
Enrollment ID: O20240119001805
Entity NameTyler Physician Services Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225898034
PECOS PAC ID: 3678912870
Enrollment ID: O20240422000594

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr William S Cantwell is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr William S Cantwell, MD
18167 Us Highway 19 N, Suite 650,
Clearwater, FL 33764-3528

Ph: (727) 533-8707
Dr William S Cantwell, MD
211 4th St, Emcare,
Alexandria, LA 71301-8421

Ph: (727) 533-8707

Reviews and Comments


Internal Medicine Doctors in Alexandria, LA

Dr. Bruce W Barton, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 201 4th St Ste 3d, Alexandria, LA 71301
Phone: 318-473-9701    Fax: 318-473-9705
Dr. Hafez Halawani, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3330 Masonic Dr, Alexandria, LA 71301
Phone: 318-448-6917    Fax: 318-448-6866
Dr. Arun K Karsan, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 201 4th St, Suite 2d, Alexandria, LA 71301
Phone: 318-442-7867    Fax: 318-442-3015
Robert J Richards, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 211 4th St Ste 3f, Alexandria, LA 71301
Phone: 318-625-4149    Fax: 877-525-2516
Dr. Kelly Ryder Letsinger, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3330 Masonic Dr, Alexandria, LA 71301
Phone: 318-320-4422    
Dr. Vikram Singh Nijjar, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2108 Texas Ave, Suite 2061, Alexandria, LA 71301
Phone: 318-448-1041    Fax: 318-448-0895
Dr. Naseem A Jaffrani, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 501 Medical Center Dr, Suite 250, Alexandria, LA 71301
Phone: 318-473-4613    Fax: 318-445-7129

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.