Dr William Cannon Lewis, MD - Medicare Colorectal Surgery (proctology) in San Antonio, TX

  1. Home
Dr William Cannon Lewis, MD is a medicare enrolled "Colon & Rectal Surgery" physician in San Antonio, Texas. He went to Baylor College Of Medicine and graduated in 1994 and has 30 years of diverse experience with area of expertise as Colorectal Surgery (proctology). He is a member of the group practice South Texas Oncology And Hematology, Pllc and his current practice location is 18707 Hardy Oak Blvd Ste 210, San Antonio, Texas. You can reach out to his office (for appointments etc.) via phone at (210) 593-2500.

Dr William Cannon Lewis is licensed to practice in Texas (license number K8936) 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 1437237369.

Contact Information

Dr William Cannon Lewis, MD
18707 Hardy Oak Blvd Ste 210,
San Antonio, TX 78258-4803
(210) 593-2500
(210) 593-2501

Map and Direction




Physician's Profile

Full NameDr William Cannon Lewis
GenderMale
SpecialityColorectal Surgery (proctology)
Experience30 Years
Location18707 Hardy Oak Blvd Ste 210, San Antonio, Texas
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 Cannon Lewis attended and graduated from Baylor College Of Medicine in 1994
  NPI Data:
  • NPI Number: 1437237369
  • Provider Enumeration Date: 11/01/2006
  • Last Update Date: 07/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 1557518842
  • Enrollment ID: I20120821000741

Medical Identifiers

Medical identifiers for Dr William Cannon Lewis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437237369NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208600000XSurgery K8936 (Texas)Secondary
208C00000XColon & Rectal Surgery K8936 (Texas)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Methodist Hospital Stone OakSan antonio, TXHospital
Baptist Medical CenterSan antonio, TXHospital

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 Cannon Lewis allows following entities to bill medicare on his behalf.
Entity NameSouth Texas Oncology And Hematology, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770664542
PECOS PAC ID: 4486618022
Enrollment ID: O20041115000331
Entity NameBrazos Valley Colorectal Surgery Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538937131
PECOS PAC ID: 4688027873
Enrollment ID: O20240124000827

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 Cannon Lewis 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 Cannon Lewis, MD
18707 Hardy Oak Blvd Ste 210,
San Antonio, TX 78258-4803

Ph: (210) 593-2500		Dr William Cannon Lewis, MD
18707 Hardy Oak Blvd Ste 210,
San Antonio, TX 78258-4803

Ph: (210) 593-2500

Reviews and Comments



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.