Dr Dennis A Tweedy, MD - Medicare Hematology/oncology in Austin, TX

Dr Dennis A Tweedy, MD is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in Austin, Texas. He went to University Of Virginia School Of Medicine and graduated in 1979 and has 45 years of diverse experience with area of expertise as Hematology/oncology. He is a member of the group practice Texas Oncology Pa and his current practice location is 4101 James Casey St, Suite 250, Austin, Texas. You can reach out to his office (for appointments etc.) via phone at (512) 419-9733.

Dr Dennis A Tweedy is licensed to practice in Texas (license number H7840) 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 1205874948.

Contact Information

Dr Dennis A Tweedy, MD
4101 James Casey St, Suite 250,
Austin, TX 78745-1110
(512) 419-9733
(512) 440-1747

Map and Direction




Physician's Profile

Full NameDr Dennis A Tweedy
GenderMale
SpecialityHematology/oncology
Experience45 Years
Location4101 James Casey St, Austin, 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 Dennis A Tweedy attended and graduated from University Of Virginia School Of Medicine in 1979
  NPI Data:
  • NPI Number: 1205874948
  • Provider Enumeration Date: 06/03/2006
  • Last Update Date: 05/10/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 5395731616
  • Enrollment ID: I20040422000888

Medical Identifiers

Medical identifiers for Dr Dennis A Tweedy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1205874948NPI-NPPES
132779309MedicaidTX
8BP363OtherTXBCBS OF TX
P00691573OtherTXRAILROAD MEDICARE
132779302MedicaidTX
132779310MedicaidTX
0811853-01MedicaidTX
830004370OtherTXRAILROAD MEDICARE NUMBER

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology H7840 (Texas)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Texas Oncology Pa5395658934855

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 Dennis A Tweedy allows following entities to bill medicare on his behalf.
Entity NameTexas Oncology Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811944101
PECOS PAC ID: 5395658934
Enrollment ID: O20031124000323

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 Dennis A Tweedy 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 Dennis A Tweedy, MD
Po Box 911230,
Dallas, TX 75391-1230

Ph: (972) 997-8000
Dr Dennis A Tweedy, MD
4101 James Casey St, Suite 250,
Austin, TX 78745-1110

Ph: (512) 419-9733

Reviews and Comments


Internal Medicine Doctors in Austin, TX

Dr. Tatiana B. Jacobson, M.D.
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Preeti Venkatraman, M.B.B.S.
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Dr. Joshua Lane Davis, D.O.
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Dr. Analicia Alvarado, MD
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Phone: 512-324-7000    
Dr. Grace Marie Grant-jennings, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 7000 North Mopac, Suite # 420, Austin, TX 78731
Phone: 512-482-0045    Fax: 512-476-9892
Dr. Debra Ann Patt, MD, MPH
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 6204 Balcones Dr, Austin, TX 78731
Phone: 512-427-9400    Fax: 512-342-2723

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).

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