Dr Gregory Williams, MD - Medicare Psychiatry in Corpus Christi, TX

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Dr Gregory Williams, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Corpus Christi, Texas. He went to Uniformed Services Uhs Fe Hebert School Of Med and graduated in 2005 and has 21 years of diverse experience with area of expertise as Psychiatry. He is a member of the group practice Progressive Behavioral Health, Pllc, Dfw Physicians Medical Associates Llc and his current practice location is 5734 Spohn Dr Ste 110, Corpus Christi, Texas. You can reach out to his office (for appointments etc.) via phone at (903) 957-0082.

Dr Gregory Williams is licensed to practice in Texas (license number R0812) and he also participates in the medicare program. He may accept medicare assignments (which means he may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance) and his NPI Number is 1891910659.

Contact Information

Dr Gregory Williams, MD
5734 Spohn Dr Ste 110,
Corpus Christi, TX 78414-4116
(903) 957-0082
(903) 957-0351

Map and Direction




Physician's Profile

Full NameDr Gregory Williams
GenderMale
SpecialityPsychiatry
Experience21 Years
Location5734 Spohn Dr Ste 110, Corpus Christi, Texas
Accepts Medicare AssignmentsMay be. He may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Gregory Williams attended and graduated from Uniformed Services Uhs Fe Hebert School Of Med in 2005
  NPI Data:
  • NPI Number: 1891910659
  • Provider Enumeration Date: 04/16/2007
  • Last Update Date: 05/08/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 6305121872
  • Enrollment ID: I20170323002364

Medical Identifiers

Medical identifiers for Dr Gregory Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1891910659NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry R0812 (Texas)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Progressive Behavioral Health, Pllc4486794906366
Dfw Physicians Medical Associates Llc882049300014

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 Gregory Williams allows following entities to bill medicare on his behalf.
Entity NameProgressive Behavioral Health, PLLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659567238
PECOS PAC ID: 4486794906
Enrollment ID: O20091214000763
Entity NameDfw Physicians Medical Associates LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376014076
PECOS PAC ID: 8820493000
Enrollment ID: O20210826000797

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 Gregory Williams 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 Gregory Williams, MD
425 N Highland Ave Ste 260,
Sherman, TX 75092-7377

Ph: (903) 957-0082		Dr Gregory Williams, MD
5734 Spohn Dr Ste 110,
Corpus Christi, TX 78414-4116

Ph: (903) 957-0082

Reviews and Comments


Psychiatry & Neurology Doctors in Corpus Christi, TX

Marcos J. Valdez, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 3533 S Alameda St, Corpus Christi, TX 78411
Phone: 361-694-6747    Fax: 361-808-2070
Dr. Chad Bradford, M.D.
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 10651 E St, Corpus Christi, TX 78419
Phone: 361-961-3620    
Dr. Nestor Hugo Praderio, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1315 Santa Fe St Ste 201, Corpus Christi, TX 78404
Phone: 361-887-9600    Fax: 361-883-1661
John Marcus Kirk, M.D.
Psychiatry & Neurology
Medicare: Not Enrolled in Medicare
Practice Location: 205 S Enterprize Pkwy, Corpus Christi, TX 78405
Phone: 361-939-6510    
Matthew Le, DO
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 2606 Hospital Blvd Ste B, Corpus Christi, TX 78405
Phone: 361-902-4789    
Dr. Lisa Marie Vela, MD
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1533 S Brownlee Blvd, Corpus Christi, TX 78404
Phone: 361-886-3065    Fax: 361-886-3093
Dr. Devereaux Lashonti Nollie, M.D
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 3533 S Alameda St, 2nd Floor Health Center, Suite H260, Corpus Christi, TX 78411
Phone: 361-694-1550    Fax: 361-808-2766

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.