Gregory Williams, M.D.
Psychiatry Physician · Corpus Christi, TX
Gregory Williams, M.D. is a psychiatry physician with a practice address in Corpus Christi, Texas, and NPI 1891910659, issued on Apr 16, 2007. Check the license (Texas R0812, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Williams
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- R0812 TX
Self-reported in NPPES; status is on the state search - Practice location
- 5734 Spohn Dr Ste 110, Corpus Christi, TX 78414
- Phone
- (903) 957-0082
- Enumerated
- Apr 16, 2007
- Record last updated
- May 8, 2026
- Fax
- (903) 957-0351
- Medicare enrollment
- Enrolled (PECOS I20170323002364); may accept Medicare assignment
- Medical or professional school
- Uniformed Services Uhs Fe Hebert School Of Med, 2005
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 3,318 in Texas → Look up another NPI →
Also registered at 5734 Spohn Dr Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marisol Garza, LMSWClinical Social Worker1154059012
- Ashley Harmon, MDPsychiatry Physician1528279833
- Balasundari Krishnan Venugopal Krishnaraj, MDPediatrics Physician1851944664
- Marthe Ngemhe, NPPsychiatric/Mental Health Nurse Practitioner1831871748
- Drashti PatelPsychiatric/Mental Health Nurse Practitioner1982562807
- Pauravi Rana, M.D.Psychiatry Physician1801010194
Verify Gregory Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R0812Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average psychiatry physician in 2024
236 Medicare Part D claims for 50 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Dextroamphetamine-Amphet Er61 claims
- Dextroamphetamine-Amphetamine40 claims
- Duloxetine Hcl17 claims
- Sertraline Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $24.52
1 payment: food and beverage; the largest payer was Iti, Inc. (d/b/a Intra-Cellular Therapies, Inc.). The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dfw Physicians Medical Associates LLCSherman, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Williams among 3,318 psychiatry physician records in Texas
Gregory Williams, M.D. is one of 3,318 psychiatry physician records with a practice address in Texas. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 51% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2005 · median 2006 among the 1,481 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Texas
There are 3,318 psychiatry physician records in Texas.
All 3,318 in Texas → Every provider in Corpus Christi → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jack Chelebian, M.D.Corpus Christi, TX 784141295763399
- Ashley Harmon, MDCorpus Christi, TX 784141528279833
- John Lusins, M.D.Corpus Christi, TX 784141689846701
- Pauravi Rana, M.D.Corpus Christi, TX 784141801010194
- Megan Talley, M.D.Corpus Christi, TX 784141578974614
- Raul Capitaine, MDCorpus Christi, TX 784131568457315
- Jose Pagan, MDCorpus Christi, TX 784131578545901
- Ernesto Guido, M.D.Corpus Christi, TX 784121619958204
Common questions
What is Gregory Williams, M.D.'s NPI number?
Gregory Williams, M.D.'s National Provider Identifier (NPI) is 1891910659, issued on Apr 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Williams, M.D. located?
The NPPES record lists a practice address at 5734 Spohn Dr Ste 110, Corpus Christi, TX, 78414. Phone: (903) 957-0082. Providers update this record themselves, so call before visiting.
How can I verify Gregory Williams, M.D.'s license?
NPPES lists Texas license number R0812, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Williams, M.D. prescribe under Medicare Part D?
In 2024, Gregory Williams, M.D. had 236 Medicare Part D claims for 50 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.