Colville T. Williams
Nephrology Physician · Houston, TX
Colville T. Williams is a nephrology physician with a practice address in Houston, Texas, and NPI 1861490005, issued on Jul 12, 2005. Check the license (Texas J8419, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Colville T. Williams
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- J8419 TX
Self-reported in NPPES; status is on the state search - Practice location
- 915 Gessner RD Ste 360, Houston, TX 77024
- Phone
- (713) 468-5440
- Enumerated
- Jul 12, 2005
- Record last updated
- Oct 29, 2025
- Fax
- (713) 973-0778
- Medicare enrollment
- Enrolled (PECOS I20060301000540); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1995
- Entity
- Type 1 · individual
Also registered at 915 Gessner RD Ste 360
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adil Ali, M.D.Nephrology Physician1396062600
- Joanne Brunelle Hindlet, APRN,BCAcute Care Nurse Practitioner1265651806
- Monica Guidry, FNPFamily Nurse Practitioner1306596812
- Esther Lifafe, FNP-BCFamily Nurse Practitioner1306100433
- Masood Mahmood, M.DNephrology Physician1205218054
- Redentor Roy, M.D.Nephrology Physician1982674883
Verify Colville T. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license J8419Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average nephrology physician in 2024
805 Medicare Part D claims for 129 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Calcitriol104 claims
- Nifedipine Er40 claims
- Amlodipine Besylate39 claims
- Hydralazine Hcl38 claims
- Losartan Potassium37 claims
- Gabapentin35 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: $108.20
5 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Houston Nephrology Group, P.A.Houston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Texas
There are 1,159 nephrology physician records in Texas.
Other nephrology physician records in Texas
- Bernardino Abaya, M.D.Houston, TX1740262013
- Aisha Abbasi, MDConroe, TX1942837570
- Abdul Abdellatif, M.D.Webster, TX1164560595
- Dina Abdelwahab, MDDallas, TX1801050208
- Mohammed Abdulaziz, MDLaredo, TX1881009215
- Muhammad Abdullah, MDSan Antonio, TX1154614832
- Nashila Abdulrahim, DODallas, TX1659665180
- Mai Abouelsaad, M.D.Houston, TX1790168086
- Fadi Abouzahr, MDSan Antonio, TX1982695896
- Koshy Abraham, MDFort Worth, TX1780658559
Common questions
What is Colville T. Williams's NPI number?
Colville T. Williams's National Provider Identifier (NPI) is 1861490005, issued on Jul 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Colville T. Williams located?
The NPPES record lists a practice address at 915 Gessner RD Ste 360, Houston, TX, 77024. Phone: (713) 468-5440. Providers update this record themselves, so call before visiting.
How can I verify Colville T. Williams's license?
NPPES lists Texas license number J8419, 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 Colville T. Williams prescribe under Medicare Part D?
In 2024, Colville T. Williams had 805 Medicare Part D claims for 129 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.