Colville Williams
NPI 1861490005 · Nephrology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colville Williams is a Nephrology Physician provider in Houston, TX (NPI 1861490005).
Provider details
- NPI number
- 1861490005
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- J8419 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
636 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 280 | $78 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 185 | $350 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 78 | $118 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 57 | $130 |
| Hemodialysis Procedure With Physician Evaluation90935 | 19 | $70 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 104 | 30 |
| Nifedipinebrand: Nifedipine Er | 40 | 11 |
| Amlodipine Besylate | 39 | 15 |
| Hydralazine Hcl | 38 | 11 |
| Losartan Potassium | 37 | 12 |
| Gabapentin | 35 | 13 |
| Sevelamer Carbonate | 35 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$108 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 13219 Dotson Rd Ste 200Houston, TX 77070-4308Phone: (281) 571-8090Fax: (281) 571-8095
- 10425 Huffmeister Rd Ste 420Houston, TX 77065-3429Phone: (281) 571-8090Fax: (281) 571-8095
- 1331 W Grand Pkwy N Ste 320Katy, TX 77493-2711Phone: (713) 468-5440Fax: (713) 973-0778
Registry dates
- Enumerated
- 2005-07-12
- Last updated
- 2025-10-29
- Certified
- 2025-10-29
Frequently asked questions
- What is Colville Williams's NPI number?
- Colville Williams's National Provider Identifier (NPI) is 1861490005, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colville Williams's specialty?
- Colville Williams is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Colville Williams located?
- Colville Williams's practice location on file with NPPES is 915 Gessner Rd Ste 360, Houston, TX 77024-2540.
- What is Colville Williams's phone number?
- The practice phone number listed in the NPPES registry for Colville Williams is (713) 468-5440.
- Does Colville Williams accept Medicare?
- Colville Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colville Williams's NPI active?
- Yes — Colville Williams's NPI (1861490005) is active in the NPPES registry as of the last update on 2025-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.