Clarence E. Williams, MD
Family Medicine Physician · Leander, TX
Clarence E. Williams, MD is a family medicine physician with a practice address in Leander, Texas, and NPI 1154514842, issued on Aug 25, 2007. Check the license (Texas M5977, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Clarence E. Williams
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- M5977 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1007 S Highway 183, Leander, TX 78641
- Phone
- (512) 260-4900
- Enumerated
- Aug 25, 2007
- Record last updated
- Jan 25, 2022
- Fax
- (512) 260-4910
- Medicare enrollment
- Enrolled (PECOS I20071107000294); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 1007 S Highway 183
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christina ButigianPhysician Assistant1659916914
- Matthew Chandler, DPTPhysical Therapist1811661952
- Mariam Dhanani, PA-CPhysician Assistant1407196173
- Alison Granato, M.D.Family Medicine Physician1861710063
- Patricia Montemayor, MDObstetrics & Gynecology Physician1255332037
Verify Clarence E. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M5977Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average family medicine physician in 2024
2,486 Medicare Part D claims for 298 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Atorvastatin Calcium173 claims
- Amlodipine Besylate112 claims
- Lisinopril103 claims
- Gabapentin91 claims
- Levothyroxine Sodium86 claims
- Losartan Potassium73 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: $251.82
3 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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
- Scott And White ClinicLeander, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clarence E. Williams among 11,119 family medicine physician records in Texas
Clarence E. Williams, MD is one of 11,119 family medicine physician records with a practice address in Texas. 82% 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 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2004 · median 2004 among the 7,095 with a school on file
- Record last updated2022 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 family medicine physician records list a practice address in Leander
They are 10 of the 558 NPPES records with a practice address in Leander, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Leander → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rosie Augustin-Wheeler, M.D.Leander, TX 786411396777355
- Subha Chikkala, M.D.Leander, TX 786411245505254
- Luis Egelsee, MDLeander, TX 786411407969140
- Alison Granato, M.D.Leander, TX 786411861710063
- Sudhakar Konda, M.D.Leander, TX 786411376737346
- Amanda Lequire, DOLeander, TX 786411104287887
- Ronald Mansolo, MDLeander, TX 786411871586933
- Swapna Manthena, M.D.Leander, TX 786411225365208
Common questions
What is Clarence E. Williams, MD's NPI number?
Clarence E. Williams, MD's National Provider Identifier (NPI) is 1154514842, issued on Aug 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Clarence E. Williams, MD located?
The NPPES record lists a practice address at 1007 S Highway 183, Leander, TX, 78641. Phone: (512) 260-4900. Providers update this record themselves, so call before visiting.
How can I verify Clarence E. Williams, MD's license?
NPPES lists Texas license number M5977, 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 Clarence E. Williams, MD prescribe under Medicare Part D?
In 2024, Clarence E. Williams, MD had 2,486 Medicare Part D claims for 298 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.