William M. Lewis, DO
Internal Medicine Physician · Austin, TX
William M. Lewis, DO is an internal medicine physician with a practice address in Austin, Texas, and NPI 1265401350, issued on Mar 14, 2006. Check the license (Texas L8414, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William M. Lewis
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- L8414 TX
Self-reported in NPPES; status is on the state search - Practice location
- 12221 N Mopac Expy, Austin, TX 78758
- Phone
- (512) 901-4009
- Enumerated
- Mar 14, 2006
- Record last updated
- Feb 1, 2022
- Fax
- (512) 901-3909
- Medicaid ID
- 165617501 TX
- Medicare enrollment
- Enrolled (PECOS I20040805001570); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 12221 N Mopac Expy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Juine Abraham, RN., NP-CFamily Nurse Practitioner1194095133
- Farrah Alahmady, AAAnesthesiologist Assistant1083198014
- Fernanda AlmeidaRegistered Dietitian1487009775
- Mirjana Antelj-RojasFamily Nurse Practitioner1548712946
- Pamela Ashley, MDEmergency Medicine Physician1780630889
- Antoinette Austin-Glass, MDAnesthesiology Physician1790723138
Verify William M. Lewis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L8414Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average internal medicine physician in 2024
8,569 Medicare Part D claims for 973 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 178 claims were for opioids.
Most prescribed
- Atorvastatin Calcium429 claims
- Levothyroxine Sodium394 claims
- Amlodipine Besylate282 claims
- Simvastatin231 claims
- Losartan Potassium215 claims
- Lisinopril203 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $787.37
45 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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
- The Austin Diagnostic Clinic PLLCAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William M. Lewis among 9,175 internal medicine physician records in Texas
William M. Lewis, DO is one of 9,175 internal 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2001 · median 2004 among the 6,088 with a school on file
- Record last updated2022 · 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 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
606 internal medicine physician records list a practice address in Austin
They are 606 of the 26,585 NPPES records with a practice address in Austin, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Austin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Yolanda Clay-Po, M.D.Austin, TX 787581164405833
- Charles Felger, MDAustin, TX 787581235105289
- Frederick Fung, MDAustin, TX 787581275509291
- Laura Guerrero, MDAustin, TX 787581619944725
- Malik Merchant, MDAustin, TX 787581245238534
- Meen Misra, M.D.Austin, TX 787581336134105
- Anjali Nemawarkar, MDAustin, TX 787581093779555
- Rajeev Prakash, MDAustin, TX 787581730170960
Common questions
What is William M. Lewis, DO's NPI number?
William M. Lewis, DO's National Provider Identifier (NPI) is 1265401350, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William M. Lewis, DO located?
The NPPES record lists a practice address at 12221 N Mopac Expy, Austin, TX, 78758. Phone: (512) 901-4009. Providers update this record themselves, so call before visiting.
How can I verify William M. Lewis, DO's license?
NPPES lists Texas license number L8414, 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 William M. Lewis, DO prescribe under Medicare Part D?
In 2024, William M. Lewis, DO had 8,569 Medicare Part D claims for 973 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William M. Lewis, DO's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.