William S. Lim, M.D.
Ophthalmology Physician · El Paso, TX
William S. Lim, M.D. is an ophthalmology physician with a practice address in El Paso, Texas, and NPI 1023107380, issued on Oct 12, 2006. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William S. Lim
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A99969 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5005 N Piedras St, El Paso, TX 79920
- Phone
- (915) 569-4432
- Enumerated
- Oct 12, 2006
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (915) 569-1233
- Medicare enrollment
- Enrolled (PECOS I20080428000415); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,514 in Texas → Look up another NPI →
Also registered at 5005 N Piedras St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lum Achu, PHARM. DPharmacist1558849638
- Anna Alevato, SOCIAL WORKERSocial Worker1932432473
- Deborah Allen, RDH, BSDental Hygienist1154770899
- Luz Allen-Clapp, MDPediatrics Physician1235390378
- Samuel Almquist, MDDermatology Physician1427257070
- Obinna Alu, PHARMDPharmacist1043628472
Verify William S. Lim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average ophthalmology physician in 2024
2,157 Medicare Part D claims for 551 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Latanoprost562 claims
- Dorzolamide-Timolol425 claims
- Prednisolone Acetate339 claims
- Ofloxacin247 claims
- Brimonidine Tartrate216 claims
- Timolol Maleate142 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: $121.42
1 payment: food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William S. Lim among 1,514 ophthalmology physician records in Texas
William S. Lim, M.D. is one of 1,514 ophthalmology physician records with a practice address in Texas. 81% 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 22% of them.
- NPI issued2006 · 22% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1999 · median 2003 among the 1,052 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Texas
There are 1,514 ophthalmology physician records in Texas.
All 1,514 in Texas → Every provider in El Paso → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Noah Kim, D.O.El Paso, TX 799201700170784
- Mark Gallardo, M.D.El Paso, TX 799221659302099
- Sapna Tibrewal, M.D.El Paso, TX 799151467847947
- Michael Foote, M.D.El Paso, TX 799121275678492
- John Hatchett, MDEl Paso, TX 799121235125824
- Robert Maddox, M.D.El Paso, TX 799121194962431
- Patricia Nelson, M.D.El Paso, TX 799111093944225
- Susan ParksEl Paso, TX 799301124031919
Common questions
What is William S. Lim, M.D.'s NPI number?
William S. Lim, M.D.'s National Provider Identifier (NPI) is 1023107380, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William S. Lim, M.D. located?
The NPPES record lists a practice address at 5005 N Piedras St, El Paso, TX, 79920. Phone: (915) 569-4432. Providers update this record themselves, so call before visiting.
How can I verify William S. Lim, M.D.'s license?
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 S. Lim, M.D. prescribe under Medicare Part D?
In 2024, William S. Lim, M.D. had 2,157 Medicare Part D claims for 551 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.