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DR. WILLIAM S LIM M.D.
NPI 1023107380
Ophthalmology in El Paso, TX

Active since October 12, 2006PECOS EnrolledAccepts Medicare Assignment
5005 N PIEDRAS ST, WBAMC OPHTHALMOLOGY CLINIC, 2178, EL PASO, TX 79920(915) 569-4432(915) 569-1233 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. William S Lim M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM S LIM M.D. (NPI 1023107380) is an individual ophthalmology provider in El Paso, Texas, licensed in California (A99969) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1999).

NPPES Registry Identity

NPI1023107380
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameDR. WILLIAM S LIMCredential: M.D.
Location Address5005 N PIEDRAS ST, WBAMC OPHTHALMOLOGY CLINIC, 2178El Paso, TX 79920-5001
Mailing Address5005 N Piedras St, Wbamc Ophthalmology Clinic, 2178El Paso, TX 79920-5001 · (915) 569-4432 · Fax (915) 569-1233
Phone(915) 569-4432
Fax(915) 569-1233
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateOctober 12, 2006
Last NPPES UpdateDecember 1, 2021
NPPES CertifiedDecember 1, 2021
✔ NPI 1023107380 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · A99969
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
5005 N PIEDRAS ST, El Paso, TX 79920
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William S Lim M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5496833782
PECOS Enrollment IDI20080428000415
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Lim reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group
624 mi
Health Maintenance Organization
3527 W FLORIDA AVE
Hemet, CA 92545
  • Reassigned Medicare billing, California enrollment
  • 5,228 clinicians in this Medicare group
NPI 1013433465 (877) 608-0044

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 79920 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WILLIAM BEAUMONT ARMY MEDICAL CENTER
Clinic/Center (Military/U.S. Coast Guard Outpatient)
5005 N PIEDRAS ST, BUILDING 7777
EL PASO, TX 79920
El Paso County (915) 568-1101
JOSEPH W BLACK
Social Worker (Clinical)
5005 N PIEDRAS ST, WILLIAM BEAUMONT ARMY MEDICAL CENTER
EL PASO, TX 79920
El Paso County (915) 742-6382
GLENN BRIAN LAIRD LVN
Licensed Vocational Nurse
5005 N PIEDRAS ST
EL PASO, TX 79920
El Paso County (915) 598-0474
MR. JOSEPH R. BONGIORNO P.A.
Physician Assistant
5005 N PIEDRAS ST
EL PASO, TX 79920
El Paso County (915) 569-1386
MR. PAGE ANTHONY KARSTETER DSCPT
Physical Therapist
5005 N PIEDRAS ST
EL PASO, TX 79920
El Paso County (915) 569-1233
DR. BRIAN RANTALA PHARMD
Pharmacist
5005 N PIEDRAS ST
EL PASO, TX 79920
El Paso County (915) 742-1400
DR. PRATIK NAIK M.D.
Internal Medicine
5005 N PIEDRAS ST
EL PASO, TX 79920
El Paso County (915) 742-2180
DR. MICHAEL ANTHONY WEBER M.D.
Surgery
5005 N PIEDRAS ST, WBAMC
EL PASO, TX 79920
El Paso County (915) 569-3695

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Lim's NPI number?

The NPI number for William Lim is 1023107380. It was assigned to this individual provider in the NPPES registry on October 12, 2006.

Where is William Lim located?

William Lim practices at 5005 N Piedras St Wbamc Ophthalmology Clinic, 2178, El Paso, TX 79920. The listed phone number is (915) 569-4432.

What is William Lim's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is William Lim enrolled in Medicare?

Yes. William Lim is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Lim's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Lim reassigns Medicare benefits to Southern California Permanente Medical Group (Hemet, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Lim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Lim was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.