Lillian E Williams , PA-C
Physician Assistant • Mcallen, TX
2101 S Cynthia St
Mcallen, TX 78503
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Lillian Williams is listed in NPPES under Physician Assistant.
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NPI assigned on July 23, 2007; this date does not establish years in practice.
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Published CMS data list 573 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 — Established patient outpatient office visit: 189 service units.
- 99203 — New patient outpatient office visit: 85 service units.
- 69210 — Removal of impacted ear wax: 70 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 13 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,343 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Azelastine Hcl — 355 prescription fills, including refills.
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) — 275 prescription fills, including refills.
- Cefdinir — 185 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 12 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Mcallen, TX (2024, 47 clinicians with data). Median for this group: 349. Middle half: 101 to 799.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: 211. Middle half: 76 to 593.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 33 in 2020 to 573 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
2101 S Cynthia St
Mcallen, TX 78503
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Edinburg, TX; Harlingen, TX. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Renaissance Medical Foundation. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2017
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
249 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $40,482 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $28,892 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
1,525 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$23,388 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $2,153.90 across 43 records.
By nature of payment
- Food and Beverage: $1,642.76 across 40 records.
- Travel and Lodging: $455.13 across 2 records.
- Education: $56.01 across 1 record.
Reporting-company totals (3 largest of 9)
- Medtronic, Inc.: $1,017.37 across 20 records.
- Optinose US, Inc.: $427.03 across 10 records.
- Inspire Medical Systems, Inc.: $209.28 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Lillian Williams has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Lillian Williams as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Mcallen and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Mcallen, TX (2024, 47 clinicians with data). Median for this group: 349. Middle half: 101 to 799.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: 211. Middle half: 76 to 593.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Physician Assistant in Mcallen, TX (2024, 47 clinicians with data). Median for this group: $21,499. Middle half: $11,948 to $46,273.
A higher Medicare-allowed amount than 75% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: $15,434. Middle half: $6,111 to $35,691.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Physician Assistant in Mcallen, TX (2024, 47 clinicians with data). Median for this group: $16,957. Middle half: $8,257 to $35,941.
A higher Medicare payment amount than 75% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: $11,276. Middle half: $4,395 to $26,238.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Physician Assistant in Mcallen, TX (2024, 70 clinicians with data). Median for this group: 876. Middle half: 126 to 2,175.
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: 261. Middle half: 73 to 938.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Physician Assistant in Mcallen, TX (2024, 70 clinicians with data). Median for this group: $61,865. Middle half: $4,664 to $358,531.
Close to the middle for clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: $7,999. Middle half: $749 to $103,240.
144 active clinicians are listed under Physician Assistant with a practice address in Mcallen, TX (11,008 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Mcallen
6.2% of these 144 clinicians have the CMS telehealth indicator.
45.8% of these 144 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 1636% from 33 in 2020 to 573 in 2024.
- 2020: 33
- 2021: 163
- 2022: 523
- 2023: 542
- 2024: 573
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Medicare-allowed amount
Medicare-allowed amount increased 1646% from $2,319 in 2020 to $40,482 in 2024.
- 2020: $2,319
- 2021: $11,261
- 2022: $34,803
- 2023: $35,496
- 2024: $40,482
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Paid by Medicare
Paid by Medicare increased 2000% from $1,376 in 2020 to $28,892 in 2024.
- 2020: $1,376
- 2021: $8,867
- 2022: $25,098
- 2023: $23,313
- 2024: $28,892
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 205% from 440 in 2019 to 1,343 in 2024.
- 2019: 440
- 2021: 26
- 2022: 43
- 2023: 769
- 2024: 1,343
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30-day fills
30-day fills increased 61% from 947 in 2019 to 1,525 in 2024.
- 2019: 947
- 2021: 34
- 2022: 46
- 2023: 851
- 2024: 1,525
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Part D drug cost
Part D drug cost decreased 72% from $82,710 in 2019 to $23,388 in 2024.
- 2019: $82,710
- 2021: $769
- 2022: $1,184
- 2023: $20,871
- 2024: $23,388
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 13% from $2,484.02 in 2021 to $2,153.90 in 2025.
- 2021: $2,484.02
- 2022: $3,259.97
- 2023: $5,599.87
- 2024: $1,735.73
- 2025: $2,153.90
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 43 records totaling $2,153.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Travel and Lodging
In-kind items and services
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PROPEL | General | $445.13 |
| Inspire Medical Systems, Inc. |
Food and Beverage
In-kind items and services
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INSPIRE | General | $137.04 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
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Xhance | General | $135.95 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
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Xhance | General | $127.75 |
| SOBI, INC |
Food and Beverage
In-kind items and services
|
Vonjo | General | $123.32 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
PROPEL | General | $107.41 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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NUVENT | General | $103.11 |
| Phadia US Inc. |
Food and Beverage
Cash or cash equivalent
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ImmunoCAP | General | $91.52 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $90.61 |
| Inspire Medical Systems, Inc. |
Food and Beverage
In-kind items and services
|
INSPIRE | General | $64.27 |
| Regeneron Pharmaceuticals, Inc. |
Education
In-kind items and services
|
DUPIXENT | General | $56.01 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
NUVENT | General | $41.67 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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PROPEL | General | $40.32 |
| Phadia US Inc. |
Food and Beverage
Cash or cash equivalent
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ImmunoCAP | General | $36.39 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
NUVENT | General | $31.54 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
PROPEL | General | $29.73 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
|
Xhance | General | $27.04 |
| ARS Pharmaceuticals Operations, Inc. |
Food and Beverage
In-kind items and services
|
NEFFY | General | $25.11 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
|
Xhance | General | $24.69 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
|
Xhance | General | $24.46 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
PROPEL | General | $23.98 |
| Optinose US, Inc. |
Food and Beverage
In-kind items and services
|
Xhance | General | $23.86 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
NUVENT | General | $23.31 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $22.99 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
PROPEL | General | $22.75 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
189 | 122 | $218.13 | $77.60 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
85 | 85 | $305.97 | $95.02 |
|
69210
Removal of impacted ear wax
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70 | 58 | $161.47 | $41.03 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
42 | 34 | $363.44 | $111.01 |
|
70486
Ct scan of face without contrast
|
39 | 38 | $465.43 | $96.10 |
|
92567
Test to assess middle ear function
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34 | 33 | $52.04 | $13.78 |
|
92587
Placement of ear probe for computerized measurement of sound with interpretation and report
|
27 | 27 | $153.00 | $3.58 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
23 | 23 | $160.37 | $48.67 |
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99202
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
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16 | 16 | $208.84 | $62.16 |
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31575
Diagnostic exam of voice box using a flexible endoscope
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14 | 13 | $371.09 | $110.16 |
|
92557
Comprehensive hearing and speech recognition test
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12 | 12 | $111.09 | $31.38 |
|
92504
Exam of ear using a microscope
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11 | 11 | $85.73 | $24.06 |
|
99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
11 | 11 | $472.96 | $144.93 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Azelastine Hcl | Azelastine Hcl | 355 | 12,344 | $9,842.97 | 238 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 275 | 2,775 | $2,703.22 | 269 |
| Cefdinir | Cefdinir | 185 | 1,837 | $3,147.60 | 157 |
| Fluticasone Propionate | Fluticasone Propionate | 164 | 6,150 | $1,963.43 | 116 |
| Azithromycin | Azithromycin | 84 | 529 | $517.52 | 75 |
| Ipratropium Bromide | Ipratropium Bromide | 78 | 2,411 | $1,822.59 | 41 |
| Ofloxacin | Ofloxacin | 72 | 798 | $2,245.86 | 66 |
| Omeprazole | Omeprazole | 48 | 2,009 | $552.79 | 33 |
| Montelukast Sodium | Montelukast Sodium | 26 | 1,080 | $248.76 | — |
| Methylprednisolone | Methylprednisolone | 23 | 138 | $165.21 | 23 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 19 | 310 | $90.34 | 18 |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 14 | 660 | $87.91 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-06-26NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20070823000136
TX
1759473622
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Renaissance Medical Foundation
510 Victoria Ln, Harlingen, TX 785503231
Phone: 9564284221
Renaissance Medical Foundation
5501 S Mccoll Rd, Edinburg, TX 785395503
Phone: 9563622171
Secondary Practice Locations
2601 Cornerstone Blvd
Edinburg, TX 785398479
Phone: 9566641440
510 Victoria Ln Ste 5
Harlingen, TX 785503231
Phone: 9564284221
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Otolaryngology - Plastic Surgery within the Head & Neck
Doctor of Medicine (M.D.), FACS
Nurse Practitioner - Family
Physician Assistant
Physician Assistant (Certified)
Otolaryngology - Plastic Surgery within the Head & Neck
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant
Otolaryngology - Plastic Surgery within the Head & Neck
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2101 S CYNTHIA ST, MCALLEN, TX 78503 (Tel: 9566877896)
Registered at 2101 S CYNTHIA ST, MCALLEN, TX 785031294 (Tel: 9566877896)
NPI status registered as active in NPPES database
Registered at 2601 CORNERSTONE BLVD, EDINBURG, TX 785398479 (Tel: 9566641440)
Registered at 2601 CORNERSTONE BLVD, EDINBURG, TX 785398479 (Tel: 9566641440)
Recorded as LILLIAN WILLIAMS, PA-C
Physician Assistant (license number reported to NPPES: TX 1077607)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Mcallen
- Ronald Yang, PA-C
- Megan Chavez, PA-C
- Ashley Pena, PHYSICIAN ASSISTANT
- Jacqueline Valdez, PA-C
- Shyala Bensen
- Gary Hamilton, PA
Mailing Address
2101 S Cynthia St
Mcallen, TX 785031294
Phone: 9566877896