Dr. Sheryl Louise Williams , MD
Hospitalist โข Amarillo, TX
1600 Wallace Blvd
Amarillo, TX 791061799
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
NPI assigned on October 13, 2005; this date does not establish years in practice.
-
Published CMS data list 197 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Published rows only; this is not a quality measure.
-
Published Part B service records, 2022:
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 109 service units.
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 42 service units.
- 99223 โ Initial hospital care with moderate level of medical decision making: 28 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See all 4 records in the table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 13 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2021. Published rows only; this is not a quality measure.
-
Published Part D records, 2021:
- Furosemide โ 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
-
Medicare Part B services went from 577 in 2018 to 197 in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2018โ2022.
Practice Location & Contact Primary Location
1600 Wallace Blvd
Amarillo, TX 791061799
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Hospitalist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $18,946 in 2022
The total amount Medicare approved for these services in 2022. 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 โ by Provider and Service, 2022.
Paid by Medicare
About $14,595 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, 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 โ by Provider and Service, 2022.
30-day fills
13 standardized 30-day fills in 2021
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
$74 in 2021
The total cost of these prescriptions in 2021, 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 โ by Provider and Drug, 2021.
Open Payments general payments, program year 2025
All general payments: $112.48 across 4 records.
By nature of payment
- Food and Beverage: $112.48 across 4 records.
Reporting-company totals
- ZOLL Services LLC (A/K/A ZOLL LifeCor Corp): $112.48 across 4 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).
NPI first issued
2005
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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, โDoes your provider accept Medicare as full payment?โ
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)
Dr. 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 Dr. 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 Amarillo and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Williams are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Williams are from 2021.
35 active clinicians are listed under Hospitalist with a practice address in Amarillo, TX (1,588 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Amarillo
0% of these 35 clinicians have the CMS telehealth indicator.
91.4% of these 35 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.
-
Medicare Part B services
Medicare Part B services decreased 66% from 577 in 2018 to 197 in 2022.
- 2018: 577
- 2019: 311
- 2020: 296
- 2021: 144
- 2022: 197
-
Medicare-allowed amount
Medicare-allowed amount decreased 80% from $93,476 in 2018 to $18,946 in 2022.
- 2018: $93,476
- 2019: $52,943
- 2020: $35,840
- 2021: $15,615
- 2022: $18,946
-
Paid by Medicare
Paid by Medicare decreased 79% from $68,987 in 2018 to $14,595 in 2022.
- 2018: $68,987
- 2019: $39,336
- 2020: $29,195
- 2021: $11,907
- 2022: $14,595
-
Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2013 to 13 in 2021.
- 2013: 11
- 2021: 13
-
30-day fills
30-day fills went from 11 in 2013 to 13 in 2021.
- 2013: 11
- 2021: 13
-
Part D drug cost
Part D drug cost went from $120 in 2013 to $74 in 2021.
- 2013: $120
- 2021: $74
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $190.37 in 2021 to $112.48 in 2025.
- 2021: $190.37
- 2022: $354.67
- 2023: $189.14
- 2024: $114.58
- 2025: $112.48
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2021), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท 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 โ December 31, 2025): fewer than 11 records totaling $112.48.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $31.33 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $31.21 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $26.28 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $23.66 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2021 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 โ by Provider and Service data, 2017โ2022; 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 |
|---|---|---|---|---|
|
99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
|
109 | 26 | $160.00 | $69.31 |
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
42 | 17 | $230.00 | $99.85 |
|
99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
|
28 | 28 | $440.00 | $191.33 |
|
99239
Hospital discharge day management, more than 30 minutes
|
18 | 16 | $350.11 | $102.21 |
Source: CMS Part B by Provider and Service, 2022; 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 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Furosemide | Furosemide | 13 | 374 | $73.83 | โ |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208M00000X
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - HOSPITALIST
I20041202000099
TX
3274599220
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Hospitalist
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Family Nurse Practitioner
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at PO BOX 840026, DALLAS, TX 752840026 (Tel: 8062126965)
Registered at 1600 WALLACE BLVD, AMARILLO, TX 791061799 (Tel: 8062122129)
Recorded as SHERYL WILLIAMS, M. D.
Internal Medicine (license number reported to NPPES: TX H6709)
NPI status registered as active in NPPES database
Registered at 1600 WALLACE BLVD, AMARILLO, TX 791061799 (Tel: 8062122129)
Registered at PO BOX 2533, AMARILLO, TX 791052533 (Tel: 8062126649)
Recorded as SHERYL WILLIAMS, M. D.
Internal Medicine (license number reported to NPPES: TX H6709)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Hospitalists in Amarillo
- Dr. Thayer Ismaael, MD
- Kelsey Hernandez, AGACNP-BC
- Dr. Joshua Sorenson, MD
- Dr. Ashwin Chandra, DO
- Dr. James Martindale, MD
- Dr. Omar Mahasneh, MD
Mailing Address
Po Box 840026
Dallas, TX 752840026
Phone: 8062126965