Dr. Mark Johnston Williams , MD
Anesthesiology โข Longview, TX
2901 N. 4th St.
Longview, TX 756055128
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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NPI assigned on March 1, 2006; this date does not establish years in practice.
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Published CMS data list 137 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 01926 โ Anesthesia for x-ray on artery of brain, heart, or chest: 19 service units.
- 00731 โ Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope: 17 service units.
- 00400 โ Anesthesia for other procedure on skin of arms, legs, and front body: 16 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 429 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 163 prescription fills, including refills.
- Tramadol Hcl โ 64 prescription fills, including refills.
- Morphine Sulfate Er (Morphine Sulfate) โ 37 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 10 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 60% of clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: 94. Middle half: 41 to 197.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 427 in 2020 to 137 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
2901 N. 4th St.
Longview, TX 756055128
CMS Doctors and Clinicians lists 1 group name: Northstar Anesthesia Iii Pa. 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
1986
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
318 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 โ by Provider, 2024.
Medicare-allowed amount
About $12,378 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 โ by Provider and Service, 2024.
Paid by Medicare
About $10,052 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 โ by Provider and Service, 2024.
30-day fills
464 standardized 30-day fills in 2017
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
$24,912 in 2017
The total cost of these prescriptions in 2017, 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, 2017.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $16.72 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
Years since graduation
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 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
2006
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, 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 Longview and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 60% of clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: 94. Middle half: 41 to 197.
Too few clinicians listed under Anesthesiology in Longview have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
Close to the middle for clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: $10,803. Middle half: $4,556 to $22,244.
Too few clinicians listed under Anesthesiology in Longview have Medicare Part B data for 2024 to compare.
Paid by Medicare
Close to the middle for clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: $8,494. Middle half: $3,590 to $17,455.
Too few clinicians listed under Anesthesiology in Longview have Medicare Part B data for 2024 to compare.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Williams are from 2017.
16 active clinicians are listed under Anesthesiology with a practice address in Longview, TX (4,638 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Longview
0% of these 16 clinicians have the CMS telehealth indicator.
68.8% of these 16 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 decreased 68% from 427 in 2020 to 137 in 2024.
- 2020: 427
- 2021: 968
- 2022: 557
- 2023: 500
- 2024: 137
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Medicare-allowed amount
Medicare-allowed amount decreased 68% from $39,027 in 2020 to $12,378 in 2024.
- 2020: $39,027
- 2021: $80,068
- 2022: $39,909
- 2023: $38,648
- 2024: $12,378
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Paid by Medicare
Paid by Medicare decreased 68% from $31,698 in 2020 to $10,052 in 2024.
- 2020: $31,698
- 2021: $64,492
- 2022: $32,686
- 2023: $31,697
- 2024: $10,052
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 64% from 1,180 in 2013 to 429 in 2017.
- 2013: 1,180
- 2014: 1,304
- 2015: 1,544
- 2016: 1,578
- 2017: 429
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30-day fills
30-day fills decreased 63% from 1,246 in 2013 to 464 in 2017.
- 2013: 1,246
- 2014: 1,398
- 2015: 1,624
- 2016: 1,671
- 2017: 464
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Part D drug cost
Part D drug cost decreased 57% from $57,911 in 2013 to $24,912 in 2017.
- 2013: $57,911
- 2014: $71,916
- 2015: $105,787
- 2016: $103,737
- 2017: $24,912
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $18.39 in 2019 to $16.72 in 2024.
- 2019: $18.39
- 2022: $49.95
- 2023: $43.25
- 2024: $16.72
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2017), CMS Open Payments (2024), 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 2024 (payments made January 1 โ December 31, 2024): fewer than 11 records totaling $16.72.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
XARELTO | General | $16.72 |
Source: CMS Open Payments, program year 2024, 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 2016โ2023 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, 2017โ2024; 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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01926
Anesthesia for x-ray on artery of brain, heart, or chest
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19 | 19 | $4364.63 | $114.77 |
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00731
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope
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17 | 17 | $2238.59 | $64.98 |
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00400
Anesthesia for other procedure on skin of arms, legs, and front body
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16 | 16 | $2573.75 | $77.55 |
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00910
Anesthesia for other procedure on urinary system through urethra
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15 | 15 | $2196.27 | $65.06 |
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00812
Anesthesia for exam of colon using an endoscope
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13 | 13 | $2009.85 | $50.70 |
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00811
Anesthesia for other procedure on large bowel using an endoscope
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12 | 12 | $2035.33 | $59.56 |
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01402
Anesthesia for procedure for total knee joint replacement
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12 | 12 | $4425.67 | $132.58 |
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00142
Anesthesia for lens surgery
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11 | 11 | $1988.00 | $59.44 |
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00537
Anesthesia for procedure to assess heart electrical activity
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11 | 11 | $5370.18 | $176.05 |
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00790
Anesthesia for other procedure on upper abdomen
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11 | 11 | $3717.82 | $120.07 |
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 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 163 | 4,867 | $4,207.17 | 50 |
| Tramadol Hcl | Tramadol Hcl | 64 | 1,997 | $801.87 | 21 |
| Morphine Sulfate Er | Morphine Sulfate | 37 | 1,110 | $3,018.60 | โ |
| Tizanidine Hcl | Tizanidine Hcl | 34 | 1,260 | $704.30 | 14 |
| Gabapentin | Gabapentin | 31 | 1,374 | $583.48 | 13 |
| Lyrica | Pregabalin | 26 | 960 | $13,941.61 | โ |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 20 | 540 | $480.89 | โ |
| Baclofen | Baclofen | 20 | 660 | $703.92 | โ |
| Carisoprodol | Carisoprodol | 19 | 570 | $126.66 | โ |
| Methadone Hcl | Methadone Hcl | 15 | 450 | $343.39 | โ |
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-01-31NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
NUCC Taxonomy Code: 207LP2900X
An anesthesiologist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic and/or cancer pain in both hospital and ambulatory settings. Patient care needs are also coordinated with other specialists.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20050805000755
TX
7517931207
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
Northstar Anesthesia Iii Pa
2901 4th St, Longview, TX 756055128
Phone: 9032323606
Northstar Anesthesia Iii Pa
3315 S Alameda St, Corpus Christi, TX 784111820
Phone: 2146870001
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology - Pain Medicine
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Anesthesiology (license number reported to NPPES: TX H3845)
NPI status registered as active in NPPES database
Registered at 2901 N. 4TH ST., LONGVIEW, TX 756055128 (Tel: 9032472050)
Registered at PO BOX 614, LONGVIEW, TX 756060614 (Tel: 9032472050)
Recorded as MARK WILLIAMS, M.D.
Anesthesiology (license number reported to NPPES: TX H3845)
Registered at 801 MEDICAL CIRCLE DR., SUITE E, LONGVIEW, TX 756055101 (Tel: 9032472050)
Registered at 801 MEDICAL CIRCLE DR., SUITE E, LONGVIEW, TX 756055101 (Tel: 9032472050)
NPI status registered as active in NPPES database
Registered at 703 E MARSHALL AVE, 4002, LONGVIEW, TX 756015500 (Tel: 9032472050)
Registered at 703 E MARSHALL AVE, LONGVIEW, TX 756015622 (Tel: 9032472050)
Recorded as MARK WILLIAMS, M.D.
Anesthesiology (license number reported to NPPES: TX H3845)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Anesthesiology Specialists in Longview
- Dr. Michael Roberts, MD
- Dr. Kareem Rasheed, MD
- Dr. Junyi Li, MD
- Dr. Sayojirao Kodali, MD
- Dr. Matthew Hermansen, DO, PharmD
- Dr. Jeremy Schirmer, MD
Mailing Address
Po Box 614
Longview, TX 756060614
Phone: 9032472050