Dr. William J Knox , DO
Anesthesiology • Rolla, MO
1000 W 10th St
Rolla, MO 654012905
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 January 18, 2007; this date does not establish years in practice.
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Published CMS data list 231 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:
- 64483 — Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level: 46 service units.
- 64636 — Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint: 41 service units.
- 27096 — Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance: 38 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 7 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,307 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:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 385 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) — 295 prescription fills, including refills.
- Diazepam — 141 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 14 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Missouri (2024, 586 clinicians with data). Median for this group: 90. Middle half: 38 to 202.
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 398 in 2020 to 231 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1000 W 10th St
Rolla, MO 654012905
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Phelps County Regional Medical Center. 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
Kansas City Medical College
2004
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
85 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 $23,383 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 $17,456 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
1,307 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
$47,345 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: $776.53 across 21 records.
By nature of payment
- Food and Beverage: $776.53 across 21 records.
Reporting-company totals (3 largest of 5)
- Foundation Fusion Solutions, LLC: $525.10 across 14 records.
- BIOTRONIK NRO, Inc.: $103.97 across 3 records.
- Abbott Laboratories: $84.26 across 1 record.
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
22 years (graduated 2004)
CMS Doctors and Clinicians data list 2004 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)
Dr. Knox 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. Knox 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 Rolla and Missouri
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Missouri (2024, 586 clinicians with data). Median for this group: 90. Middle half: 38 to 202.
Too few clinicians listed under Anesthesiology in Rolla have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Anesthesiology in Missouri (2024, 586 clinicians with data). Median for this group: $8,727. Middle half: $3,241 to $20,137.
Too few clinicians listed under Anesthesiology in Rolla have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Anesthesiology in Missouri (2024, 586 clinicians with data). Median for this group: $7,055. Middle half: $2,595 to $15,881.
Too few clinicians listed under Anesthesiology in Rolla have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Anesthesiology in Missouri (2024, 44 clinicians with data). Median for this group: 41. Middle half: 19 to 413.
Too few clinicians listed under Anesthesiology in Rolla have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Anesthesiology in Missouri (2024, 44 clinicians with data). Median for this group: $621. Middle half: $99 to $17,766.
Too few clinicians listed under Anesthesiology in Rolla have Medicare Part D data for 2024 to compare.
4 active clinicians are listed under Anesthesiology with a practice address in Rolla, MO (1,155 in Missouri).
Addresses are self-reported to NPPES and may be out of date.
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 42% from 398 in 2020 to 231 in 2024.
- 2020: 398
- 2021: 575
- 2022: 530
- 2023: 318
- 2024: 231
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Medicare-allowed amount
Medicare-allowed amount decreased 45% from $42,381 in 2020 to $23,383 in 2024.
- 2020: $42,381
- 2021: $63,695
- 2022: $53,070
- 2023: $33,663
- 2024: $23,383
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Paid by Medicare
Paid by Medicare decreased 46% from $32,255 in 2020 to $17,456 in 2024.
- 2020: $32,255
- 2021: $50,209
- 2022: $40,144
- 2023: $24,279
- 2024: $17,456
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 27% from 1,033 in 2020 to 1,307 in 2024.
- 2020: 1,033
- 2021: 1,038
- 2022: 1,045
- 2023: 1,148
- 2024: 1,307
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30-day fills
30-day fills increased 27% from 1,033 in 2020 to 1,307 in 2024.
- 2020: 1,033
- 2021: 1,042
- 2022: 1,045
- 2023: 1,148
- 2024: 1,307
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Part D drug cost
Part D drug cost varied from year to year: $45,325 in 2020 and $47,345 in 2024.
- 2020: $45,325
- 2021: $43,371
- 2022: $32,782
- 2023: $47,656
- 2024: $47,345
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $145.60 in 2021 to $776.53 in 2025.
- 2021: $145.60
- 2022: $182.68
- 2023: $262.71
- 2024: $252.68
- 2025: $776.53
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): 21 records totaling $776.53.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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ETERNA | General | $84.26 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $64.21 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $63.75 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $60.30 |
| BIOTRONIK NRO, Inc. |
Food and Beverage
In-kind items and services
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Prospera | General | $58.83 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $54.01 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $52.14 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $50.24 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $43.06 |
| BIOTRONIK NRO, Inc. |
Food and Beverage
In-kind items and services
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Prospera | General | $28.49 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $26.81 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $25.32 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $24.40 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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KYPHON EXPRESS II KYPHOPAK TRAY | General | $23.37 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $21.46 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $20.87 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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KYPHON EXPRESS II KYPHOPAK TRAY | General | $20.10 |
| Avanos Medical |
Food and Beverage
In-kind items and services
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ON-Q PUMP AND ACCESSORIES | General | $19.73 |
| BIOTRONIK NRO, Inc. |
Food and Beverage
In-kind items and services
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Prospera | General | $16.65 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $9.35 |
| Foundation Fusion Solutions, LLC |
Food and Beverage
Cash or cash equivalent
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— | General | $9.18 |
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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64483
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level
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46 | 37 | $1584.37 | $130.83 |
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64636
Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint
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41 | 16 | $639.49 | $56.36 |
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27096
Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance
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38 | 29 | $2597.09 | $104.90 |
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64493
Injection of lower or sacral spine facet joint using imaging guidance, single level
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37 | 30 | $789.81 | $121.61 |
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64494
Injection of lower or sacral spine facet joint using imaging guidance, second level
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36 | 29 | $384.26 | $66.44 |
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64635
Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint
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18 | 17 | $1115.03 | $191.98 |
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64484
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level
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15 | 15 | $462.87 | $48.07 |
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 385 | 10,031 | $9,609.89 | 65 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 295 | 7,975 | $9,388.25 | 39 |
| Diazepam | Diazepam | 141 | 141 | $140.55 | 71 |
| Morphine Sulfate Er | Morphine Sulfate | 100 | 2,764 | $2,264.15 | 11 |
| Tramadol Hcl | Tramadol Hcl | 86 | 2,317 | $858.73 | 16 |
| Pregabalin | Pregabalin | 85 | 2,550 | $4,151.45 | 17 |
| Oxycodone Hcl | Oxycodone Hcl | 78 | 2,135 | $1,415.78 | — |
| Tramadol Hcl Er | Tramadol Hcl | 39 | 1,050 | $1,962.47 | — |
| Hysingla Er | Hydrocodone Bitartrate | 23 | 623 | $11,127.45 | — |
| Morphine Sulfate | Morphine Sulfate | 22 | 616 | $457.31 | — |
| Lidocaine-Prilocaine | Lidocaine/Prilocaine | 18 | 316 | $248.71 | 13 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 13 | 390 | $254.31 | — |
| Fentanyl | Fentanyl | 11 | 330 | $1,682.14 | — |
| Xtampza Er | Oxycodone Myristate | 11 | 302 | $3,784.20 | — |
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
NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CRITICAL CARE (INTENSIVISTS)
I20070323000166
MO
0345344826
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
Phelps County Regional Medical Center
1000 W 10th St, Rolla, MO 654012905
Phone: 5734588899
Phelps County Regional Medical Center
1000 W 10th St, Rolla, MO 654012905
Phone: 5734588899
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Nurse Anesthetist, Certified Registered
Career & Practice History
NPI enumerated January 18, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Anesthesiology Specialists in Rolla
Healthcare providers in RollaMailing Address
1000 W 10th St
Rolla, MO 654012905
Phone: 5734587879