William K Barnhill , CRNA
Nurse Practitioner • Cedar Rapids, IA
3500 Edgewood Rd Ne, Apt 201
Cedar Rapids, IA 524027588
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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William Barnhill is listed in NPPES under Nurse Practitioner.
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NPI assigned on December 14, 2005; this date does not establish years in practice.
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Published CMS data list 661 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99212 — Established patient outpatient office visit: 196 service units.
- 20610 — Aspiration and/or injection of fluid from large joint: 56 service units.
- 64494 — Injection of lower or sacral spine facet joint using imaging guidance, second level: 46 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® 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 14 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 285 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:
- Gabapentin — 100 prescription fills, including refills.
- Tramadol Hcl — 45 prescription fills, including refills.
- Nortriptyline Hcl — 26 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 11 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Nurse Practitioner in Cedar Rapids, IA (2024, 44 clinicians with data). Median for this group: 283. Middle half: 77 to 1,495.
Close to the middle for Part D prescriptions among clinicians listed under Nurse Practitioner in Iowa (2024, 756 clinicians with data). Median for this group: 483. Middle half: 123 to 1,956.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 724 in 2018 to 661 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
3500 Edgewood Rd Ne
Apt 201
Cedar Rapids, IA 524027588
CMS Doctors and Clinicians lists 1 group name: Cass County Memorial Hospital. 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
1991
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $40,038 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 – by Provider and Service, 2022.
Paid by Medicare
About $31,489 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 – by Provider and Service, 2022.
30-day fills
303 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
$2,469 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: $267.10 across 4 records.
By nature of payment
- Food and Beverage: $267.10 across 4 records.
Reporting-company totals
- Globus Medical, Inc.: $166.64 across 1 record.
- Avanos Medical: $84.50 across 2 records.
- VERTEX PHARMACEUTICALS INCORPORATED: $15.96 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
35 years (graduated 1991)
CMS Doctors and Clinicians data list 1991 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
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.
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)
William Barnhill 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.
Compared with the same specialty in Cedar Rapids and Iowa
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Nurse Practitioner in Cedar Rapids, IA (2024, 44 clinicians with data). Median for this group: 283. Middle half: 77 to 1,495.
Close to the middle for clinicians listed under Nurse Practitioner in Iowa (2024, 756 clinicians with data). Median for this group: 483. Middle half: 123 to 1,956.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Nurse Practitioner in Cedar Rapids, IA (2024, 44 clinicians with data). Median for this group: $19,423. Middle half: $854 to $180,833.
A lower Part D drug cost than 65% of clinicians listed under Nurse Practitioner in Iowa (2024, 756 clinicians with data). Median for this group: $24,605. Middle half: $1,324 to $225,033.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for William Barnhill are from 2022.
70 active clinicians are listed under Nurse Practitioner with a practice address in Cedar Rapids, IA (1,294 in Iowa).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Cedar Rapids
8.6% of these 70 clinicians have the CMS telehealth indicator.
68.6% of these 70 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 varied from year to year: 724 in 2018 and 661 in 2022.
- 2018: 724
- 2019: 413
- 2020: 377
- 2021: 659
- 2022: 661
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Medicare-allowed amount
Medicare-allowed amount varied from year to year: $42,753 in 2018 and $40,038 in 2022.
- 2018: $42,753
- 2019: $22,659
- 2020: $24,903
- 2021: $40,567
- 2022: $40,038
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Paid by Medicare
Paid by Medicare varied from year to year: $33,163 in 2018 and $31,489 in 2022.
- 2018: $33,163
- 2019: $17,307
- 2020: $19,753
- 2021: $31,482
- 2022: $31,489
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 58% from 685 in 2020 to 285 in 2024.
- 2020: 685
- 2021: 817
- 2022: 936
- 2023: 412
- 2024: 285
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30-day fills
30-day fills decreased 61% from 772 in 2020 to 303 in 2024.
- 2020: 772
- 2021: 899
- 2022: 1,049
- 2023: 466
- 2024: 303
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Part D drug cost
Part D drug cost decreased 93% from $37,465 in 2020 to $2,469 in 2024.
- 2020: $37,465
- 2021: $54,497
- 2022: $92,900
- 2023: $13,991
- 2024: $2,469
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $112.29 in 2021 to $267.10 in 2025.
- 2021: $112.29
- 2022: $194.48
- 2023: $576.40
- 2024: $365.06
- 2025: $267.10
Sources: CMS Medicare Physician & Other Practitioners (2022), 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): fewer than 11 records totaling $267.10.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Globus Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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Senza | General | $166.64 |
| Avanos Medical |
Food and Beverage
In-kind items and services
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GENERATOR | General | $58.02 |
| Avanos Medical |
Food and Beverage
In-kind items and services
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GENERATOR | General | $26.48 |
| VERTEX PHARMACEUTICALS INCORPORATED |
Food and Beverage
In-kind items and services
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JOURNAVX | General | $15.96 |
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 2016–2021 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, 2017–2022; 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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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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196 | 98 | $48.23 | $34.01 |
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20610
Aspiration and/or injection of fluid from large joint
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56 | 40 | $166.48 | $38.50 |
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64494
Injection of lower or sacral spine facet joint using imaging guidance, second level
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46 | 29 | $252.07 | $49.11 |
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64493
Injection of lower or sacral spine facet joint using imaging guidance, single level
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45 | 29 | $577.33 | $98.12 |
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64635
Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint
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43 | 33 | $731.65 | $183.91 |
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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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43 | 33 | $337.67 | $56.23 |
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77002
Fluoroscopic guidance for needle placement
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40 | 31 | $179.35 | $25.91 |
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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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35 | 28 | $453.63 | $79.77 |
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99441
Telephone medical discussion with physician, 5-10 minutes
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35 | 22 | $30.14 | $29.85 |
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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
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33 | 32 | $88.09 | $63.18 |
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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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26 | 23 | $504.50 | $106.23 |
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62323
Injection of substance into lower spine canal using imaging guidance
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23 | 22 | $551.00 | $92.85 |
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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
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23 | 23 | $124.00 | $78.22 |
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20552
Injection of trigger points, 1-2 muscles
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17 | 15 | $165.00 | $33.00 |
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Gabapentin | Gabapentin | 100 | 3,272 | $971.85 | 16 |
| Tramadol Hcl | Tramadol Hcl | 45 | 1,136 | $202.39 | 11 |
| Nortriptyline Hcl | Nortriptyline Hcl | 26 | 780 | $73.17 | — |
| Tizanidine Hcl | Tizanidine Hcl | 21 | 630 | $212.89 | — |
| Celecoxib | Celecoxib | 16 | 480 | $166.94 | — |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 15 | 343 | $403.89 | — |
| Methadone Hcl | Methadone Hcl | 15 | 250 | $221.95 | — |
| Ibu | Ibuprofen | 13 | 390 | $66.30 | — |
| Naproxen | Naproxen | 12 | 330 | $70.91 | — |
| Meloxicam | Meloxicam | 11 | 600 | $20.83 | — |
| Topiramate | Topiramate | 11 | 330 | $57.83 | — |
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: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
NUCC Taxonomy Code: 367500000X
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
I20190916001428
WI
9436041068
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
Cass County Memorial Hospital
1501 E 10th St, Atlantic, IA 500221936
Phone: 7122433250
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 3500 EDGEWOOD RD NE, APT 201, CEDAR RAPIDS, IA 524027588 (Tel: 3195401460)
Registered at 3500 EDGEWOOD RD NE, APT 201, CEDAR RAPIDS, IA 524027588 (Tel: 3195401460)
Recorded as WILLIAM BARNHILL, CRNA
Nurse Practitioner (license number reported to NPPES: IA 119257)
Nurse Anesthetist, Certified Registered (license number reported to NPPES: IA D119257)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Cedar Rapids
- Jerud Cozine, NP
- Margaret Stracuzzi, ARNP
- Megan Gilmere, ACNPC-AG
- Amie Hass, ARNP
- Sarah Norris, ARNP
- Heather Mactaggart, ARNP
Mailing Address
3500 Edgewood Rd Ne, Apt 201
Cedar Rapids, IA 524027588
Phone: 3195401460