Tra Thi Thanh Bui , PA
Physician Assistant โข Marshfield, WI
Marshfield Clinic, 1000 N Oak Avenue
Marshfield, WI 54449
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 June 11, 2017; this date does not establish years in practice.
-
Published CMS data list 57 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
-
Published Part B service records, 2023:
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 26 service units.
- 99222 โ Initial hospital care with straightforward or low-level medical decision making: 18 service units.
- 93016 โ Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician: 13 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Pantoprazole Sodium โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. 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
-
Fewer Part D prescriptions than 95% of clinicians listed under Physician Assistant in Marshfield, WI (2024, 23 clinicians with data). Median for this group: 67. Middle half: 40 to 222.
Fewer Part D prescriptions than 95% of clinicians listed under Physician Assistant in Wisconsin (2024, 2,083 clinicians with data). Median for this group: 195. Middle half: 67 to 674.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 130 in 2019 to 57 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019โ2023.
Practice Location & Contact Primary Location
Marshfield Clinic
1000 N Oak Avenue
Marshfield, WI 54449
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 3 distinct additional practice-address records in North Platte, NE; Topeka, KS. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Mchs Hospitals Inc. 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
2015
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $3,744 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $2,831 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
14 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
$70 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $463.93 across 12 records.
By nature of payment
- Food and Beverage: $343.28 across 11 records.
- Travel and Lodging: $120.65 across 1 record.
Reporting-company totals (3 largest of 6)
- Getinge USA Sales, LLC: $283.45 across 5 records.
- ABIOMED: $58.19 across 2 records.
- Boston Scientific Corporation: $45.18 across 2 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
11 years (graduated 2015)
CMS Doctors and Clinicians data list 2015 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
2017
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)
Tra Bui 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 Tra Bui 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 Marshfield and Wisconsin
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 95% of clinicians listed under Physician Assistant in Marshfield, WI (2024, 23 clinicians with data). Median for this group: 67. Middle half: 40 to 222.
Fewer Part D prescriptions than 95% of clinicians listed under Physician Assistant in Wisconsin (2024, 2,083 clinicians with data). Median for this group: 195. Middle half: 67 to 674.
Part D drug cost
A lower Part D drug cost than 90% of clinicians listed under Physician Assistant in Marshfield, WI (2024, 23 clinicians with data). Median for this group: $603. Middle half: $221 to $8,333.
A lower Part D drug cost than 95% of clinicians listed under Physician Assistant in Wisconsin (2024, 2,083 clinicians with data). Median for this group: $2,439. Middle half: $549 to $63,260.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Tra Bui are from 2023.
56 active clinicians are listed under Physician Assistant with a practice address in Marshfield, WI (3,476 in Wisconsin).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Marshfield
5.4% of these 56 clinicians have the CMS telehealth indicator.
58.9% of these 56 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 56% from 130 in 2019 to 57 in 2023.
- 2019: 130
- 2020: 86
- 2021: 48
- 2022: 38
- 2023: 57
-
Medicare-allowed amount
Medicare-allowed amount decreased 58% from $8,933 in 2019 to $3,744 in 2023.
- 2019: $8,933
- 2020: $5,023
- 2021: $1,529
- 2022: $4,078
- 2023: $3,744
-
Paid by Medicare
Paid by Medicare decreased 59% from $6,922 in 2019 to $2,831 in 2023.
- 2019: $6,922
- 2020: $3,906
- 2021: $1,228
- 2022: $3,274
- 2023: $2,831
-
Medicare Part D prescriptions
Medicare Part D prescriptions decreased 95% from 245 in 2020 to 12 in 2024.
- 2020: 245
- 2021: 195
- 2022: 69
- 2023: 55
- 2024: 12
-
30-day fills
30-day fills decreased 95% from 296 in 2020 to 14 in 2024.
- 2020: 296
- 2021: 247
- 2022: 101
- 2023: 105
- 2024: 14
-
Part D drug cost
Part D drug cost decreased 100% from $19,434 in 2020 to $70 in 2024.
- 2020: $19,434
- 2021: $17,479
- 2022: $1,048
- 2023: $7,185
- 2024: $70
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $219.12 in 2021 to $463.93 in 2025.
- 2021: $219.12
- 2022: $60.34
- 2023: $303.76
- 2024: $248.03
- 2025: $463.93
Sources: CMS Medicare Physician & Other Practitioners (2023), 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 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): 12 records totaling $463.93.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Getinge USA Sales, LLC |
Travel and Lodging
Cash or cash equivalent
|
VASOVIEW HEMOPRO 2 | General | $120.65 |
| Getinge USA Sales, LLC |
Food and Beverage
In-kind items and services
|
VASOVIEW HEMOPRO 2 | General | $90.31 |
| Getinge USA Sales, LLC |
Food and Beverage
Cash or cash equivalent
|
VASOVIEW HEMOPRO 2 | General | $51.04 |
| ABIOMED |
Food and Beverage
In-kind items and services
|
โ | General | $34.10 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
WATCHMAN FLX | General | $30.10 |
| AtriCure, Inc. |
Food and Beverage
In-kind items and services
|
AtriCure cryoICE Cryoablation System (CRYO2) | General | $27.28 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
SIGNIA | General | $25.63 |
| Becton, Dickinson and Company |
Food and Beverage
In-kind items and services
|
PleurX | General | $24.20 |
| ABIOMED |
Food and Beverage
In-kind items and services
|
โ | General | $24.09 |
| Getinge USA Sales, LLC |
Food and Beverage
In-kind items and services
|
VASOVIEW HEMOPRO 2 | General | $15.83 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
General - Therapies | General | $15.08 |
| Getinge USA Sales, LLC |
Food and Beverage
In-kind items and services
|
VASOVIEW HEMOPRO 2 | General | $5.62 |
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 2016โ2022 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, 2017โ2023; 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
|
26 | 21 | $142.77 | $63.44 |
|
99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
|
18 | 17 | $265.89 | $103.89 |
|
93016
Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician
|
13 | 13 | $51.38 | $17.29 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 12 | 405 | $70.00 | โ |
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: 2026-06-17NUCC 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.
NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20260622003797
KS
7012280266
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
Mchs Hospitals Inc
1000 N Oak Ave, Marshfield, WI 544495703
Mchs Hospitals Inc
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
Secondary Practice Locations
929 Sw Mulvane St
Topeka, KS 666061677
Phone: 7852704100
1500 Sw 10th Ave
Topeka, KS 666041301
Phone: 7853546000
601 W Leota St
North Platte, NE 691016525
Phone: 3085688000
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
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Surgery - Trauma Surgery
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Nurse Practitioner - Gerontology
Nurse Practitioner
Nurse Practitioner
Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Physician Assistant (license number reported to NPPES: WI 8256)
Physician Assistant
Registered at MARSHFIELD CLINIC, 1000 N OAK AVENUE, MARSHFIELD, WI 54449 (Tel: 7153875511)
Registered at 1000 N OAK AVE, MARSHFIELD, WI 544495703 (Tel: 7153875511)
Physician Assistant (license number reported to NPPES: WI 8256)
NPI status registered as active in NPPES database
Registered at 601 W LEOTA ST, NORTH PLATTE, NE 691016525 (Tel: 3085688000)
Registered at 1741 GROVELAND CIR, LINCOLN, NE 685211719
Recorded as TRA BUI, PA
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Marshfield
- Nicole Kaiser
- Calistie Kumbier, PA
- Rita Mckinley, PA
- Amy Dean-Wojcik, PA
- Brent Kallembach, PA-C
- Fallon Roberts, PA-C
Mailing Address
1000 N Oak Ave
Marshfield, WI 544495703
Phone: 7153875511