Dr. David J Simenstad , MD
Orthopaedic Surgery • Marshfield, WI
1000 N Oak Ave
Marshfield, WI 544495703
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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Dr. David Simenstad is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on September 20, 2006; this date does not establish years in practice.
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Published CMS data list 153 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99214 — Established patient outpatient office visit: 39 service units.
- 27447 — Replacement of knee joint, both sides of knee: 34 service units.
- 99204 — New patient outpatient office visit: 32 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See all 5 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 91 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:
- Amoxicillin — 78 prescription fills, including refills.
- Azithromycin — 13 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 the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 60% of clinicians listed under Orthopaedic Surgery in Wisconsin (2024, 347 clinicians with data). Median for this group: 144. Middle half: 53 to 297.
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 431 in 2019 to 153 in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019–2023.
Practice Location & Contact Primary Location
1000 N Oak Ave
Marshfield, WI 544495703
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
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $75,749 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 – by Provider and Service, 2023.
Paid by Medicare
About $58,950 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 – by Provider and Service, 2023.
30-day fills
91 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
$131 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
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.
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, “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. Simenstad 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. Simenstad 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 60% of clinicians listed under Orthopaedic Surgery in Wisconsin (2024, 347 clinicians with data). Median for this group: 144. Middle half: 53 to 297.
Too few clinicians listed under Orthopaedic Surgery in Marshfield have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Orthopaedic Surgery in Wisconsin (2024, 347 clinicians with data). Median for this group: $805. Middle half: $195 to $1,931.
Too few clinicians listed under Orthopaedic Surgery in Marshfield have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Simenstad are from 2023.
11 active clinicians are listed under Orthopaedic Surgery with a practice address in Marshfield, WI (656 in Wisconsin).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Marshfield
18.2% of these 11 clinicians have the CMS telehealth indicator.
63.6% of these 11 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 65% from 431 in 2019 to 153 in 2023.
- 2019: 431
- 2020: 295
- 2021: 437
- 2022: 321
- 2023: 153
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Medicare-allowed amount
Medicare-allowed amount decreased 38% from $122,094 in 2019 to $75,749 in 2023.
- 2019: $122,094
- 2020: $86,032
- 2021: $123,354
- 2022: $109,906
- 2023: $75,749
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Paid by Medicare
Paid by Medicare decreased 39% from $95,968 in 2019 to $58,950 in 2023.
- 2019: $95,968
- 2020: $67,075
- 2021: $96,245
- 2022: $85,926
- 2023: $58,950
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 72% from 329 in 2020 to 91 in 2024.
- 2020: 329
- 2021: 424
- 2022: 460
- 2023: 369
- 2024: 91
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30-day fills
30-day fills decreased 73% from 337 in 2020 to 91 in 2024.
- 2020: 337
- 2021: 432
- 2022: 460
- 2023: 369
- 2024: 91
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Part D drug cost
Part D drug cost decreased 88% from $1,100 in 2020 to $131 in 2024.
- 2020: $1,100
- 2021: $1,449
- 2022: $1,952
- 2023: $625
- 2024: $131
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2022 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, 2017–2023; 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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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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39 | 38 | $383.72 | $93.12 |
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27447
Replacement of knee joint, both sides of knee
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34 | 32 | $14889.00 | $1185.87 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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32 | 32 | $493.83 | $126.51 |
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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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26 | 25 | $224.97 | $62.95 |
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27130
Replacement of thigh bone and hip joint with prosthesis
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22 | 20 | $14893.00 | $1186.96 |
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 |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 78 | 114 | $89.80 | 55 |
| Azithromycin | Azithromycin | 13 | 27 | $41.45 | — |
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: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20050919000050
WI
7315850633
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.
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
NPI enumerated September 20, 2006.
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 Orthopaedic Surgery Specialists in Marshfield
- Dr. Owen Keenan, MD
- Dr. Jacob Lonsdale, MD
- Dr. Rachel Randall, MD
- Dr. Robert Cagle, MD
- Dr. Kenneth Stone, MD
- Dr. Jeff Tavassoli, DO
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Mailing Address
1000 N Oak Ave
Marshfield, WI 544495703
Phone: 7153875511