Twyla K Clark
Physician Assistant โข Madison, WI
1821 S Stoughton Rd
Madison, WI 537162257
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 August 4, 2014; this date does not establish years in practice.
-
Published CMS data list 184 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.
-
Published Part B service records, 2024:
- 99213 โ Established patient outpatient office visit: 65 service units.
- 99214 โ Established patient outpatient office visit: 41 service units.
- 36415 โ Insertion of needle into vein for collection of blood sample: 38 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 5 records in the table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 523 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:
- Atorvastatin Calcium โ 69 prescription fills, including refills.
- Lisinopril โ 37 prescription fills, including refills.
- Levothyroxine Sodium โ 30 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 all 25 records in the table ยท Guide: How to read Medicare Part D prescriber data
-
Close to the middle for Medicare Part B services among clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: 207. Middle half: 73 to 407.
Close to the middle for Medicare Part B services among clinicians listed under Physician Assistant in Wisconsin (2024, 1,912 clinicians with data). Median for this group: 151. Middle half: 66 to 327.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 136 in 2020 to 184 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
1821 S Stoughton Rd
Madison, WI 537162257
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: Dean Health Systems 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
2014
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
94 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 $11,444 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 $7,862 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
1,317 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
$8,282 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.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $131.07 in 2025
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 2025.
Years since graduation
12 years (graduated 2014)
CMS Doctors and Clinicians data list 2014 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
2014
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)
Twyla Clark 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 Twyla Clark 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 Madison and Wisconsin
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: 207. Middle half: 73 to 407.
Close to the middle for clinicians listed under Physician Assistant in Wisconsin (2024, 1,912 clinicians with data). Median for this group: 151. Middle half: 66 to 327.
Medicare-allowed amount
Close to the middle for clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: $13,617. Middle half: $6,059 to $22,754.
Close to the middle for clinicians listed under Physician Assistant in Wisconsin (2024, 1,912 clinicians with data). Median for this group: $11,599. Middle half: $5,418 to $21,463.
Paid by Medicare
Close to the middle for clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: $9,933. Middle half: $4,521 to $16,383.
Close to the middle for clinicians listed under Physician Assistant in Wisconsin (2024, 1,912 clinicians with data). Median for this group: $8,471. Middle half: $3,957 to $15,807.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: 117. Middle half: 44 to 351.
More Part D prescriptions than 70% 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 higher Part D drug cost than 65% of clinicians listed under Physician Assistant in Madison, WI (2024, 214 clinicians with data). Median for this group: $1,417. Middle half: $314 to $19,090.
Close to the middle for 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.
396 active clinicians are listed under Physician Assistant with a practice address in Madison, WI (3,476 in Wisconsin).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Madison
18.7% of these 396 clinicians have the CMS telehealth indicator.
65.9% of these 396 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 increased 35% from 136 in 2020 to 184 in 2024.
- 2020: 136
- 2021: 258
- 2022: 215
- 2023: 266
- 2024: 184
-
Medicare-allowed amount
Medicare-allowed amount increased 40% from $8,175 in 2020 to $11,444 in 2024.
- 2020: $8,175
- 2021: $13,947
- 2022: $13,226
- 2023: $14,637
- 2024: $11,444
-
Paid by Medicare
Paid by Medicare increased 40% from $5,632 in 2020 to $7,862 in 2024.
- 2020: $5,632
- 2021: $9,505
- 2022: $8,870
- 2023: $9,861
- 2024: $7,862
-
Medicare Part D prescriptions
Medicare Part D prescriptions increased 290% from 134 in 2020 to 523 in 2024.
- 2020: 134
- 2021: 76
- 2022: 122
- 2023: 325
- 2024: 523
-
30-day fills
30-day fills increased 305% from 325 in 2020 to 1,317 in 2024.
- 2020: 325
- 2021: 174
- 2022: 338
- 2023: 860
- 2024: 1,317
-
Part D drug cost
Part D drug cost increased 335% from $1,903 in 2020 to $8,282 in 2024.
- 2020: $1,903
- 2021: $909
- 2022: $1,771
- 2023: $8,744
- 2024: $8,282
-
Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
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 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): fewer than 11 records totaling $131.07.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| BridgeBio Pharma, Inc. |
Food and Beverage
In-kind items and services
|
Attruby | General | $131.07 |
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 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 |
|---|---|---|---|---|
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
65 | 59 | $256.00 | $72.67 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
41 | 38 | $361.00 | $102.47 |
|
36415
Insertion of needle into vein for collection of blood sample
|
38 | 35 | $40.00 | $8.65 |
|
85027
Complete blood cell count (red cells, white blood cell, platelets), automated test
|
20 | 19 | $81.00 | $6.34 |
|
G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
20 | 20 | $1524.00 | $103.20 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 69 | 5,976 | $843.55 | 28 |
| Lisinopril | Lisinopril | 37 | 3,086 | $281.93 | 13 |
| Levothyroxine Sodium | Levothyroxine Sodium | 30 | 2,552 | $419.19 | 11 |
| Gabapentin | Gabapentin | 27 | 1,413 | $391.57 | โ |
| Losartan Potassium | Losartan Potassium | 27 | 2,121 | $432.75 | โ |
| Pantoprazole Sodium | Pantoprazole Sodium | 27 | 2,070 | $494.95 | โ |
| Amlodipine Besylate | Amlodipine Besylate | 26 | 1,927 | $215.90 | โ |
| Omeprazole | Omeprazole | 25 | 2,004 | $255.13 | 13 |
| Metformin Hcl Er | Metformin Hcl | 25 | 2,076 | $270.35 | โ |
| Fluticasone Propionate | Fluticasone Propionate | 21 | 810 | $215.86 | โ |
| Hydrochlorothiazide | Hydrochlorothiazide | 19 | 1,710 | $96.73 | โ |
| Furosemide | Furosemide | 18 | 1,537 | $135.62 | โ |
| Metoprolol Succinate | Metoprolol Succinate | 16 | 1,440 | $209.31 | โ |
| Fluoxetine Hcl | Fluoxetine Hcl | 16 | 1,196 | $302.39 | โ |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 16 | 1,440 | $221.75 | โ |
| Trazodone Hcl | Trazodone Hcl | 15 | 840 | $186.46 | โ |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 15 | 372 | $416.42 | โ |
| Estradiol | Estradiol | 13 | 1,110 | $934.65 | โ |
| Ventolin Hfa | Albuterol Sulfate | 13 | 434 | $1,033.06 | โ |
| Alendronate Sodium | Alendronate Sodium | 12 | 616 | $85.93 | โ |
| Metformin Hcl | Metformin Hcl | 12 | 656 | $223.08 | โ |
| Sertraline Hcl | Sertraline Hcl | 11 | 844 | $196.05 | โ |
| Citalopram Hbr | Citalopram Hydrobromide | 11 | 990 | $119.94 | โ |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 11 | 990 | $197.41 | โ |
| Ezetimibe | Ezetimibe | 11 | 920 | $102.18 | 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: 2020-11-05NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20140909001121
WI
8325267206
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
Dean Health Systems Inc
515 22nd Ave, Monroe, WI 535661569
Phone: 6083242000
Dean Health Systems Inc
700 S Park St, Madison, WI 537151830
Phone: 6082602900
Dean Health Systems Inc
752 N High Point Rd, Madison, WI 537172236
Phone: 6088244000
Dean Health Systems Inc
1211 Fish Hatchery Rd, Madison, WI 537151909
Phone: 6082528000
Dean Health Systems Inc
700 S Park St, Madison, WI 537151830
Phone: 6082516100
Dean Health Systems Inc
1821 S Stoughton Rd, Madison, WI 537162257
Phone: 6082606000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Physician Assistant - Medical
Physician Assistant (Certified)
Nurse Practitioner
Advanced Practice Nurse Prescriber
Psychologist
Doctor of Philosophy (Ph.D.)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated August 04, 2014.
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 Physician Assistants in Madison
- Joanie Klemme, PA-C
- Daniel Wallner, PA-C
- Aimee Mastrangelo, PA
- Amber Saleemi, PA-C
- Mark Diaz, PA-C
- Erik Bonifas, PA-C
Mailing Address
1821 S Stoughton Rd
Madison, WI 537162257
Phone: 6082606000