Mark Dwayne Asmussen , PA
Physician Assistant โข Brenham, TX
600 N Park St
Brenham, TX 778332610
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 March 8, 2011; this date does not establish years in practice.
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Published CMS data list 1,794 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.
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Published Part B service records, 2024:
- J1010 โ Injection, methylprednisolone acetate, 1 mg: 1,320 service units.
- 99214 โ Established patient outpatient office visit: 223 service units.
- 99213 โ Established patient outpatient office visit: 90 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 8 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 1,214 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.
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Published Part D records, 2024:
- Methylprednisolone โ 104 prescription fills, including refills.
- Azithromycin โ 53 prescription fills, including refills.
- Doxycycline Monohydrate โ 53 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 45 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: 211. Middle half: 76 to 593.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 99 in 2020 to 1,794 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
600 N Park St
Brenham, TX 778332610
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 3 distinct group names: Houston Methodist Specialty Physicians; Scott And White Clinic; Tmh Physician Associates Pllc. 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
2010
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
259 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 $35,529 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 $21,016 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
2,179 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
$44,013 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)
No Open Payments records are listed for this clinician for 2021โ2025.
Years since graduation
16 years (graduated 2010)
CMS Doctors and Clinicians data list 2010 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
2011
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)
Mark Asmussen 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 Mark Asmussen 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 Brenham and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: 211. Middle half: 76 to 593.
Too few clinicians listed under Physician Assistant in Brenham have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: $15,434. Middle half: $6,111 to $35,691.
Too few clinicians listed under Physician Assistant in Brenham have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Physician Assistant in Texas (2024, 4,400 clinicians with data). Median for this group: $11,276. Middle half: $4,395 to $26,238.
Too few clinicians listed under Physician Assistant in Brenham have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 75% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: 261. Middle half: 73 to 938.
Too few clinicians listed under Physician Assistant in Brenham have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: $7,999. Middle half: $749 to $103,240.
Too few clinicians listed under Physician Assistant in Brenham have Medicare Part D data for 2024 to compare.
11 active clinicians are listed under Physician Assistant with a practice address in Brenham, TX (11,008 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Brenham
9.1% 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 increased 1712% from 99 in 2020 to 1,794 in 2024.
- 2020: 99
- 2021: 519
- 2022: 658
- 2023: 830
- 2024: 1,794
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Medicare-allowed amount
Medicare-allowed amount increased 578% from $5,242 in 2020 to $35,529 in 2024.
- 2020: $5,242
- 2021: $35,409
- 2022: $50,710
- 2023: $68,724
- 2024: $35,529
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Paid by Medicare
Paid by Medicare increased 503% from $3,483 in 2020 to $21,016 in 2024.
- 2020: $3,483
- 2021: $26,427
- 2022: $35,055
- 2023: $47,480
- 2024: $21,016
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 164% from 460 in 2020 to 1,214 in 2024.
- 2020: 460
- 2021: 635
- 2022: 713
- 2023: 1,234
- 2024: 1,214
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30-day fills
30-day fills increased 229% from 663 in 2020 to 2,179 in 2024.
- 2020: 663
- 2021: 1,096
- 2022: 1,270
- 2023: 2,278
- 2024: 2,179
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Part D drug cost
Part D drug cost increased 175% from $16,021 in 2020 to $44,013 in 2024.
- 2020: $16,021
- 2021: $24,759
- 2022: $19,979
- 2023: $41,937
- 2024: $44,013
Sources: CMS Medicare Physician & Other Practitioners (2024), 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 ยท Report an error.
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 |
|---|---|---|---|---|
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J1010
Injection, methylprednisolone acetate, 1 mg
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1,320 | 18 | $1.30 | $0.13 |
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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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223 | 172 | $209.00 | $100.83 |
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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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90 | 88 | $142.00 | $71.72 |
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81003
Automated urinalysis test
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42 | 38 | $20.00 | $2.16 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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41 | 38 | $32.29 | $13.10 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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35 | 35 | $219.00 | $104.80 |
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96372
Injection of drug or substance under skin or into muscle
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31 | 30 | $49.00 | $11.57 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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12 | 11 | $280.00 | $146.91 |
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 |
|---|---|---|---|---|---|
| Methylprednisolone | Methylprednisolone | 104 | 624 | $543.21 | 101 |
| Azithromycin | Azithromycin | 53 | 265 | $163.11 | 51 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 53 | 524 | $440.59 | 49 |
| Levothyroxine Sodium | Levothyroxine Sodium | 52 | 3,865 | $588.53 | 18 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 51 | 4,269 | $553.14 | 23 |
| Atorvastatin Calcium | Atorvastatin Calcium | 49 | 3,990 | $387.38 | 22 |
| Gabapentin | Gabapentin | 43 | 1,837 | $823.58 | 20 |
| Lisinopril | Lisinopril | 42 | 3,124 | $454.36 | 15 |
| Tizanidine Hcl | Tizanidine Hcl | 42 | 407 | $182.38 | 37 |
| Amlodipine Besylate | Amlodipine Besylate | 38 | 3,390 | $331.26 | 16 |
| Meloxicam | Meloxicam | 37 | 724 | $55.38 | 28 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 34 | 156 | $61.78 | 31 |
| Pantoprazole Sodium | Pantoprazole Sodium | 31 | 1,979 | $232.60 | 15 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 30 | 1,441 | $1,992.83 | 16 |
| Losartan Potassium | Losartan Potassium | 29 | 2,550 | $227.47 | 11 |
| Prednisone | Prednisone | 26 | 217 | $58.33 | 21 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 26 | 160 | $76.11 | 26 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 25 | 1,290 | $328.75 | โ |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 25 | 237 | $178.16 | 23 |
| Metformin Hcl | Metformin Hcl | 24 | 2,160 | $216.19 | 12 |
| Duloxetine Hcl | Duloxetine Hcl | 23 | 1,470 | $481.46 | 12 |
| Tamsulosin Hcl | Tamsulosin Hcl | 22 | 1,560 | $164.07 | โ |
| Sertraline Hcl | Sertraline Hcl | 21 | 1,342 | $154.28 | โ |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 21 | 579 | $487.99 | 18 |
| Metoprolol Succinate | Metoprolol Succinate | 21 | 1,790 | $273.54 | โ |
(top 25 shown)
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: 2025-09-08NUCC 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: 363AS0400X
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20110606000262
TX
6709063456
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
Scott And White Clinic
1280 Arrington Rd, College Station, TX 778458696
Phone: 9792076550
Tmh Physician Associates Pllc
None, Houston, TX 77070
Phone: 2817370899
Scott And White Clinic
600 N Park St, Brenham, TX 778332610
Phone: 9798366153
Houston Methodist Specialty Physicians
6445 Main St, Houston, TX 770301502
Phone: 7134413150
Scott And White Clinic
600 N Park St, Brenham, TX 778332610
Phone: 9798366153
Tmh Physician Associates Pllc
7575 San Felipe St, Houston, TX 770631777
Phone: 7132669955
Tmh Physician Associates Pllc
18220 State Hwy 249, Houston, TX 770704347
Phone: 2817378300
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 Practitioner - Adult Health
Adult Nurse Practitioner
Family Medicine
Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Family Nurse Practitioner
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at PO BOX 844658, DALLAS, TX 752844658
Physician Assistant (license number reported to NPPES: TX PA07059)
Registered at 600 N PARK ST, BRENHAM, TX 778332610 (Tel: 9798366153)
Registered at PO BOX 844658 SUITE A, DALLAS, TX 752844658
NPI status registered as active in NPPES database
Registered at 118 SHENANDOAH DR, SUITE A, SHENANDOAH, TX 773811204 (Tel: 2815834000)
Registered at 118 SHENANDOAH DR, SUITE A, SHENANDOAH, TX 773811204 (Tel: 2815834000)
Recorded as MARK ASMUSSEN, P.A.
Physician Assistant (license number reported to NPPES: TX PA07059)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Brenham
- Mark Clancy, PA
- Kristin Krenek, PA-C
- Matthew Boutte, PA-C, MPAS
- Katherine Alford, PA-C
- Linda Aldama, PA
- Kristen Meaders, PA-C
Mailing Address
Po Box 844658
Dallas, TX 752844658