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MR. MARK DWAYNE ASMUSSEN P.A.
NPI 1134427602
Physician Assistant in Brenham, TX

Active since March 08, 2011PECOS EnrolledAccepts Medicare Assignment
600 N PARK ST, BRENHAM, TX 77833(979) 836-6153(979) 277-9074 Get Directions Write a Review

NPPES record last updated: September 8, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 8, 2025, Sep 4, 2020, Jul 11, 2019 and 3 more (6 updates tracked since 2015).

About Mr. Mark Dwayne Asmussen P.a. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. MARK DWAYNE ASMUSSEN P.A. (NPI 1134427602) is an individual physician assistant in Brenham, Texas, licensed in Texas (PA07059) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS, is affiliated with Baylor Scott & White Hospital Brenham, and is a graduate of Other (2010).

NPPES Registry Identity

NPI1134427602
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. MARK DWAYNE ASMUSSENCredential: P.A.
Location Address600 N PARK STBrenham, TX 77833-2610
Mailing AddressPo Box 844658Dallas, TX 75284-4658
Phone(979) 836-6153
Fax(979) 277-9074
Sole ProprietorNo
Medical School CMSOtherGraduated 2010
Enumeration DateMarch 8, 2011
Last NPPES UpdateSeptember 8, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 8, 2025
✔ NPI 1134427602 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in TX · PA07059
Definition
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.
Also ListedPhysician Assistant · SurgicalTaxonomy 363AS0400X · License PA07059 (TX)
600 N PARK ST, Brenham, TX 77833
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Other Identifiers 2

OtherPA07059TX · Texas State License
Medicaid309349401TX

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Mark Dwayne Asmussen P.a. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6709063456
PECOS Enrollment IDI20110606000262
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
223 services172 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
90 services88 patients
Automated urinalysis test 81003
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
42 services38 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
35 services35 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
31 services30 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
12 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Baylor Scott & White Hospital Brenham

Critical Access Hospitals · Brenham, TX
OwnershipVoluntary non-profit - Private
CMS Certification Number451397
Location700 Medical ParkwayBrenham, TX 77833 · Washington County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77833 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AURBREY HANATH EIKENHORST FNP
Nurse Practitioner (Family)
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
KATHERINE ELIZABETH ALFORD PA-C
Physician Assistant
600 N PARK ST, BRENHAM CLINIC
BRENHAM, TX 77833
Washington County (979) 830-0508
DR. CAITLIN MORGAN CONNER MD
Family Medicine
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
DR. CASSANDRA M BRYANT MD
Pediatrics
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
JESSICA LYNN GEMINA MOHR PA-C
Physician Assistant
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
WILLIAM KLINGSPORN
Surgery
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
DR. WILLIAM ROBERT LOESCH M.D.
Internal Medicine
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
ERIC N ALFORD MD
Family Medicine
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Asmussen's NPI number?

The NPI number for Mark Asmussen is 1134427602. It was assigned to this individual provider in the NPPES registry on March 8, 2011.

Where is Mark Asmussen located?

Mark Asmussen practices at 600 N Park St, Brenham, TX 77833. The listed phone number is (979) 836-6153.

What is Mark Asmussen's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Mark Asmussen enrolled in Medicare?

Yes. Mark Asmussen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Mark Asmussen affiliated with any hospitals?

According to CMS data, Mark Asmussen is affiliated with Baylor Scott & White Hospital Brenham.

When was this NPI record last updated?

The NPPES record for Mark Asmussen was last updated on September 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.