Select physicians and advanced practice clinicians (APCs) from ARC East 7th, ARC Goodnight Ranch, ARC South 1st, ARC South 1st Pediatrics (formerly ARC South 1st Specialty & Pediatrics), and ARC Southwest are relocating to our new clinic, ARC South Specialty, this summer.
If this move affects any of your scheduled appointments, you will receive communications via email, text, or phone. Please review all notifications from ARC before any upcoming appointments.
Schedule your flu shot at your nearest ARC clinic to stay protected. It's easy to get your flu shot:
Austin Regional Clinic (ARC) doctors, staff, and leadership are committed to providing our community with high quality convenient care. One of the ways we demonstrate this priority is through our online transparency.
You can review our provider ratings and comments on our web site with the confidence that they are all based on verified visits. We post all patient feedback relevant to the entire visit and only refrain from posting comments that are libelous, profane, or those that risk the privacy of our patients.
The below guide provides details about how we collect and share our patient feedback.
Patients for whom we have a mobile phone number receive a text survey within two hours of checking in for their visit. Patients are asked to complete the survey and provide ratings and comments regarding their experience at different touch points of their visit. We use this feedback to recognize doctors and staff, identify issues we can correct, and enhance our care.
ARC posts all positive and negative patient feedback that is relevant to the entire visit. We refrain from posting comments that are libelous, profane, or those that risk the privacy of our patients.
ARC asks questions that touch on the overall patient experience related to their visit. Anyone seeking detailed information about each question can view the ratings for each specific question on the Reviews tab on the provider bio page on the website. We calculate our provider star ratings based on the responses to question number six below. We calculate our location star ratings based on the responses to all the below questions.
Since more recent data provides a more accurate picture, we require a minimum of 30 patient surveys per doctor in the last 12 months before we post a physician’s rating.
ARC physicians and staff review all comments and act to rectify issues. Since the purpose of the feedback is to allow us to improve the overall patient experience, we display the last 90 days of comments which are the most relevant for the practice.
No. Only patients having an outpatient visit by an ARC physician receive a survey. The results are based entirely from patients who have actually been treated by the physician in our clinics.
Comments are reviewed and approved prior to being published to the website. If a comment contains any personally identifiable information, that information will be removed from the comment.
Dr. Darnall grew up in Jackson, MS. In his free time, he enjoys spending time with his wife and two daughters and their two dogs. Dr. Darnall likes to exercise by swimming and trail running, and he enjoys cooking and traveling with friends. His favorite Central Texas spot is Barton Springs pool.
In school, my favorite courses were in the biological sciences. I loved learning about the natural world and scientific discoveries, but I was not drawn to research. Medicine offered a practical application for science that would let me care for patients and continue to learn. I became fascinated with the brain and neurophysiology. Sleep medicine emerged as a new frontier in neuroscience that has direct and indirect effects on quality of life, performance, and overall health. My approach is to be kind, to listen, to advise, and to collaborate with my patients in selection of tools that provide the best means of symptomatic improvement.
ARC sleep neurologists order and interpret diagnostic sleep studies, including polysomnography, multiple sleep latency tests, and home sleep tests.
ARC sleep neurologists provide care for a variety of sleep disorders, including obstructive and central sleep apnea, narcolepsy, idiopathic hypersomnia, parasomnia, REM sleep behavior disorder, sleep terrors, sleepwalking, restless legs syndrome, periodic limb movement disorder, circadian rhythm disorders, and insomnia.
737-247-7200 Fax: 512-406-7368
Rating based on "Did the healthcare provider or doctor provide the care you expected?"
Kind, professional, he listened and answered my questions. He explained next steps. Very pleasant doctor.
Friendly staff and Dr Darnall was thorough and answered all my questions. Great Doctor.
Dr. Darnall was kind, caring and yet very professional.
Dr. Darnall was excellent. He was willing to spend time and answer all of my questions. I appreciated his attention and would recommend him to friends and family.
Dr Darnall is great. Clearly knows his stuff
Nice demeanor. Easy clear explanations. Good ideas
Welcome to the ARC Neurology team at ARC Four Points!
February 18, 2026 1 min read
Surgical providers are specially trained and licensed physicians who can perform surgical procedures to treat injuries, diseases, and other health conditions. Surgical providers can also diagnose and manage medical conditions, oversee pre-operative and post-operative care, and work closely with your primary care team to coordinate your care.
Non-surgical providers are highly trained and licensed physicians, physician assistants, and nurse practitioners who specialize in diagnosing, managing, and treating medical conditions through non-surgical medical care.
Children (ages 3-11) Adolescents (ages 12-18) Toddlers (ages 0-2)