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Make Health Part of Your New Year—Not Just a Resolution

Allergies, asthma, and immune concerns don’t have to hold you back. Get clear answers, personalized care, and a plan that supports how you want to feel this year.

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William Farrow Long, M.D.
Board certified allergist and immunologist from Belton, Texas. Served as chief of allergy, asthma, and immunology service at Tripler Army Medical Center in Honolulu. Activated with the 4005th US Army Hospital for Desert Storm and Operation Joint Endeavor during the Bosnia Peace Effort. Earned BS from UT Austin and Baylor University, MD from Texas Tech University School of Medicine, and completed fellowship at Fitzsimmons Army Medical Center and National Jewish Hospital in Denver.
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Locations Served
Killeen Temple
Paula Lansford-Seabaugh, D.O.
Native Texan who relocated to the Temple, Belton, Killeen area in 2025. Earned Bachelor of Science in Biochemistry, Magna Cum Laude, from Abilene Christian University. Received osteopathic medical degree from UNTHSC Texas College of Osteopathic Medicine in Fort Worth and completed residency at Texas A&M Family Medicine Residency in College Station. Enjoys spending time in the community and at home with her husband and two daughters.
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Locations Served
Killeen Temple
Megan Ruhnke, PA-C
Board certified physician assistant with over 4 years of experience in allergy, asthma, and immunology. Earned Bachelor of Science in Nutrition Sciences from Texas A&M University and Master of Physician Assistant Studies from Texas Tech University Health Science Center. Member of the Texas Allergy, Asthma, and Immunology Society and Association of Physician Assistants in Allergy Asthma and Immunology.
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Locations Served
Killeen Temple
Stephanie Long, MSN, APRN, FNP-C
Board certified Family Nurse Practitioner specializing in allergy care. Earned Bachelor of Science in Nursing from Louise Herrington School of Nursing at Baylor University and Master of Science in Nursing from Scott & White School of Nursing at University of Mary Hardin-Baylor. Board certified by the American Academy of Nurse Practitioners and member of Sigma Theta Tau International Honor Society for Nursing.
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Locations Served
Killeen Temple

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Testing & Treatment Options

Drug Testing

Drug Allergy Testing

Request an appointment with Harker Heights Allergy so we can help you determine whether or not you have a true drug allergy.Learn More »

Allergy Shots

Traditional Immunotherapy

When medications and lifestyle changes do not alleviate frustrating allergy symptoms, immunotherapy can provide much-needed relief.Learn More »

Allergy Shots

Cluster Immunotherapy

A Harker Heights Allergy personalized, tailored Cluster Immunotherapy treatment plan can provide long-lasting, rapid allergy relief.Learn More »

Biologics

Biologics

Allergy and immunology treatment options continue to expand, thanks in large part to a drug class called biologics.Learn More »

Insect Sting Testing

Insect Sting Testing

Harker Heights Allergy can test for allergies to bees, yellow jackets, hornets, and wasps.Learn More »

Pet Allergy Testing

Pet Allergy Testing

Make sure your symptoms are pet-related, before re-homeing a furry friend!Learn More »

Food Allergy Testing

Food Allergy Testing

Food allergies can change how people navigate their lives, so having an accurate diagnosis is crucial.Learn More »

Blood Testing

Blood Testing

Blood tests can screen for regional allergy environmental allergy triggers, in addition to indoor and food allergens as well as stinging insects.Learn More »

Skin Testing

Skin Testing

A critical piece of pinpointing allergies can be achieved with skin testing - scratching or pricking the skin with an extract of the allergen to test for a reaction.Learn More »

Patch Testing

Patch Testing

Patch Testing determines whether a host of potential allergens may be triggering eczema or allergic skin irritation.Learn More »

Oral Food Challenge

Oral Food Challenge

Oral food challenges are widely regarded as the “gold standard” for accurate food allergy diagnosis and involve ingesting a small amount of a potential allergen.Learn More »

Allergy Shots

Allergy Shots

Harker Heights Allergy offers traditional immunotherapy as well as cluster (rapid desensitization) immunotherapy.Learn More »

Sublingual Allergy Drops

Allergy Drops – Sublingual

Patients seeking long-term allergy relief should consider the benefits of immunotherapy. Learn More »

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Conditions That We Treat

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Success Stories

"Words cannot express how wonderful I feel now since getting my allergy shots and the relief of the symptoms. I would recommend Dr. Long not only for allergies but for internal medicine as well!!! Being in the Medical Profession as a Registered Nurse myself I have known Dr. Long is thorough and makes the time to sit and talk with me. Thank you so much Dr. Long and all your staff...." -Leslie M., RN

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