We treat PEDIATRIC & ADULT allergy, asthma and immune system issues

Discover the CAUSE of your allergies

You can live life to the fullest with the help of OUR ALLERGISTS

We won’t let your ASTHMA slow you down

We’re all in this TOGETHER

Allergy, Asthma & Clinical Immunology Specialists covering the Greater Philadelphia region and the Main Line for 50+ years

Main Line Allergy, LLP, based out of Philadelphia is a private practice specializing in allergy, asthma, and clinical immunology. Our allergy and asthma specialist doctors have extensive experience in the diagnosis and management of all aspects of these conditions and have been providing care for pediatric and adult patients on the Main Line and surrounding areas for over 50 years.

Our physicians are expert in the medical treatment of these disorders including:

Hives (urticaria), eczema (atopic dermatitis), and other allergic skin conditions
Allergy shots for seasonal and environmental allergies / hayfever
Diagnosis and treatment of environmental, sports-induced, and other forms of asthma
Oral immunatherapy for peanut allergy

We employ a variety of specialized on-site diagnostic testing modalities including:

Pulmonary function (breathing) testing, exhaled nitric oxide, and other specialized breathing tests for asthma.
Skin testing (needle-free for younger children) for environmental (hayfever), food, stinging insect, medication, and vaccine allergies
Oral ingestion testing for various food and medication allergies

Our allergy & asthma specialists and staff are dedicated to providing the highest quality medical care that has come to be known as the standard at our practice, in a caring and warm private office setting. We believe in a patient-oriented approach to diagnosis and continuing care and strive to achieve this through close collaboration with our patients and their families, with an emphasis on patient education. Our allergy and asthma doctors are available for routine and emergent consultation appointments for new patients Monday through Friday during office hours, and available to our current patients for urgent issues on-call after hours, weekends, and all holidays 7 days a week, 365 days a year.

Main Line Allergy currently has three offices located in Ardmore, King of Prussia, and Horsham. All of our physicians are board-certified to care for children and adults by the American Board of Allergy and Immunology, and several have won awards for their outstanding care and expertise in our field. We participate in all major insurance plans and currently accept new patients from infancy through 49 years old.

Learn More

Our Team

All of the physicians at Main Line Allergy, LLP, are board certified diplomats of the American Board of Allergy and Immunology.
They are all formally trained in both pediatric and adult allergy, asthma, and clinical immunology, and are all members/fellows of either the American Academy and/or American College of Allergy, Asthma, and Immunology.

All hold staff appointments at Bryn Mawr Hospital, The Childrens Hospital of Philadelphia, and/or St. Christopher’s Hospital for Children.

Jack M. Becker

A. Geoffrey DiDario

Janet L. Beausoleil

Jennifer A. Kannan

Hillary Gordon

Changes to 2025 Office/Allergy Shot Hours

All Offices

5/23/25, all offices closed

5/26/25, all offices closed

6/13/25, all offices closed

6/20/25, all offices closed

7/11/25, all offices closed

8/8/25, all offices closed

8/15/25, all offices closed

9/1/25, all offices closed

11/27/25, all offices closed

11/28/25, all offices closed

Ardmore

SEE ABOVE

9/10/25 SHOTS END AT 4:30 PM

11/26/25

King of Prussia

SEE ABOVE

5/23/25

7/16/25

Fridays 5/30/25 – 9/26/25

11/26/25 SHOTS END AT 4:00 PM

Horsham

SEE ABOVE

11/26/25 SHOTS END AT 4:00 PM

Regular Office Hours

ardmore

Ph: (610) 642-1643

MON	8:15 am - 11:30 am
	1:00 pm - 7:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 7:00 pm

TUES	8:15 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

WED	8:15 am - 11:30 am
	1:00 pm - 7:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 7:00 pm

THURS	8:15 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

FRI	8:15 am - 11:30 am
SHOTS	No Shots

Office Hours

King of Prussia

Ph: (610) 768-9323

MON	8:15 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

TUES	8:15 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

WED	8:15 am - 11:30 am
	1:00 pm - 6:00 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 6:00 pm

THURS	8:15 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

FRI	8:15 am - 11:30 am
SHOTS	8:30 am - 11:30 am

Office Hours

Horsham

Ph: (215) 657-8150

MON	9:00 am - 11:30 am
	1:00 pm - 3:00 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 3:00 pm

TUES	9:00 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

WED	9:00 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 6:00 pm

THURS	9:00 am - 11:30 am
	1:00 pm - 4:30 pm
SHOTS	8:30 am - 11:30 am
	1:00 pm - 4:30 pm

FRI	Closed
SHOTS	Closed

Office Hours