Jason S. Ling, MD
Fullerton, CA 92835
- Mission Heritage Medical Group and Affiliated Physicians
- St. Joseph Heritage Medical Group and Affiliated Physicians
- St. Jude Heritage Medical Group and Affiliated Physicians
Fullerton, CA 92835
St. Jude Heritage Fullerton - Endocrinology
100 East Valencia Mesa Drive, Suite 105, Fullerton, CA 92835
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About Jason S. Ling
Dr. Jason Ling is a board-certified Endocrinology Specialist based in Fullerton, California. He is also board-certified in Obesity Medicine, Clinical Lipidology, and Certified Clinical Densitometry by the International Society for Clinical Densitometry.
Serving as the physician site director of St. Jude's Endocrinology group, he plays a role in overseeing and leading the endocrinology team. Additionally, Dr. Ling serves as the co-medical director of the Bone Health Program at St. Jude, where his goals are to prevent reoccurring fractures.
Stony Brook University School of Medicine
2016
Hofstra Northwell School of Medicine
2018
St. George's University School of Medicine
2013
Stony Brook University
2014
- American Board of Internal Medicine, Internal Medicine
- American Board of Internal Medicine, Endocrinology Diabetes and Metabolism
- American Board of Internal Medicine Internal Medicine, Internal Medicine
100 East Valencia Mesa Drive, Suite 105
Fullerton, CA 92835
Providence St. Jude Medical Center
Community Reviews
At Providence, we're dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.
As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
No problem and appreciate his care
Providence Patient
Very customer service oriented and always a good experience!
Providence Patient
Dr. Lin is a great Dr. He's very thorough and knowledgeable. I'm glad to have him as my Dr.
Providence Patient
Good
Providence Patient
Dr. Ling very knowledgeable and took time to answer my questions. He also gave me information to help with lowering my cholesterol. And recommended device to monitor my sugar for wellness and improving my scores.
Providence Patient
The care that I received with this provider was very good!
Providence Patient
So far, so good.
Providence Patient
Dr Ling paid special attention to my state of mind, because I had recently experienced the passing of my husband.
Providence Patient
Very professional
Providence Patient
Dr. Ling is always very attentive and he asks questions appropriate for my current complaints. He has always given me excellent advice.
Providence Patient
All good, nothing bad
Providence Patient
Dr . Is patient and explain all my issues thoroughly. Not in a rush
Providence Patient
Dr Ling and his staff were very friendly and helpful. Dr ling took the time to explain my past test results, answered my questions and rlgave me recommendations for for care and testing in the future.
Providence Patient
I am so thankful for Dr. Ling. With my health he goes above and beyond and looks at everything. He has ordered tests to see what is going on and he keeps me well informed. His office staff also is very kind and schedules the next appointment right after. I am very thankful for the experience from start to finish.
Providence Patient
Everyone that I came in contact with was very professional
Providence Patient
All is good and hopefully will continue to be.
Providence Patient
Dr. Ling is the best doctor, always on top of my diabetes and seems to really care about my health. Very encouraging and motivates me to do better.
Providence Patient
Nothing to add. As already stated, everything is great with this doctor and staff.
Providence Patient
Dr Ling is an excellent physician and very attentive to your needs.
Providence Patient
Good
Providence Patient
Dr. Ling was thorough, kind, informative and heloful
Providence Patient
Good
Providence Patient
He is willing to answer my questions. I am so comfortable during this appointment.
Providence Patient
Fantastic doctors and staff.
Providence Patient
Dr. Ling continues to be the type of doctor everyone should have. He is so nice and professional. He continues to monitor my progress and I appreciate him. He is very caring and compassionate person. All other doctors should emulate Dr. Ling. Dr. Ling thank you for being such a great human!
Providence Patient
Good
Providence Patient
Extremely careful, detail, patient, polite and knowledgeable physician.
Providence Patient
Dr. Ling and his team have always been courteous and respectful with me. Their willingness to listen to my questions and concerns matters to me and makes me feel confident that the care plan will work for me.
Providence Patient
Dr. Ling is an excellent endocrinologist.
Providence Patient
Dr. Jason Ling is very professional and a good listener. Really feel care for and understood.
Providence Patient
Extremely careful and treated us like taking care of his parents.
Providence Patient
Dr. Ling is the best doctor in the world
Providence Patient
All good. Thank you listening and explaining the treatment plan.
Providence Patient
Dr Ling, has always taken the time to listen to concerns I may have regarding my plan of care. I never feel rushed during my appointment.
Providence Patient
Excellent
Providence Patient
I found Dr. Ling attentive and caring.
Providence Patient
Dr Ling is very good but I guess my questions for him are the same answers so he tends to repeat himself to all his patients daily -For me it was the first time hearing the info I also had to wait over six months to see him Making an appt is vey time consuming
Providence Patient
No Bad experience with this provider. My experiences were always good. This is the third time I was treated by this provider.
Providence Patient
Dr Ling was very knowledgeable and explained things thoroughly!
Providence Patient
Dr. Ling is knowledgable and Is a great listener. He helped me feel at ease and Is sincere. Helpful and great provider.
Providence Patient
Excellent care and service as always!
Providence Patient
Dr Ling is a very caring doctor, very happy with him.
Providence Patient
Great doctor and staff.
Providence Patient
Kind doctor always has a smile for you makes you feel at ease.
Providence Patient
Dr Ling is an excellent physician providing me with excellent care. His staff work well together and communicate timely and efficiently with me.
Providence Patient
Dr Ling is the best! He really listens and helps. He is a great doctor.
Providence Patient
Dr. Ling is always very caring and professional. I am very confident in Dr. Ling medical care and advice. Office staff is always pleasant and respectful.
Providence Patient
Great Doctor
Providence Patient
1. Dr. Ling is an exceptional endocrinologist and has been managing my health over the last few years.
Providence Patient
The doctor was very courteous and answered all my questions.
Providence Patient
Dr. Ling is a joy to see. He knows my test, conditions, recommendations, and all with a smile. That is unusual in this day of medical services.
Providence Patient
Routine visit. Basically same information as prior visits
Providence Patient
Dr ling thoroughly answered the questions I had.
Providence Patient
I am very happy that Dr. Ling is my doctor and he's a very caring person and wants me to get better
Providence Patient
I have always had a god experience with Dr Ling, He knows my history and is is very easy to converse with and is always very helpful.
Providence Patient
I always like a fuller explanation.
Providence Patient
He is very professional and considerate.
Providence Patient
This care provider is fine with primary directive but does not seem to listen to get to root cause of issues causing me to find answers on my own or go elsewhere and use this office for basic monitoring
Providence Patient
KEEP UP THE EXCELENT WORK!!!
Providence Patient
I use MyChart to send questions and to ask for medication refills to Dr. Ling. I appreciate that I receive and answer from Dr. Ling within 24 hours. MyChart has been a good tool for doctor/patient communication, instead of the phone, for non-emergency issues.
Providence Patient
Dr. Ling is a great doctor. I am very happy with him.
Providence Patient
It was extremely valuable to connect with and talk with Dr. Ling over Dr. Attia. Thank you Dr. Ling for heads up about Dr. Attia. Thank you for the conversation about what I'm learning!! You rock.
Providence Patient
Thank for caring
Providence Patient
Very good
Providence Patient
Confirmed meds were in range. Cleared up misconception of some meds. Said we were on track, so need to increase/decrease/change any meds
Providence Patient
Dr Ling and his staff are always compassionate, courteous and professional. I have always had a very positive and comfortable experience and know that I am getting the best care for the condition I am being treated for.
Providence Patient
When I see doctor ling he takes care of all my needs for diabetics and reviews meds etc.he is excellent .
Providence Patient
Dr Ling and Dr Billie Park and Dr Gazania (prostrate dr) are great Doctors. Their nurses and training students are all 1st rate. Respect
Providence Patient
Dr. Ling was very personable, answered all of my questions, didn't argue with me about my feelings or my research techniques, and offered up some new information for me to read about concerning research and my particular condition. I liked him very much and he is very enthusiastic about virtual appointments which I am also. The staff who arranged the appointment was very personable on the phone and helpful!
Providence Patient
Great all around care
Providence Patient
I find Dr. Ling to be professional yet approachable. I appreciate his willingness to listen to my concerns and proceed with treatment that takes into account my concerns.
Providence Patient
Terrific
Providence Patient
First time visit with Dr Ling as previous doctor left. Very impressed with Dr Ling on first visit.
Providence Patient
Easy to talk to and very knowledgeable doctor.
Providence Patient
Dr. Ling is an excellent care provider. He listens to my concerns and explains thoroughly.
Providence Patient
Dr Ling and his team are great to have as my provider
Providence Patient
It's all positive
Providence Patient
Dr. Ling is a caring doctor and thorough. He explains everything very clearly.
Providence Patient
Dr Ling is awesome
Providence Patient
Dr. Lung made some modifications to my healthcare program, and thus far have been very effective.
Providence Patient
The doctor provided good information. He was clear and Informative
Providence Patient
Happy with the care received.
Providence Patient
Caring
Providence Patient
Dr. Ling is a Great Doctor! He is very informative, friendly, and explains things to where I can understand. Answers my questions and has truly been one of the best doctor's I've had in years! As a patient I'm glad I found him and have him as my specialist! The staff at Dr. Ling's office is also very friendly and helpful. It is always a pleasant experience when calling in to schedule or if I have questions.
Providence Patient
Dr. Ling is n excellent specialist. Would very highly recommend him.
Providence Patient
My experiences with Dr Ling have been excellent he has made me feel like a very important patient I'm very blessed to have him as my Dr
Providence Patient
Everything good
Providence Patient
Dr Ling and his staff provided excellent service in a friendly and courteous manner. I have always had a good experience with this office.
Providence Patient
I wasn't seen within 15 minutes of appointment time because I arrived late. The office staff are great and so is The Doctor!
Providence Patient
Competent, respectful and communicative.
Providence Patient
Dr Ling is a very caring physician. He is always on time with his appointments and explains lab results thoroughly!
Providence Patient
I am satisfied, my appointments and referrals a have been within the time allocated, although some were a bit far into the scheduling. It would be nice if our doctors would be better trained at functional medicine, preventative than only symptomatic. There are a lot of things nutritionally that patients can do to alleviate and correct illness besides medicine
Providence Patient
He is a good doctor and I like the whole team too.
Providence Patient
Dr. Ling has always been patient and listened to my concerns, and has offered options for treatment issues. Whenever I had an issue between appointments, I corresponded via My Chart, and he replied within 24 hrs. Very knowledgeable and patient.
Providence Patient
A very very good Doctor.
Providence Patient
Dr Ling was a breath of fresh air, took his time to explain things and was very knowledgeable of my personal medical history.
Providence Patient
Good patient/doctor relationship
Providence Patient
Dr. Ling said we would see me in 6 months, but I was scheduled eight months out, due to his schedule being full.
Providence Patient
Dr Ling is very personable, easy to talk with and zeroes in on the issues. I don't need to see him until next year. Labs and procedure were generally good. I have confidence in Dr Ling's medical understanding of my needs.
Providence Patient
The doctor and staff were "on top" professionals!
Providence Patient
I like Dr Ling very much. I wish I could see my Doctor and not the nurse practitioner.
Providence Patient
Dr Ling is amazing with special needs patients
Providence Patient
Appointments are not easy to come by. All else is good
Providence Patient
Very good visit
Providence Patient
Dr. Ling explained the results of my cholesterol test results which showed Improvement after taking meds I appreciate his taking good care of me. Thank you.
Providence Patient
Good experience
Providence Patient
They are patient with me all the time.
Providence Patient
Met all my needs and is taking excellent care of my medical needs
Providence Patient
Dr. Ling is an excellent provider and is always very thorough in providing care. He is the best.
Providence Patient
I am very satisfied with the care I receive from this provider. The only reason that I didn't rate this provider a "10" that I would recommend this provider is only due to the fact that I rarely recommend providers to anyone,
Providence Patient
Dr. LIng listened! He clarified his answers to my questions! I would definitely recommend him and his staff!
Providence Patient
Dr Ling gets my highest recommendation. He is professional, caring and has treated me with respect and compassion. His staff promptly follows through with his medical direction.
Providence Patient
Dr. Jason Ling is very knowledgeable and careful. He has a very good bedside manner and take care of the patient whole heartedly. He always listen very carefully what the patient has to say and then explained patiently until patient understand. I think Providence should have more physicians like Dr. Jason Ling.
Providence Patient
I felt very comfortable, secure and thankful to have a doctor like Dr. Jason Ling. For me he is the best.
Providence Patient
I really like this provider and group. The downside is that it takes a long time to get an appointment.
Providence Patient
Excellent doctor Thanks
Providence Patient
Good follow up
Providence Patient
Easy to talk to
Providence Patient
They were fabulous thank you
Providence Patient
Dr. Ling is very caring and professional..
Providence Patient
Dr Ling is very knowledgeable and always professional doesn't rush through my appointment offers option and seems to care more than others . I would recommend him and have recommended him
Providence Patient
Good
Providence Patient
All visits very satisfying.
Providence Patient
Dr Ling always shows genuine concern for what is going on with you.
Providence Patient
Good Doctor, very professional
Providence Patient
Dr Ling a is a caring and wonderful specialist!
Providence Patient
Very good
Providence Patient
I appreciate the ease in contacting Dr.Ling's office. If I have a question, I can call directly into his office and reach his assistant. His office has no "barriers' with communication. No call centers or outside interference.
Providence Patient
Dr. Ling is the best! He is very friendly and knowledgeable. He has helped me make good changes in the care of my chronic illness.
Providence Patient
Dr Ling is very knowledgeable in his specialty, takes time to explain things and answer my questions and is an excellent Endocrinologist!
Providence Patient
Fantastic provider! THANKFUL for the excellent care.
Providence Patient
Dr. Ling is very personable and explains things very clearly. After my appointment, I always feel that I've learned something new about my body and how it functions. I appreciate that.
Providence Patient
Very patient, listens carefully to all my concerns. Very comfortable with him.
Providence Patient
The best Doctor
Providence Patient
Dr. Jason ling is one of the best Endocrinologist at St. Jude Heritage Medical group. He takes an interest in your case. He stays on top of your labsFollows through and has a great personality and outstanding communication skills. I highly recommend Dr. Ling
Providence Patient
So far everything is good for me.
Providence Patient
I enjoy discussing my lab results, good or bad with Dr. Ling. He keeps me on schedule for tests I should be getting.
Providence Patient
Dr. Jason Ling is a good caring and professional provider, and I feel fortunate to have him as my doctor.
Providence Patient
He was very pleasant easy-going didn't talk over my head. I am understood him. I like the way he explained everything
Providence Patient
Dr.Ling listens well to the patient. He is knowledgeable and caring. He is a top notch physician!
Providence Patient
I enjoy speaking with my Doctor. He is very attentive to what I tell him and very respectful of my concerns and opinions. He is a joy to visit.
Providence Patient
Always a good visit
Providence Patient
Dr. Ling is very professional and able to recommend better medication for me to try. Thank him so much.
Providence Patient
THE BEST PROVIDER IN TOWN!!!
Providence Patient
Clinical Interests
- Abnormal Cortisol Level Tests
- Abnormal Glucose
- Abnormal Glucose Metabolism
- Addison's Disease
- Adrenal Adenoma
- Adrenal Disorders
- Adrenal Mass Non Malignant
- Adrenal Neoplasm
- Adrenogenital Syndrome
- Androgen Excess
- Androgen Insensitivity
- Calcium Metabolism
- Carcinoid Syndrome
- Congenital Hypothyroidism
- Conn Syndrome
- Cushing Syndrome
- Diabetes Education
- Diabetes Mellitus
- Ectopic Hyperparathyroidism
- Endocrine Disorders
- Feminizing Syndrome
- Fine Needle Aspiration Of Thyroid
- Glucagonoma
- Glucocorticoid Deficiency
- Goiter
- Grave's Disease
- Growth Disorders
- Growth Hormone Abnormalities
- Growth Hormone Deficiency
- Gynecomastia
- Hashimoto Thyroiditis
- Hyperaldosteronism
- Hypercalcemia
- Hypercholesterolemia
- Hyperglycemia
- Hyperglycemic Hyperosmolar Syndrome
- Hyperparathyroidism
- Hyperthyroidism
- Hypocalcemia
- Hypoglycemia
- Hypogonadism
- Hypoparathyroidism
- Hypopituitarism
- Hypothalamic Pituitary Disorder
- Hypothyroidism
- Insulin Pump
- Insulin Resistance
- Insulin Therapy
- Insulinoma
- Low Blood Sugar
- Metabolic Bone Diseases
- Metabolic Syndrome
- Multiple Endocrine Neoplasia
- Myxedema
- Nodular Goiter
- Non Toxic Goiter
- Osteopenia
- Osteoporosis
- Panhypopituitarism
- Parathyroid Disease
- Parathyroid Hyperplasia
- Pheochromocytoma
- Pituitary Adenoma
- Pituitary Disorders
- Pituitary Tumor
- Primary Hyperparathyroidism
- Pseudohermaphroditism
- Pseudohypoparathyroidism
- Radioiodine Therapy
- Rickets
- Secondary Hyperaldosteronism
- Thyroid Cyst
- Thyroid Disorder
- Thyroid Hormone Resistance
- Thyroid Nodule
- Thyroiditis
- Thyrotoxic Exophthalmos
- Thyrotoxicosis
- Toxic Diffuse Goiter
- Toxic Nodular Goiter
- Type 1 Diabetes
- Type 2 Diabetes
- Uremic Hyperparathyroidism
- Virtual Care
- Vitamin Deficiency
Responded to all my questions, very knowlegable and professional.
Providence Patient