Christian Gastelum MD | Endocrinologist | Diabetes & Metabolism Specialist | Whittier, CA 90606 | PIH Health
Christian J. Gastelum

Christian J. Gastelum MD


Endocrinology, Diabetes, & Metabolism
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4.7 / 5 (based on 509 Reviews) View 117 Comments
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Office Information

Hospital/Group Affiliation

PIH Health Whittier Hospital

PIH Health Downey Hospital

PIH Health Physicians





Endocrinology, Diabetes, & Metabolism


  • Spanish



White Memorial Medical Center (California)


Charles R Drew Medical Center (California) Cedars-Sinai Medical Center (California)


White Memorial Medical Center (California)

Medical Education

Keck-USC School of Medicine

Board Certifications

Endocrinology, Diabetes & Metabolism (Sub-Spec Cert)

Patient Reviews

October 08, 2021
Dr. Gastelum was very concerned about my, my help. And I would definitely continue being seen by him.Thank you.
October 07, 2021
I appreciated that Doctor was thorough and up to date on the latest studies and treatments.
September 30, 2021
Thank you
September 28, 2021
I'm pleased with my doctor. Just the scheduling is too long and the waiting time on the phone was 20+ minutes. This was an improvement from the previous time.
September 27, 2021
Excellent care and beside manner
September 24, 2021
The doctor was very attentive and explained things very clearly.
September 24, 2021
Dr. Gastelum is knowledgeable and explains everything to me in detail. PIH is lucky to have him as a specialist!
September 23, 2021
Was very kind and informative.
September 21, 2021
Always have good experience with my appointments.
September 20, 2021
Dr G was great and the first doctor to really explain what My body was going through
September 17, 2021
My favorite doctor!
September 13, 2021
September 08, 2021
Each visit is a pleasant experience. I have questions and he answers. He has suggestions and I listen. Diabetes is a difficult disease and it requires team work. Dr. Gastelum is a perfect match for me.
September 02, 2021
I was pleased to receive a phone call the day before my appointment inquiring if I would like to change from an office visit to a tele visit or a zoom visit, This was particularly thoughtful as I am recovering from a full replacement. The appointment was on time and to the point with the next (6 month) checkup documents to be sent to me via US mail.
September 01, 2021
Staff is horrible
August 26, 2021
The ABSOLUTE WORST Hospital wide, OFFICE,TELEPHONE ANSWERING services. Longest wait times, often lack of courteous responding staff. The most exacberating experience to deal with the frustrating response wait times.
August 12, 2021
Staff is always courteous and professional.
July 28, 2021
Everyone from the staff at the front desk, the nurse & the doctor are very caring, courteous and professional. Dr. Gastelum is very thorough, explains everything so you can understand and has excellent bedside manners.
July 22, 2021
Excellent service
July 21, 2021
Listens to any questions or concerns I may have and gives direct answers or solutions that help me understand and work with my diabetes. Due to Dr. Gastélum's interaction, I have lost weight, my diabetes is in better control and I am feeling much better. Dr. Gastélum is a Super Humanitarian who really cares about his patients and their well-being.
July 19, 2021
Dr. Gastelum is amazing and I really appreciate all that he has done for me. But I did have issues with the office changing my appointment time without notifying me and the only way I found out was when I did my online check in the evening before. Disappointing since I'm aware that had things not worked out I would have somehow still been charged for missing even though it was not my fault. Luckily I was able to make it because I was covering the hospital, but had I been taking patients in the office it would not have been as flexible.
July 01, 2021
Doctor G. And staff were very friendly.
June 30, 2021
Dr. Gastelum has,always given me the best care and goes over and above to insure that my referrals to see other Df.x get thru He is the best
June 29, 2021
I had a wonderful experience meeting Dr. Gastelum. He is very knowledgeable and very patient and explains everything in great detail. He spent a great amount of time with me and help me to understand my current situation and how we will address it. I would recommend him to anyone.
June 22, 2021
Dr. Gastelum is always willing to bend backwards and squeeze me in his already busy schedule.
June 21, 2021
Dr. And staff efficient and very courteous.
June 18, 2021
Dr. Gastelum is a very good doctor. He listens to you, he hears what you say and he doesn't make you feel embarrassed or scared. Or worried. I been that way or someone. I hope that it can help other people too.
June 15, 2021
Dr. Gastelum was amazing. It was the best experience that we've had with any doctor. He was patient, explain things and gave us hope when no other doctor did.
June 09, 2021
He was very... very good. I was really impressed. He talked to me, made me understand actually I felt that he gave me more information that my regular primary doctor. So I was really happy that I went to see him.
June 09, 2021
Dr spent time explaining my condition and listened patiently to my concerns...
June 01, 2021
Dr. Gastelum was very knowledgeable and patient.
May 27, 2021
This is my first experience with Dr. Gastelum, but I, I really came away with a very good positive feeling that he really ... knows about ... my Thyroid problem, and how to treat it, he was very knowledgeable and ... I really enjoyed having him for my doctor. Thank you.
May 27, 2021
Everyone was very Professional and Nice.
May 18, 2021
Very good experience
May 18, 2021
Dr Gastelum is the sweetest, very understanding of how the pandemic has affected my treatment plan. Love that he is supportive and willing to make the necessary changes in meds to help me out. Thank you Dr G!
May 13, 2021
Dr Gastelum is always thorough and friendly. He explains things to my understanding and appears to care about my well being.
May 11, 2021
We had a phone visit. It was right on time and doctor didn't rush the call.
May 10, 2021
The doctor was very professional and personable. Explained where are starting point would be and why and what will be determined. An appointment was set up for two weeks which will coincide with the two week testing/monitoring that will be conducted with a patch.
May 10, 2021
Dr. Gastelum is one of the most highly professional medical providers I have had the privilege of having been fortunate enough to have for several years now. He always genuinely cares about all patients, keeps up to date on the latest medical advances to ensure the best care for all who come to him seeking treatment and assistance.
May 07, 2021
Dr. Gastelum and his office space are amazing, very respectful always smiling.
May 07, 2021
Thank you for all that you do.
May 07, 2021
Doctor was very helpful and thorough in explaining my new program to follow.
May 06, 2021
He is one of the best doctors that I have seen.
May 06, 2021
Courteous and very professional very caring understanding compassionate doing always his top best to keeping me in best of health and controlling my diabetes. Thank you Dr. Gastélum
April 29, 2021
Unable to contact providers office directly to change appointment date/time and person I reached was unable to assist me. She told me the providers office team would contact me. My expectation was to be contacted the same day and that did not happen.
April 28, 2021
I love Dr. Gastelum and have recommended him to many of my family members who also love him dearly. He really has taken care of us and he has this way about him where he just knows how to communicate with people. I know he's often in a rush yet he's so kind... he knows how to balance well, it works. The medical dilemma of being too busy and needing to move on is balanced by his kind character and desire to educate you on what's going on. He's a great doctor!!
April 28, 2021
Very Courteous, he explains very well with your problem and follow up. Thanks
April 21, 2021
I consider Dr. Gastelum a very good Dr. I am so thankful for having a Dr. that listens and gives you the best advise to better your health. Dr, Gastelum is an excellent doctor, and I consider myself fortunate to have him as my health provider.
April 20, 2021
I understand needing money and charging for parking but when there is a huge line to get out and elderly people do not understand how to use the machine this creates an unsafe situation. Not able to get out of a parking lot in a timely manner is wrong!
April 13, 2021
Dr. Gastelum was extremely helpful with my medication problem and he watches my blood levels very carefully to make sure I am receiving the correct dosage of the medication.
April 13, 2021
Quickly attended to.
April 02, 2021
Very satisfied. Dr. Gastelum goes out of his way every time!!
April 01, 2021
Dr. Gastelum give us time to give him opinion about how we are feeling and he gave us advice as how we can reach her goals. So he's a very good doctor so. Thank you.
April 01, 2021
Having to pay for parking is really irritating! You should not have to pay for parking. There was a line at the kiosk to pay the parking fee, my hands were full of paperwork and medicine so it was a pain to try and pay.
March 31, 2021
Dr. Gastelum is an excellent physician.
March 29, 2021
Luv Dr Gastelum!!!!!
March 29, 2021
I left feeling a little bit more at ease. I am grateful that Dr. Gastelum listened to me and is doing what he can to help me.
March 26, 2021
Very Professional
March 25, 2021
Dr. Gastelum is a lifesaver. He is an extraordinary doctor. I am very thankful to have him as my specialist. I highly recommend him. He is the bomb.
March 23, 2021
I like a nurse to call me back to confirm that I'm supposed to stop my insulin. The doctor wrote me a note but is handwriting's not the best. I want to be sure I'm supposed to stop my insulin.
March 23, 2021
Excellent care from Dr Gastelum.
March 23, 2021
March 23, 2021
I am 100 percent beyond satisfied with Dr. Gastelum! However, his supporting staff definitely needs some training in their customer service skills! But for me, it's the doctor that is where my concerns have to take priority, and he's worth the trade off!
March 23, 2021
This was a great experience. I look forward to my next visit. Keep up the great work.
March 18, 2021
I have been seeing Dr Gastelum for the past 10+ years in managing my diabetes and would highly recommend him to all those with diabetes!
March 18, 2021
As always, the service was well provided.
March 16, 2021
I have been very satisfied with Dr. Gastelum's office and all of his staff. He is an excellent doctor who is very knowledgeable and is willing to treat more than just my diabetes. I would definitely recommend him to others.
March 15, 2021
Dr Gastelum is the best Dr my son and I have ever had. I hope he never goes anywhere.
March 12, 2021
Dr. Gastelum is the best. I was struggling so much with my thyroid and finally found someone that has been able to help me figure out what is going on with my body and helping me get my body and hormones back in a healthy state
March 12, 2021
Excellent medical provider, attentive to the questions and concerns of his patient, explains in detail and in a simple way the diagnoses and treatment to follow.
March 11, 2021
From Doctor Gastelum to the entire staff all performed in a courteous professional manner.
March 11, 2021
Yes, I feel very comfortable with the doctor and he answered all my questions and even more than that, as far as giving me more information, and yes, I would recommend him. Thank you.
March 11, 2021
Up to date on all diabetic products. Explains easily and in detail how things work. Never in a hurry to push you out. I have complete confidence in working with Dr. G.
March 03, 2021
Dr. Gastelum is great, but his office staff seems very disorganized and does not communicate well.
March 02, 2021
I've been very happy with your CPS young lady that helps me with my feet. Thank you very much.
March 01, 2021
THank you
February 25, 2021
I always have the best experience when visiting Dr. Gastelum's office
February 23, 2021
Always a pleasure dealing with staff and Dr Gastelum. The community is very lucky to have him as a doctor.
February 23, 2021
Explains everything so i could understand and very polite and concerned
February 18, 2021
This doctor listened to my concerns. He listened to my past history and the medications and everything. And took it all into consideration. Spoke to me about how it works and how to take it. And I was happy with him. He listens and he, he answered which is very good. I would definitely recommend him to other people.
February 17, 2021
My issues aren't with Dr. Gastelum, my issues are with his staff. I continuously have problems with prescription refills/renewals. They do not respond to the pharmacy. When I call to inquire they put the responsibility on me and are of no assistance whatsoever. I have had this issue numerous times and it's very frustrating.
February 17, 2021
Dr. Gastelum is very thorough. I trust him 100%!
February 16, 2021
This was my first time with the doctor. I was very impressed with the office with the staff. The doctor gave me the time and attention that I needed. He explained everything. I was very happy and I hope I can continue to see him. Like I said, I was very impressed right from the start very impressed.
February 12, 2021
Thank you for helping me thanks doctors
February 10, 2021
Dr. Gastelum is great.
February 10, 2021
Dr. Gastelum has a wealth of knowledge. I'm grateful he is one of my practitioners.
February 10, 2021
The attention from all of the doctor's offices was very good, at the same time, all very well, all correct.
February 04, 2021
Dr Gastelum is an incredible doctor. I don't agree how PIH treats their employees
February 04, 2021
It was my first appointment with Dr. Gastelum. He was very attentive and we disused my medical concerns. He explained our plan to figure out the issue and what our next stops would be on different scenarios. He made me feel at ease. I was very happy with him and his staff.
February 03, 2021
Always feel well cared for.
February 02, 2021
I feel like Dr. Gastelum really listened to all of my concerns. It's been I've been trying to get my thyroid taken care of for years and everybody just said well, it's close to normal, and there was nothing that could be done and he is taking all the steps necessary to ensure that all of my problems are going to be alleviated I hope and but I for the first time I feel hopeful that I can get something done about the issues that I've been faced with. So, I really appreciate the fact that he listed so well, and he explained everything so thoroughly. Thank you.
January 29, 2021
It took me four days and ten attempts to get into the office. Also some of the information on the portal is incorrect and old. And it's impossible to talk with anyone to fix it. Dr. Gastelum is a fine doctor but the phone system and staff needs improvement. But I find this problem with all PIH facilities.
January 28, 2021
simply the best doctor and staff, would highly recommend. best attention and care, totally listens to you.
January 28, 2021
Excellent doctor.
January 27, 2021
The doctor is excellent. I never had a doctor that explained every little detail to you and compares to the last visit of my blood test. He's always been very good. The staff is always been very excellent. I am so happy to be with this doctor. That's why I never change my insurance because of him and the other doctor that you have on staff. I just want to thank you so much.
January 26, 2021
Was good. No waiting time was seen right away.
January 26, 2021
Really appreciated Gastelum taking the time to review all my lab results with me and discussing not just what is normal but what is optimal given my personal desires and wishes related to my health. I felt heard and understood. I was excited leaving the visit knowing that I had options that no other provider has discussed with me before.
January 26, 2021
Very hard to get in touch with office staff.
January 15, 2021
Hard to get appt in a timely mañner. Dr. Gastelum is excellent.
January 14, 2021
Dr. Gastelum is absolutely great! He listens, he explains, very attentive, understanding and encouraging. I've referred several people to him including one that lives out of state. He's a very good doctor and glad that PIH has him.
January 14, 2021
I think Dr. Gastelum and his crew should be commendation because they do an excellent job. I've never had a problem since I've been going to see him for a few years now. And for sure I have recommended him to other people.
January 13, 2021
Dr. Gastelum is a Magnificent Dr. He is very caring and he's very on the ball and he is extremely intelligent and really looks at things all around I've gotten the best health the best care. I am in so much better condition ever since she started taking care of my medicines.
January 13, 2021
I'm glad to have him as my Doctor.
January 12, 2021
I trust Christian Gastelum with my life. He is the best provider I have ever had. Thank you.
January 12, 2021
Dr. And staff very professional and nice..
January 12, 2021
The physician and staff is the greatest.
January 07, 2021
I still find it a bit strange for portal visits but Dr. Gastelum made it quite easy.
January 07, 2021
Doctor was very knowledgeable about all medical conditions.
December 17, 2020
Excellent doctor, listens and explains very well so you understand what is wrong with your body. He encourages you to diet and take care of your body. Thanks
December 15, 2020
This provider improved my quality of life with diagnosis and treatment
December 08, 2020
Great office, front office staff was efficient and kind.
December 08, 2020
Phone wait time to talk to actual person is typically 40-60 minutes
December 07, 2020
Great doctor
November 23, 2020
I have known Dr. Gastelum for a long time and he has helped me tremendously controlling my diabetes. He always prescribes new medication if there's one out there, and I have been able to do well!
November 19, 2020
Dr Gastelum is outstanding.
November 18, 2020
Make an appointment.
November 05, 2020
Dr. Gastelum is not only a leading expert in his field but is also able to explain complex systems in understandable terms.
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