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“Love all the Doctors and Staff”
“Saved my life!!!”
“A wonderful experience from start to finish.”
“Highly recommend.”
“Professional, friendly, listens to you, and explains what you don’t understand.”
Make, cancel or reschedule appointments Refill request Pay bill Request medical records Set up patient portal
Make, cancel or reschedule appointments Refill request Pay bill Request medical records Set up patient portal
Call Us
Email Us
“Love all the Doctors and Staff”
“Saved my life!!!”
“A wonderful experience from start to finish.”
“Highly recommend.”
“Professional, friendly, listens to you, and explains what you don’t understand.”
Evidence based medicine at its cutting edge.
Evidence based medicine at its cutting edge.
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Due to an increase in volume of calls, we recommend you utilize your patient portal for any needs.

Announcements

🚧 Attention Patients: Heavy Construction Alert 🚧

Please be aware that there is significant construction in the area around our office with no current end date. We recommend allowing extra travel time for your appointments and considering alternative routes.

In the event that you are running late, we greatly appreciate a courtesy phone call to inform us of your delay. However, please note that we cannot guarantee you will be seen upon your arrival. Due to the varying complexity of patient cases, there may be an extended wait, or you may be offered the next available appointment. We kindly ask for your understanding and cooperation in this matter, as we strive to maintain the highest level of care and respect for all our patients and doctors. Thank you.

Announcements

Refills: If you need a prescription refill, please contact your pharmacy and have the pharmacy submit to us a refill request. We will no longer accept or reply to refill requests via phone or portal.

Prior Authorizations: Please be advised that all communication pertaining to a prior authorization must be submitted via patient portal. Phone messages will not be returned.

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“Dr. Guerrero is wonderful! He is very understanding and works with you to get in the best health. He listens and is genuinely caring of his patients concerns.”
“Responsive staff members, great online portal. Convenient location and I’ve been seeing Dr Khowaja for the past 2 years and my experience with him has been outstanding.”
“Excellent service!!! The medical staff was super nice and Dr. Martha was incredibly accurate and knowledgeable, she gave sharp and detailed information, I highly recommend her!!!”
“This is the most efficient, timely, well run, best staffed medical office I have ever been seen at. I’m in and out in 30min, every time. Dr Najera is an incredible doctor I absolutely love him and with his help I’ve lost over a hundred pounds in a year and a half, which has been life changing for me. The staff is so friendly my phone calls are always answered or returned promptly. Other practices it can be like pulling teeth to get prescriptions sent in or refilled but at Northeast Endocrinology I get my medication questions answered and refills called in the same day I inquire about it. I can’t overstate how impressed I am with this establishment and Dr. Najera.”
“I normally do not take the time to give a review but I will for Dr. Guerrero because he does take the time to listen and go over anything that is bothering you. So, if you are looking for a caring, well mannered, informative and 5 Star Personality, make an appointment with Dr. Guerrero. He most likely will give you “homework” but you’ll be better for it. Thanks,”

The best endocrinologist

“Dr Guerrero is awesome! He explains everything well, even draws it out! He’s sweet and very caring. He takes his time explaining the labs and he always answers all my questions without feeling rushed. He’s knowledgeable in his field of study. He has given me a better understanding of my thyroid disease. I highly recommend him.”

“Front office staff are extremely pleasant and always friendly with a smile on their faces.”

“I have been to many different medical offices and this is by far the best. Dr. Guerrero and his staff are truly a step up!”
“Dr. Najera is very easy going and down to earth. He explains things very well! He also also listened and answered any question I had! Happy to be a new pt here!”
“Being a type 1 diabetic with thyroid issues I have seen many endocrinologists in the San Antonio area throughout my years and Dr Guerrero is by far the absolute best. He takes time to go over any and all questions without feeling rushed or judged. He is up to date and knows how to use, fine tune & tweak all the updated diabetic technology & tools so I can use it to my advantage. On top of this, his staff is exceptionally nice and caring. I am thrilled to have finally found a doctor who can care for a disease I have revolved my life around and is there to really help me manage it and be my absolute best. I would recommend Dr Guerrero to anyone in need of an endocrinologist.”
“Dr. Ameer Ali Khowaja has been wonderful! He has gone above and beyond in managing my resolving subacute thyroiditis. On several occasions, he diligently followed up my laboratory test results and adjusted my levothyroxine dosage accordingly. He answered all of my questions and allayed my fear of going off the levothyroxine entirely. He is very dedicated and caring!”
“Dr. Bilbatua and the NE Endocrinology office in San Antonio have been exceptional care givers! Collaborating with Dr. Bilbatua on enhancing my diabetes management has been truly rewarding, and I deeply appreciate her attentive approach. The office staff is consistently friendly and incredibly accommodating. I look forward to continuing as a patient for the long term.”

Best Endocrinologists in South Texas by Far

“There are not enough words to describe the care I had been provided from Dr Omar Najera since 2016. He had under control my Graves’s disease, diabetes and other health issues that have been threatening my life for decades. With his knowledge, professionalism, compassion. dedication, persistent work with pharmaceutical companies, battling health insurance companies to provided me with the right medication every single month for years. His compassion and dedication is not seen in many physician. He is on top of advance and new treatments to provide the best care available for his patients. His attention of every detail while communicating with patients is second to none. His humility, simple way to explain complex medical approaches make him an over the top physician. His manners speaks of how respectful he always treat his patients. My experience as his patients pass way far my expectations. Dr. Najera is the doctor I’m lucky to have. For that and many more…I’m eternally grateful.”
Northeast Endocrinology Associates