Laurence Katznelson, MD received his medical degree from the University of California, Los Angeles and performed his internship and residency in Internal Medicine at the Hospital of the University of Pennsylvania, Philadelphia. He then performed a fellowship in Endocrinology and Metabolism at the Massachusetts General Hospital, Boston. Dr. Katznelson is a Professor of Neurosurgery and Medicine (Endocrinology)at Stanford University School of Medicine. At Stanford University, he is the Associate Dean of Graduate Medical Education and the Chair of the GME Committee. Dr. Katznelson is the Medical Director of the Pituitary Center at Stanford Hospital and Clinics. He is the medical director of the Pituitary Stanford, Stanford HealthCare. In endocrinology, Dr. Katznelson has a long standing clinical and research interest in the pathophysiology and treatment of pituitary disease.

Professional Summary

Education & Certifications
  • Board Certification: American Board of Internal Medicine, Endocrinology, Diabetes and Metabolism (2013)
  • BS, U.C., Berkeley, Genetics (1981)
  • MD, UC, Los Angeles, Medicine (1985)
  • Internship: Hospital of the University of Pennsylvania (1986) PA
  • Residency: Hospital of the University of Pennsylvania (1989) PA
  • Fellowship, Massachusetts General Hospital, MA, Endocrinology and Metabolism` (1992)
  • Board Certification: American Board of Internal Medicine, Internal Medicine (1988)
  • Board Certification, Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine (2013)

Awards & Memberships
  • 2017 Laureate Award for Educator of the Year, The Endocrine Society (2017)
  • Best Doctors in America, Best Doctors (2005-)
  • H. Jack Baskin, MD, Endocrine Teaching Award, American Association of Clinical Endocrinologists (2015)

Administrative Appointments
  • Associate Dean of Graduate Medical Education, Stanford School of Medicine (2014 - Present)
  • Chair, Graduate Medical Education Committee, Stanford Healthcare (2014 - Present)
  • Chair, Special Programs Committee, Endocrine Society (2008 - 2011)
  • Director, Endocrinology Fellowship Training Program, Stanford Healthcare (2005 - 2014)
  • Medical Director, Pituitary Center, Stanford Healthcare (2004 - Present)


Practice Locations

Pituitary Center Palo Alto, CA
Palo Alto, CA

Stanford Neuroscience Health Center Palo Alto, CA
Palo Alto, CA

213 Quarry Road

Palo Alto , CA 94304

(650) 723-6469

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Patient Ratings

(42 Ratings)

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The Patients Ratings and comments are gathered from our Patient Satisfaction Survey and displayed in their entirety.

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Patient Reviews

(177 reviews)

He is a great physician
I am greatly appreciative of Dr. Katznelson's expertise and care.
very good doctor who seems to genuinely care about the health and welfare of his patients.
Intelligent, knowledgeable
He is very knowledgeable and competent. I trust his judgment regarding healthcare decisions.
Excellent doctor, asks questions, and listens
He’s awesome!
Great Doctor with excellent people skills. Always makes me feel at ease.
Always very understanding. And it’s very obvious. He cares and wants to help you.
I am extremely lucky to have Dr. Katz Nelson as a caregiver.
Extremely helpful, he explained concepts and the “why†of things very well. He was also extremely kind and listened intently to anything I had to say.
I am very happy and please with his attention and care for my health and not only him but his team , I trust him very much
Dr. Katznelson provided everything I needed to know about my issues. He took the time to explain many questions we had. I appreciate that he took extra time to coverall our questions.
He is professional, knowledgeable, thorough, and caring. I have total confidence in his abilities. I am grateful to have him as my doctor for endocrinology.
I felt that my concerns were addressed with care and thoughtfulness.
Dr. Katz Nelson shows care and compassion each time I meet with him. He listens and gives thoughtful advice and answers..
Excellent knowledge and attitude, professional and dedicated to the care of his patients! Thank you for caring!
Really cares
Great Doctor
I am grateful for Dr. Katznelson; he is the first physician to ask the right questions about my health and really recommend possible solutions to give me a quality of life I was missing...
Great doctor
Very informative.
Excellent doctor!! Excellent bedside manner and patient care! I have thoroughly enjoyed continuity of care with him and Oliva, NP. Thank You!! :)
Excellent service compassionate and caring and took his time for appointment
Very efficient and helpful. thank you.
Dr. Katznelson is top notch in every way. He has been extremely helpful to me. He listens carefully, shows genuine interest and inspires confidence in a positive outcome.
He was sensitive and compassionate.
Dr Katznelson took time to answer all my questions. He has a good "bedside manner" and sense of humor.
Dr. Katznelson is a great doctor to talk with. He is personable and kind.
He is the best
I like Dr. Katznelson. He is very detailed, answers questions clearly. He is very pleasant to interact with.
Excellent provider who’s cared for me over the years. Has a human touch- genuine care!
I lov Dr Katznelson and his team! So efficient yet personable.
Very personable and knowledgeable and took the time to explain in lay man’s terms the issue we are dealing with. I didn’t feel rushed and he was most helpful in assuring me about my situation. Super satisfied……wonderful Dr. AAA+ rating / 5 star
Very informative and communicates well
I felt the appointment went well. He understood my concerns and addressed them. I feel confident in the care he provided.
He is very knowledgeable and professional. I appreciated that he was thorough and took time to answer all of my questions. I really like that he adds his comments to lab test results so that I know he read them and I can see what actions, if any, I need to take.
Excellent Dr. I have full confidence that he is doing the right thing for me, thank you
The was very caring and helpful
Very thoughtful and capable. Looking forward to my next in person appointment.
As good as they get.
Wonderful provider. Thoughtful, caring and understanding
Superb professional
Thank you for being so understanding. And for agreeing that I am OK to go forth with directions to get off the hydrocortisone. I appreciate it. Thank you for taking time via video with me.
Fantastic doctor
Best doctor I have ever worked with. Wonderful person with great bed side manners.
Stanford has the best trained doctors I have ever met I consider Stanford doctors the best trained and knowledgeable doctors in the world very considerante and caring! DR Laurencee Katznelson ,MD is very professional and knowledgeable in his line of work along with his associate! Oliva Sye-Ying Chu, NP, They were both outstanding!!!
He is very caring and helpful. Easy to talk to.
Dr. Katznelson provides world class care
Es un exelente hospital y la atención es perfecta
He’s a genius. Best doctor there is anyplace
Dr Katznelson and Olivia are the best. I couldn’t get better care than I do from them. They listen to my concerns and make me feel like they care. They are very thorough and I know they are doing all they can to help me. Thank you Dr. Katznelson and Olivia.
He is very knowledgeable and patient. He also has a sense of humor.
Dr Katznelson and Olivia Chu are the best in the field. I could not ask for better care and I give credit to them for my ability to be able to be who I am and do the things I do every day. Not everyone is as fortunate as I am. for most their biggest accomplishment every day is getting out of bed. I wish everyone had access to such awesome doctors or should I say I wish all doctors were as awesome, knowledgeable, and caring as Dr Katznelson and Olivia Chu. The world would definitely be a better place.
I have a very complex and rare disease hence I switched to Stanford to receive care. I wanted to be proactive as my levels are getting more abnormal and to discuss possibilities. I came out from that appointment feeling most of my questions unaswered.
He’s a great doctor. Very knowledgeable, very personable; it’s clear he has the best interests of his patients as top priority. Thanks!
Pleasant, informative, patient, knowledgeable, very happy to have seen him.
Extremely efficient, friendly and organized. Truly impressed.
Accessible, caring, knowledgeable, patient.
Dr Katznelson is the best doctor I ever had. He is both super competent and trustworthy and also always respectful and nice.
I always appreciate Dr. Katznelson's genuine interest and his happy demeanor, as well of course as his excellent medical care.
Dr. Katznelson has been a wonderful, thoughtful doctor who has treated me with great care over the many years I've seen him. His NP, Olivia, has also been great to work with. She has been extremely helpful during and in between visits.
Dr Katznelson listens and understands my condition. I feel confident in my medical plan under his care
Great physician.
Everything excellent
Dr. Katznelson has always been very patient with me and my family and I am sure that if he were not my doctor I would not feel so healthy:
He is a compassionate and caring doctor who provides excellent medical care for my husband.
Excelente Doctor i do not have any complaints
Dr Katznelson is #1 in great support for me as a patient for 10 years
He has been helpful with facilitating my care plan with my local endocrinologist.
Great Doctor. Highly recommend.
He's the best! Extremely knowledgeable and he explains things thoroughly, making sure you understand. Never feels rushed, and I never feel uncomfortable/stupid asking questions. He also has a sense of humor, which is greatly appreciated! I feel the same way about his NP, Olivia.
Dr. Kaz Nelson is always extremely friendly and makes me feel heard. He listens to concerns and take them seriously. I feel very safe and I feel like I have a doctor that cares and really wants me to feel better.
Intelligent, articulate and a great strategist.
I feel incredibly lucky to have the privilege to work with Dr. Katznelson. In addition to being on the cutting edge of his field, he is very warm and caring.
Dr Katnelson is wonderful.
Awesome Dr. & human being.
He is an excellent practitioner! Extremely knowledgable, approachable, shares information and is willing to engage in discussions of my health concerns... and to work collaboratively with me to improve my health and quality of life Highly recommend him!
Dr Katz nelson is a personable knowledgeable caring doctor
He is a nice, and very knowledge doctor. always has patience, and care for patients.
Dr. Katnelson is the best. He is very friendly, listens and we have the utmost confidence in what he says/does is best for the patient.
Thank you for taking the time to meet with me.
Caring with great bedside manners.
You’re awesome
Dr. Katznelson was very paience to listen to my issues and he has been a very caring and supportive doctor in my life. I also wanted to give thanks to Olivia Chu, NP who has been a great help to update my medicine, medical condition as well as blood draw request etc. Thank you very much.
He is the best
Every thing was fine.
Both the doctor and NP were engaged, listened well, and left me feeling they really cared.
NP and dr. among the finest people and care providers I've ever met (and I've met a great many).
Dr. Katznelson is an outstanding dr.
Doc Katznelson and staff are wonderful especially his PA Olivia. She always gets right back to me and gets thing taken care of right AWAY.
Item 10 many times.
I felt uncomfortable about our communication. I did not feel that my concerns were addressed or HEARD. I felt that the doctor had a preconceived agenda and was pushy, rather than helping me to have all the information to take the lead in determining my best course of action, aligned with my values & beliefs.
Is there another doctor as GREAT as Dr. Katznelson... NEVER.
Dr. K - great as always!
I would absolutely recommend Dr. Katznelson. He is a great dr./person and so is Olivia Chu.
I am delighted with Dr. Katznelson and his team-
I am glad Dr. Katznelson accepted me as a new patient. The doctor and physician assistant answered my questions and concerns very patiently during my first visit to the clinic.
Always tell my clients the great experiences I have, during all my appts. & surgery.
Dr. Katznelson is one of the best physicians I have ever worked with ever.
Yes all professional.
Olivia CH-NP & Dr. Katznelson make an excellent partnership & their years together is evident & optimal in care provided.
Always a good visit, well informed both by the doctor & PA. 1. Oliva is wonderful.
Dr. Katznelson has treated me since 2013 - every visit with him has left me feeling (and knowing) that I am receiving the best and highest level of care possible. I am honored and grateful to be his patient.
Dr. Katznelson noticed a change in my weight as a positive outcome to my surgery. He has always showed so much concern with me. I owe him my life. Thank you.
Dr. Katznelson does an outstanding job of putting one at ease and has outstanding communication skills. I feel blessed he is my physician.
Dr. Katznelson is exceptional doctor.
Wish Dr. Katznelson could be rated MORE THAN 5! He is an incredible physician, and friend as well -
Dr. Katznelson is very thorough!
I am so thankful for Dr. Katznelson and his entire team! What an amazing staff!
For me, he's the best doctor at Stanford. A real detective. I was spared surgery because of his expertise & thoroughness.
Dr. Katznelson is an excellent doctor who is caring and very helpful.
He was excellent!
The doctor verbalized my next visit, my next step. The doctor briefly summarized that's next and listened. The nurse didn't nor did she need to.
Dr. Katznelsonis one of the most outstanding care givers with whom I have had experience. His knowledge, patience and perseverance have helped me immeasurably!
Very very good and more than excellent thanks.
Excellent care and support.
Dr. Katznelson goes above and beyond.
Dr Katznelson spent 30+ mins with me.
Dr. Katznelson was great! Knowledgeable & caring.
Doctor Katznelson and his team are awesome. I owe my good health to him & Olivia Chu. I am forever grateful for their care and time they take to help me.
Dr. Katznelson is an excellent doctor. He is an excellent listener and really cares about how my husband (the patient) is doing. He is compassionate.
I wanted to get a second opinion regarding my treatment plan from a non-Stanford doctor. After my experience with Dr. Katznelson, I feel confident in transferring my care to him.
Dr. Katznelson is awesome! & Olivia too.
As always- great care all around. Like family!!
The care provider called me the next day just to follow up on the information given to me and make sure I was able to get the medication an if I had any questions about the meds.
I've realized I have to do my homework so I know what to ask. Knowledge is not forthcoming automatically. Lab work was recommended at visit. No one followed thru.
All good.
Dr. Laurence Katznelson is everything a patient would want in a doctor. He is extremely knowledgeable, and he genuinely cares about providing.
Dr. Katznelson and his staff are all wonderful! They're so wonderful, that I drive 3 hours just to see them... when needed!
I tell people that Stanford is only place to get care.
have already sung your praises to friends
Very good!
Love my doctors!
Dr. Katznelson is an excellent doctor who has helped my husband a lot. His nurse, Olivia Chu, is also very helpful.
The dr. is amazing!
Dr. Katz-Nelson is the very best. I wish he were my regular internist for my total health situation.
Dr. Katznelson is an outstanding physician. He is an excellent communicator and extraordinarily kind and compassionate.
Stanford Hospital should be proud to have such a awesome doctor and team treating patients.
The NP actually called me to go over results of lab work and explained everything in terms I could understand. I appreciated it very much.
Great experience.
Spent 45 mins!!
Doctor Laurence Katznelson and NP Olivia Chu area great in their patient care and explanations!
He is an excellent doctor who REALLY cares. He has helped my husband tremendously.
We love Dr. Katznelson he is awesome!
Overall very good.
Kindness and cleanliness. Excellent.
Very comfortable atmosphere.
I am very happy with the staff, and hospital. I am in the best of hands.
The experience was very good attention and amiable from all personnel thank you very much.
I like that the MD has a consistent (same NP) & not a high turnover - important for continuity of care.
Felt my visit this time was very rushed. Usually it is better.
Wish I lived closer so I could see him again! Great assistants as well!
I had a very good experience with Dr. Katznelson. Knowledgeable, easy to talk to, patient. Very impressed.
Excellent experience.
Dr. Katznelson epitomizes why Stanford is so highly regarded.
The PA or resident on the case was very thorough and spent a lot of time w/me. Good experience.
Dr. K makes me feel special and he's like family & we've gone through so much together. I am alive because of him!
Best doc - spent 45 minutes. Great bedside manner. Dream doctor.
Dr. Katz and Olivia his PA are an excellent caring team.
Dr. Katznelson has the greatest patient-doctor rapport that I know of.
Very friendly love them.
Dr. Katznelson is an amazing, empathetic physician!!! We need to clone him.
Dr. Katz is an awesome dr. He is very caring -
Fellow was great to deal with listened very carefully. Physician was well informed by fellow - also caring.
I found this care provider awesome. He was able to point out things from an old MRI not told before.
Dr. Katznelson & Olivia Chu are great. Enjoy talking with him & her.
I was sent to Dr. K. by referral. A very stressful time due to my diagnosis, and all the staff was great!
Dr. Katz-Nelson is exemplary in every way!! Extraordinary.
How rare to find a dr. who admits "I'm not sure" and explains steps to be taken together to find an answer. Refreshing and inspiring.

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