Jill Olmstead, ANP, MSN
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
St. Jude Heritage Fullerton - Gastroenterology
1837 Sunny Crest Drive, Fullerton, CA 92835
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About Jill Olmstead
As an experienced nurse practitioner in gastroenterology my practice philosophy is to ensure our patients feel comfortable and confident to share their health concerns and questions. It is important to listen to “our patients’ stories” because this is what makes us all unique and gives us the information to help make the diagnosis and develop a plan of care. By understanding our patients needs are the most important reason why we are here, which is the key factor I would like to convey. We often see urgent and complex problems but understanding we have an exceptional team of gastroenterologists to support our patient’s complex needs is key to our success.
My passion is providing gastrointestinal education to our patients so they are well informed and can share in the decision-making process. Once our patients understand the “why” behind the “what next” reduces anxiety and fear. I especially enjoy providing care and guidance for woman’s gastrointestinal disorders. I have found over the past 20 years of my experience in gastroenterology that I am the first clinician my patient has bravely shared a very embarrassing moment. It a very empowering moment for my patients once she realizes she is one of many who share the same GI concerns.
I am a frequent guest lecturer at University of California in Irvine for NP students. I have written and published in the Journal for Nurse Practitioners, Journal of Clinical Outcomes Management, Journal of the American Academy of Nurse Practitioners, Gastroenterology Nursing and The Nurse Practitioner Journal.
In my leisure time, I enjoy being active outside especially kayaking and hiking. I have a renewed passion for cooking and would one day love to write a cookbook to help others “simplify” their desire to eat nutritionally.
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-Red Rose Nursing Excellence Award, St. Joseph Health-2018
-California Nurse Practitioner Distinction of the Year Award, California Association of Nurse Practitioners- 2012
-President American College of Nurse Practitioners, 2012
-President California Association of Nurse Practitioners-2009
-Astra Zeneca Grant Recipient-Developing a NP Directed program Colon Cancer Screening in Underserved Population, American Academy for Nurse Practitioners (AANP) Foundation-2007
-Excellence in Values of Action- St. Joseph Heritage Health Foundation- 2004.
-AstraZeneca Grant Recipient-Gastroesophageal Community Education Grant from the American Academy of Nurse Practitioners Foundation (AANP)-2003
-Nurse’s Service Organization, Advisory Board Member: 2009-present
Alfred University
1982
California State University of Long Beach
1997
American Society for Gastrointestinal Endoscopy, American Association of Nurse Practitioners, California Association of Nurse Practitioners
- American Nurses Credentialing Center, Nurse Practitioner
- American Academy Of Nurse Practitioners, Nurse Practitioner

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.
Jill was very attentive and respectful of my concerns. She listened to me and as a patient, I could sense that she genuinely cared about my needs and concerns. I wish other providers were more like her. She was great and I would gladly see her again.
Providence Patient
I felt Jill listened to me, read my health file, gave me good advice and spent a reasonable time with me.
Providence Patient
Very thourough and professional
Providence Patient
Jill is the best
Providence Patient
Jill Is a wonderful!
Providence Patient
Although I initiated the appointment, I wasn't 100% sure I needed the procedure, Just spent time going over my medical history with me and discussed it And decided I didn't need it.I wish more visits were Like this
Providence Patient
Very knowledgeable about my situation. Friendly and courteous!
Providence Patient
Good
Providence Patient
Excellent
Providence Patient
Overall satisfied. Had to wait 30 minutes to be seen.
Providence Patient
Excellent service
Providence Patient
Jill is amazing, it's always a pleasure to see her. She is very knowledgeable and caring with a great bedside manner
Providence Patient
Felt like I got a rockstar treatment - a wonderful team of healthcare professionals!
Providence Patient
Jill provided a level of care I have never received regarding my GI issues. I left feeling optimistic and grateful for her time.
Providence Patient
Jill always listens to what I say.
Providence Patient
Provider was very attentive and caring to my needs and questions
Providence Patient
Very personable and professional
Providence Patient
First time visit.Wonderful staff and NP.Very respectful and provided information that I required.
Providence Patient
Keep Jill and her staff they're awesome I highly recommend them!
Providence Patient
Jill Olmstead is professional, excellent patient interaction, knowledgeable and emits caring. I appreciate her careful review and advice/guidance!
Providence Patient
Jill is awesome, She is always so friendly, shares about herself professionally, connects easily with me on a personal level, remembers me, listens, and takes immediate action to get me an appointment as soon as possible for a procedure. She orders the tests right away and, If need be, refills my prescription. She is a 10 plus.
Providence Patient
great
Providence Patient
Everyone at the office was nice. Jill listened intently to my comments and provided advice that was easy to understand.
Providence Patient
Jill, put me at ease. She explained what I should and should not do. I very happy with her.
Providence Patient
Excellent provider! Extremely compassionate and knowledgeable.
Providence Patient
My NP was very interested in the progress of my ailment. She's a very caring, empathetic professional with a good sense of humor.
Providence Patient
She took the time to study all my medical history she did not miss anything and I appreciate that and right now away order the tests that needed to be done also scheduling the future procedures to address the problem she is absolutely professional #10 Is not enough thank you!
Providence Patient
Jill Olmstead does a superb gentle Sigmoidoscopy. She is very thorough. She takes her time and the experience could not be better considering the procedure. I specifically ask for her when I do this procedure yearly. Considering I carry two colon cancer genes, I trust Jill to find those pesky polyps which in turn will save my life!
Providence Patient
Jill is an excellent provider. She always makes me feel like I'm talking to a friend. She listens and talks with care and compassion.
Providence Patient
From previous experience I did not think a Nurse practishener could help me. I received more information from Jill today, than I have in 3 years from any medical professional in all of San Bernardino county. I am pleasantly surprised and very relieved.
Providence Patient
Jill is a wonderful listener. She makes me feel very comfortable talking about an uncomfortable subject. She lays out the facts clearly, and makes sure I understand. I am very happy with her help and guidance. She is an outstanding care provider.
Providence Patient
Jill was amazing. One of the best interactions with a medical professional ever. She was welcoming, kind, empathetic. Listened. Made me feel comfortable. Can't give her enough praise.
Providence Patient
I am always very satisfied .
Providence Patient
Jill Olmstead, PA, seemed very interested in me and what I had to say and answered I asked. She was very personable. She's the Best!
Providence Patient
Jill was amazing. My healthcare is a complicated situation and she listened to what I had to say and provided some great recommendations for me and helped me make my procedural appointments before she even left the room. I really felt like she cared about me and it was the first time meeting her.
Providence Patient
Jill Olmsted is easy to talk to and was great also a very nice person and very professional
Providence Patient
Did a great job
Providence Patient
Jill is a very people oriented person & always have fun with her.
Providence Patient
Jill is amazing and always a pleasure to see. I highly recommend her
Providence Patient
Nurse practitioner Jill Orstead is compassionate and treated me with respect. She provided very thorough information on my procedure results and answered all my questions in a manner I could understand.
Providence Patient
Jill Olmstead is an amazing PA for Dr. Yoon! She always gives me her utmost attention and great advice.
Providence Patient
Thank you all the Dr. And all the staff.
Providence Patient
Jill is an amazing healthcare practitioner. She listens and cares. The best!
Providence Patient
Care Provider teams are knowledgeable and courteous.
Providence Patient
Everything is good
Providence Patient
Jill made me feel very comfortable and explained any thing I asked her about.
Providence Patient
Really enjoyed my visit with Jill, Ana, and Becky. All were very nice and professional.
Providence Patient
Caring and good listening and advice.
Providence Patient
The doctor remembered me even after many years away from this facility.
Providence Patient
She listened and asked important questions. She also scheduled an additional procedure she felt was necessary. She is very easy to talk with and made me feel comfortable.
Providence Patient
Jill is the best. Easy to talk to...very understanding and helpful.
Providence Patient
Great experience with nurse Jill
Providence Patient
Excellent care
Providence Patient
Jill is very caring and listened to my needs!
Providence Patient
Love St Jude Providence - get good care!
Providence Patient
Jill was very courteous and knowledgeable
Providence Patient
I appreciate the time the Dr. Took to listen and explain possible treatments and letting me have a voice.
Providence Patient
Jill Olmstead is one of the best providers I have had the good fortune to meet. Shes always prepared, knows my history and listens well. She also gives me excellent advice and guides my care. This last visit, she helped me schedule and appointment when it first appeared there were no timely openings available. She is so fine. Treat her well and keep her! I need her.
Providence Patient
PA Jill Olmstead is wonderful!
Providence Patient
My only complaint was in getting a call back to schedule an appointment. I was extremely happy with Jill Olmstead who was very thorough and spent a great deal of time with me discussing my health issues.
Providence Patient
Jill Olander was friendly, she greeted me with a big smile making me feel less anxious. She was knowledgeable in answering all of my questions. I am very pleased with the care that I received for this initial visit.
Providence Patient
I was very impressed with the amount of time Jill spent with me in the exam room. She was very thorough in reviewing my MR, and answering my questions. Thank you!
Providence Patient
Jill O. Is very knowledgeable and compassionate NP.
Providence Patient
So far very good experience
Providence Patient
Jill Olmstead is a gift to your medical practice. Makes you feel at ease and willing to answer all your questions and if she doesn't hav ethe answer will research or refer.She definitely doe not "rush" you!
Providence Patient
NP Olmstead is a great clinician
Providence Patient
Jill was extremely efficient. Office staff was polite and helpful
Providence Patient
PA Jill Olmstead was professional, concerned and empathetic to my medical needs.
Providence Patient
Jill was very thorough and helpful!
Providence Patient
Just a great experience
Providence Patient
Care is always top notch. Level of care is such that I usually think that I am the only patient the doctor has. Never a rush.
Providence Patient
My experience here has always been amazing. Everyone I have encountered has been great.
Providence Patient
I wish Jill Olmstead could take care of all my healthcare needs. She is amazing.
Providence Patient
I'm glad to have a specialist that's very knowledgeable and is very thorough In hus profession. He even talks to you in a way that you understand. He definitely cares for his patients.
Providence Patient
Kind, listened, thoughtful, not dismissive.
Providence Patient
Everyone was professional and kind. Jill Olmstead is very professional and detailed about the seriousness of my case. Jill took time to explain my next step and showed me written material on-line what I'm dealing with and I may need surgery or hopefully just antibiotics.
Providence Patient
I was highly satisfied with my total experience during my several visits.
Providence Patient
Just a 35 minute wait. Other then that the provider Jill was a pleasure to talk with.
Providence Patient
I couldn't have asked for a more pleasant experience at my appointment today. Everyone from the receptionist, the nurse who checked and recorded my vitals, the sweet nurse who offered to hold my hand, and Jill Olmsted who may possibly be the kindest, knowledgeable nurse I have ever come across. I was so anxious leading up to my sigmoidoscopy, but Jill and the nurses made it anything but. I would highly recommend this office to my loved ones, and am so thankful to Jill and her team!
Providence Patient
Jill was great.
Providence Patient
Enjoyed my 1st visit with Jill Olmstead! Very kind and informative
Providence Patient
Jill Olmstead is an excellent practitioner. She provides important information about GI issues, is very knowledgeable, and kind. She is patient and she remembers from visit to visit what the issues have been, and the recommendations. Dr Yoon is also very good. He is very busy and less available, but is patient and knowledgeable and helpful.
Providence Patient
Jill Olmsted is one of the best caregivers. She listens, asks questions and seems genuinely interested in her patients and their health concerns.
Providence Patient
Jill is such a great listener. Patient. Very friendly. Helps to clarify info. Easy to work with. Makes me feel comfortable talking about a sensitive topic
Providence Patient
Good
Providence Patient
NP Jill was so very good, excellent! She knew exactly how to help me and was so very kind!!
Providence Patient
Jill Olmstead was very thorough and we discussed my situation and concerns and what the possibilities might be and the course of action. She also told me twice to let her know of any changes that I might experience.
Providence Patient
Jill was great! I think the receptionist area could be friendlier.
Providence Patient
I am very with my medical doctors. Only ER hospital at st jude could improve , on waiting time!!!
Providence Patient
The provider I saw today was exceptional!!
Providence Patient
I felt she was very personable, showed interest in a dialogue rather than just giving information/instructions.
Providence Patient
Jill is very knowledgeable and a obvious professional.
Providence Patient
Jill was amazing !she listen to my concerns checked my medical records, I wished all my providers would show me the same concern about my condition, I feel confident that now I will get some answers, She is amazing!!
Providence Patient
I was happy she had all my info ready on my visit
Providence Patient
Jill Olmsted is the best
Providence Patient
I am happy with this provider. Even though I know the PA's and NP's are fully capable of administering any required care, tests and/or medications and I appreciate being able to see them, the only reason I gave a 9 instead of a 10 is because it is not the actual doctor. I realize that without them, appointments would be very difficult to obtain. They are appreciated.
Providence Patient
Jill was excellent at answering the many questions I had as to how best to deal with my IBS. She was wonderful at explaining things and gave me great information as to how to improve my diet.
Providence Patient
Outstanding meeting. Olmsted is knowledgeable, communicates extremely well, was thorough and took time to hear my concerns and provide guidance. I only wish other providers were more like her.
Providence Patient
Excellent doctor, informative, professional and easy to talk to, I really liked her!
Providence Patient
Jill listened and answered my questions and was very thorough in ordering diagnostic tests and referrals.
Providence Patient
Wonderful care provided! Could not ask for better
Providence Patient
I was very satisfied with the care and treatment I received. It could not have been better. Thank you all.
Providence Patient
Jill O very knowledgeable, compassionate and caring.
Providence Patient
Excellent experience! Great customer service and Jill was perfect!
Providence Patient
Clinical Interests
- Abdominal Pain
- Abnormal Bowel Movement
- Abnormal Liver Function Blood Test
- Abnormal Stool
- Achalasia
- Acute Pancreatitis
- Alcoholic Hepatitis
- Altered Bowel Habits
- Anemia
- Anorexia
- Autoimmune Enteropathy
- Autoimmune Hepatitis
- Barrett's Esophagus
- Benign Neoplasm Of Colon
- Biliary Tract Disease
- Blood In Stool
- Bravo Ph Test
- Breath Testing
- Bright Red Blood Per Rectum
- Burping
- Capsule Endoscopy
- Celiac Disease
- Cholangioscopy
- Cholangitis
- Cholecystitis
- Cholelithiasis
- Cholestasis
- Chronic Abdominal Pain
- Chronic Diarrhea
- Chronic Pancreatitis
- Cirrhosis
- Clostridium Difficile
- Clostridium Infections
- Cold Therapies
- Colitis
- Colon Polypectomy
- Colonic Inertia
- Colonic Polyps
- Colonoscopy
- Colorectal Screening
- Constipation
- Crigler Najjar Syndrome
- Cyclic Vomiting Syndrome
- Digestive Disorders
- Diverticular Disease
- Diverticulitis
- Diverticulosis
- Double Balloon Enteroscopy
- Duodenal Ulcer
- Duodenitis
- Dyspepsia
- Dysphagia
- End Stage Liver Disease
- Endoscopic Mucosal Resection
- Endoscopic Mucosal Resection Of Esophagus
- Endoscopic Mucosal Resection Of Large Colon Polyps
- Endoscopic Retrograde Cholangiopancreatography
- Endoscopic Ultrasound
- Endoscopy
- Eosinophilic Colitis
- Eosinophilic Enteritis
- Eosinophilic Esophagitis
- Eosinophilic Gastritis
- Epigastric Pain
- Eructation
- Esophageal Disease
- Esophageal Disorder
- Esophageal Diverticulum
- Esophageal Mass
- Esophageal Motility Disorders
- Esophageal Spasm
- Esophageal Stricture
- Esophageal Ulcer
- Esophageal Varices
- Esophagitis
- Fatty Liver
- Fecal Impaction
- Fecal Incontinence
- Feeding Tube Management
- Flatulence
- Focal Nodular Hyperplasia
- Gallbladder Disease
- Gallbladder Polyp
- Gastric Anomaly
- Gastric Ulcer
- Gastritis
- Gastroenteritis
- Gastroesophageal Reflux Disease
- Gastroesophageal Reflux Surgery
- Gastrointestinal (Gi) Cancer Screening
- Gastrointestinal Amyloid
- Gastrointestinal Bleeding
- Gastroparesis
- Gastroscopy
- Gastrostomy Closure Surgery
- Giardiasis
- Gluten Sensitivity
- Helicobacter Pylori
- Hematemesis
- Hematochezia
- Hemochromatosis
- Hepatitis
- Hepatitis B
- Hepatitis C
- Hereditary Colon Cancer
- Hiatal Hernia
- High Resolution Manometry
- Ileitis
- Inflammatory Bowel Disease
- Intestinal Obstruction
- Intractable Vomiting
- Irritable Bowel Syndrome
- Jaundice
- Lactose Intolerance
- Liver Disease
- Liver Mass
- Lynch Syndrome
- Malabsorption
- Melena
- Motility Disorders
- Nausea
- Non Alcoholic Fatty Liver Disease
- Non Alcoholic Steatohepatitis
- Obstipation
- Odynophagia
- Ogilvie Syndrome
- Pancreas Divisum
- Pancreatic Cyst
- Pancreatic Fistula
- Pancreatic Insufficiency
- Pancreatic Pseudocyst
- Pancreatic Steatorrhoea
- Pancreaticobiliary Disease
- Pancreatitis
- Paralytic Ileus
- Partial Small Bowel Obstruction (Sbo)
- Peptic Ulcer
- Peritonitis
- Peutz Jeghers Syndrome
- Polyposis Syndrome
- Portal Hypertension
- Portal Hypertensive Gastropathy
- Postprandial Diarrhea
- Primary Encopresis
- Proctitis
- Proctosigmoidoscopy
- Radiofrequency Ablation For Barrett's Esophagus
- Rectal Bleeding
- Rectal Pain
- Regional Enteritis
- Secondary Encopresis
- Short Bowel Syndrome
- Sigmoidoscopy
- Small Bowel Disease
- Stomach Cramps
- Stomach Disorders
- Swallowing Problem
- Ulcerative Colitis
- Virtual Care
- Vomiting
- Whipple's Disease
- Wilson's Disease
I feel confident in my provider for my condition and the path she's given me.
Providence Patient