Dr. Johannes K. Martensson, MD | Crystal River, FL | Gastroenterologist

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Dr. Johannes Martensson is a gastroenterologist who has dedicated five decades to digestive health care. He earned his medical degree from Linkoepings Universitet Haelsouniversitetet and completed his residency at Greenwich Hospital. With 51 years of clinical experience, Dr. Martensson brings extensive knowledge to the diagnosis and treatment of digestive disorders. He is fluent in both Spanish and English.

Dr. Martensson practices at HCA Florida Citrus Hospital and Tampa General Hospital Crystal River, serving patients in Crystal River, Florida. His expertise includes treating colon polyps, GERD, and acid reflux. He performs colonoscopies and lower GI endoscopies to help diagnose digestive conditions. Dr. Martensson also conducts fecal occult blood tests to screen for potential health concerns. Patients have given him an average rating of 3.8 on Vitals.

Overview based on verified provider data

accepting new patients
3.8

24 Ratings
51 years of experience
speaks Spanish, English
Greenwich Hospital
7 written reviews
1 specialty
10 areas of expertise
1 board certification
2 hospital affiliations
1 office location
Male

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Based on patient feedback. Read the reviews

Dr. Martensson's Ratings and Reviews

3.8

24 Ratings with 7 written Reviews

Average Wait Time 16 Minutes

How was your appointment with
Dr. Martensson?

Patients’ Perspective

Gave an accurate diagnosis: (8) Did WellNeeds Improvement (4)
Had a good bedside manner: (9) Did WellNeeds Improvement (4)
Spent time with me: (9) Did WellNeeds Improvement (4)
Provided follow-up after the visit: (6) Did WellNeeds Improvement (4)
Flexible scheduling: (9) Did WellNeeds Improvement (4)
Saw me in a timely manner: No Ratings
Staff was courteous: No Ratings

24 ratings & reviews

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Showing 1 to 7 of 7 reviews

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Went to Dr Martensson with a pain in my lower abdomen and left lower back. He had me get lab work and CT scan and wanted to do a colonoscopy. I pushed back on colon screen until other test results came back, he was quit upset with this. When he received test results he informed me he saw nothing. So we proceeded with colon screening.Nothing found there. Later I discovered lab test showed blood in my urine and CT scan results were a rather large kidney stone. Dr is a poor excuse for a doctor. Cares about only the money!!!!!!!!!!!

July 24th, 2020

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On my follow up visit after a colonoscopy, Dr. Martensson talked down to me, didn't want to answer my questions, couldn't explain anything to me, was very evasive, gave 4 different reasons why my colonoscopy turned out NOT be a colonoscopy. Claimed I said things I did NOT say, putting words in my mouth! Very rude and abrasive.

April 8th, 2019

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This doctor did an ERCP on me which landed me in the hospital for five(5) days. He never explained one thing to me about my procedure or what was happening to my body. Unfortunately I didn’t listen to my friends telling me not to go to him. I paid the price, I hope you don’t.

September 24th, 2018

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He cares about his patients. He listens , asks questions and explains things so you can understand.

August 27th, 2018

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I was just referred to Dr. Martensson by my primary doctor. I have only seen Dr. Martensson 2 times to date, but feel very fortunate to have found such a knowledge doctor. Mr. Martensson will most likely be referring me to another specialist, but without Dr. Martensson's knowledge the speedy diagnosis wouldn't have happened. I din't answer the question about f/up as I don't have enough experience to do so.

March 31st, 2016

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I Think Dr.Martensson Is A Great Doctor And I Would Refer Him To Anyone....He Is Very Caring And I Can Trust Him With Anything....I Give Him In Ratings 5 Stars....He's The Best.....

September 8th, 2012

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Dr.Martensson Is The Best Doctor I Know He Always Spends Time With His Patients And Explains Things Very Well...I Give Dr.Martensson 5 Stars.....

June 15th, 2012

Citrus Gastroenterology Pa

6152 W Corporate Oaks DrCrystal River, FL 34429

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed


Dr. Johannes Karl Martensson, MD	Jan Seiler, APRN	Brendon Bower, APRN	Whitney Morgan, APRN
Gastroenterology	Gastroenterology	Gastroenterology	Gastroenterology
Accepts New Patients	Accepts New Patients	Accepts New Patients	Accepts New Patients
3.8 (24 Ratings)	0 (0 Ratings)	0 (0 Ratings)	0 (0 Ratings)
51 Years of Experience
No Virtual Visit Option	Virtual Visit Available	Virtual Visit Available	Virtual Visit Available
Speaks Spanish, English	Speaks English	Speaks English	Speaks English
Crystal River , FL	Montgomery , AL	Tempe , AZ	Tallahassee , FL
Med School: Linkoepings Universitet Haelsouniversitetet	Med School: Georgia State University	Med School: University of Cincinnati	Med School: Chamberlain University
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Accepts Medicare
Accepts Medicaid

Gastroenterology

Abdominal Pain
Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Acid Reflux Disease (GERD)
Celiac Disease
Colonoscopy
Constipation
Hemorrhoids
Hepatitis C
Irritable Bowel Syndrome (IBS)
Ulcerative Colitis

MEDICAL LICENSE

Medical Doctor, Florida, 2026, Expired

EDUCATION & TRAINING

Residency

Greenwich Hospital

Medical School

Linkoepings Universitet HaelsouniversitetetGraduated in 1975

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Which hospitals is Dr. Johannes Martensson affiliated with?: Dr. Johannes Martensson is affiliated with Hca Florida Citrus Hospital and Tampa General Hospital Crystal River.
Does Dr. Johannes Martensson accept my insurance?: You can see the insurance plans that Dr. Johannes Martensson accepts on their Vitals profile.
Where is Dr. Johannes Martensson's office located?: Dr. Johannes Martensson's office is located at 6152 W Corporate Oaks Dr, Crystal River, FL, 34429.
How can I make an appointment with Dr. Johannes Martensson?: You can find contact information for Dr. Johannes Martensson here on Vitals.
What languages does Dr. Johannes Martensson speak?: Dr. Johannes Martensson speaks Spanish and English.

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