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Dr. Gregory Johnson, MD

Gastroenterology* Age 77
Dr. Gregory Johnson, MD
3.7 (20 Ratings)
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Dr. Gregory Johnson, MD is a Gastroenterologist in Thousand Oaks, CA.
Dr. Gregory Johnson, MD
3.7 (20 Ratings)
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Dr. Gregory Johnson, MD

Gastroenterology* Age 77
Thousand Oaks, CA
Accepting new patients
Dr. Gregory Johnson, MD is a Gastroenterologist in Thousand Oaks, CA.

About

Dr. Johnson graduated from Northwestern University Feinberg School of Medicine. Dr. Gregory Johnson, MD is a Gastroenterologist in Thousand Oaks, CA. Dr. Johnson currently practices at Practice and are affiliated with Marian Regional Medical Center and Ventura County Medical Center. At present, Dr. Johnson received an average rating of 3.6/5 from patients and has been reviewed 20 times. Dr. Johnson's office accepts new patients. Dr. Johnson also speaks Spanish. Dr. Johnson is board certified in Gastroenterology and accepts multiple insurance plans.

Experience Check

Enter a condition or procedure
Arterial Blood Gas Test (ABG)
Manometry
Rigid Proctosigmoidoscopy
Arterial Blood Gas Test (ABG)
Manometry
Rigid Proctosigmoidoscopy
Arterial Blood Gas Test (ABG)
Manometry
Rigid Proctosigmoidoscopy
Electrocardiogram (EKG)
Flexible Sigmoidoscopy
Abdominal Pain
Acidosis
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Acute Deep Vein Thrombosis (DVT)
Acute Kidney Infection
Acute Upper Respiratory Infection
Acute Venous Embolism Thrombosis
Administrative Physical
All Headaches (incl. Migraine)
All Types of Food Poisoning
Allergic Rhinitis
Anal or Rectal Pain
Anemia
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Animal Allergies
Anxiety
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Arthritis
Arthritis of the Elbow
Asthma
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Ataxia
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Atherosclerosis
Back Pain
Barrett's Esophagus
Bedsores
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Benign Chronic Pain Syndrome
Benign Neoplasm of the Digestive System
Bladder Infection
Blood in Urine (Hematuria)
Bronchitis
Calcium Metabolism Disorders
Canker Sore
Celiac Disease
Cellulitis
Chest Pain
Chronic Neck Pain
Chronic Pain
Cirrhosis
Cold Sore
Confusion
Constipation
COPD (Chronic Obstructive Pulmonary Disease)
Cough
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Crohn's Disease
Deep Vein Thrombosis (DVT)
Dehydration
Diabetes Type 1
Diabetes Type 2
Diabetes With Renal Manifestations
Diabetic Polyneuropathy
Diaphragmatic and Hiatal Hernia
Diarrhea
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Difficulty With Walking
Diffuse Esophageal Spasm
Dizziness
Duodenal Ulcer
Duodenitis
Dysentery
Dyslipidemia
Dysphagia
E. coli Food Poisoning
Eczema and Contact Dermatitis
Emphysema
Enlarged Prostate (BPH)
Enteritis
Eosinophilic Esophagitis
Esophageal Diverticulum
Esophageal Motility Disorders
Esophageal Ulcer
Esophageal Varices
Esophagitis
Essential Tremor
Fever
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Fibromyalgia
Food Allergy
Gait Abnormality
Gallstones
Gas-Bloat Syndrome
Gastric Ulcer
Gastritis
Gastroesophageal Reflux Disease (GERD)
Gastrointestinal Bleeding
Gastrointestinal Malabsorption
Gastrojejunal Ulcer
Gastroparesis
Giardiasis
Gout
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Headache
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Heart Disease
Hemochromatosis
Hemorrhoids
Hepatitis A
Hepatitis B - Immune Response
Hepatitis C
Hepatorenal Syndrome
Hernia
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Herpes Simplex Infection
Herpes Zoster Without Complication
Hiatal Hernia
Hip Sprain
Human Immunodeficiency Virus (HIV)
Hypercalcemia
Hyperkalemia
Hyperlipidemia
Hypertension
Hypokalemia
Hypotension
Hypotension (Excluding Maternal)
Hypothyroidism
Hypoxemia
Indigestion
Inflammatory Bowel Disease
Influenza (Flu)
Insomnia
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Intestinal Diverticulitis
Intestinal Diverticulosis
Intestinal Obstruction
Iron Metabolism Disorders
Irritable Bowel Syndrome
Ischemic Colitis
Itchy Skin
Joint Pain
Kidney Infection
Leg and Foot Ulcers
Limb Pain
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Liver Damage from Alcohol
Loss of Taste
Low Back Pain
Magnesium Metabolism Disorders
Malaise and Fatigue
Mallory-Weiss Syndrome
Malnutrition
Menstrual Disorders
Mineral Metabolism Disorders
Nausea
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Neoplasm of Gastrointestinal Tract
Neurogenic Bladder
Non-Alcoholic Fatty Liver Disease
Non-Neonatal Jaundice
Noninfectious Gastroenteritis and Colitis
Obesity
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Osteoarthritis
Osteoarthritis of Foot
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteoarthritis of Shoulder
Osteoarthritis of Spine
Osteopenia
Osteoporosis
Overweight
Painful Urination (Dysuria)
Pancreatitis
Peptic Ulcer
Pericardial Disease
Phlebitis and Thrombophlebitis
Phosphorus Metabolism Disorders
Pneumonia
Polymyalgia Rheumatica (PMR)
Polyneuropathy
Polyuria
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Pouchitis
Prostatitis
Proteinuria
Purpura
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Pyloric Stenosis
Radiculopathy
Raynaud's Disease
Reflux Esophagitis
Restless Leg Syndrome
Ringworm
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Sciatica
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Secondary Diabetes Mellitus
Sexually Transmitted Diseases (STDs)
Shingles
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Shortness of Breath
Sinus Bradycardia
Sinus Tachycardia
Sleep Apnea
Sprains and Strains (incl. Muscle Tear)
Stye
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Tapeworm Infection
Tobacco Use Disorder
Tremor
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Ulcerative Colitis
Unexplained Weight Loss
Urinary Hesitancy
Urinary Incontinence
Urinary Stones
Urinary Tract Infection (UTI)
Venous Embolism and Thrombosis
Venous Insufficiency
Vertigo
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Viral Enteritis
Viral Hepatitis
Viral Infection
Vitamin B Deficiency
Vitamin D Deficiency
Vitamin_Deficiency
Vomiting Disorders
Wheezing
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Yeast Infections
Bile Duct Procedure
Colon Cancer Screening
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Colorectal Cancer Screening
Duodenal Polypectomy
Endoscopy
ERCP (Endoscopic Retrograde Cholangiopancreatography)
Fecal Occult Blood Test for Colorectal Cancer
Gallbladder Scan
Hepatitis A Screening
Hepatitis B Virus Screening
Hepatitis C Virus Screening
Hepatitis Screening
Immunization Administration
Impedance Testing
Instrumental Diagnostic Evaluation for Dysphagia
Liver Biopsy
Liver Function Test
pH Probe
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Screening Colonoscopy
Ultrasound, Endoanal
Ultrasound, Esophageal
VAP Lipid Testing
Wireless pH Testing

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Prudent Buyer Individual CA PPO
    Prudent Buyer Small Group CA PPO
    Prudent Buyer Large Group CA PPO
  • Blue Cross CA Anthem High Performance Network
  • Blue Card PPO
    Blue Card High Performance Network HPN
  • Advantage Preferred DirectAccess Plus PPO

Locations

  1. 1 Gregory H Johnson MD Inc
    227 W Janss Rd Ste 215, Thousand Oaks, CA 91360
    Icon Directions Right Arrow Directions Phone Icon (805) 497-9597

Patient Satisfaction

Likelihood to recommend Dr. Johnson
3.7
Based on 20 Reviews
5 Stars (12)
4 Stars (1)
3 Stars (0)
2 Stars (2)
1 Star (5)

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Patient Reviews
Nov 10, 2017
I've had 4 procedures done with Dr Johnson over the last 25 years and you you can't find a more caring doctor. He is straight to the point with information and kind in his delivery of difficult news. He and his office have provided great followup. Insurance issues are causing a lot of doctors to just leave the field, we can't blame them like some of these reviews have. I'm very happy he is still providing care, probably saved my life this month finding a problem early.
Steve in moorpark — Nov 10, 2017
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Photo: Dr. Gregory Johnson, MD
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Dr. Johnson's Office & Staff

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Experience with Dr. Johnson

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  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
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About Me

Languages Spoken
Spanish
Languages Spoken
Specialties*
Gastroenterology
Internal Medicine
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • Northwestern University Feinberg School of Medicine
Medical Education

Board Certifications

Board Certifications
  • Gastroenterology and Internal Medicine
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Fellowship

Fellowship Hospital
  • Los Angeles County - USC Medical Center
    1977
Fellowship Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Johnson communicate via email?
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Does Dr. Johnson offer telehealth services or virtual visits?
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Does Dr. Johnson offer an online patient portal?
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Does Dr. Johnson specialize in working with children or adolescents?
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Gregory Johnson, MD. To arrange an appointment, call the number on Dr. Johnson's profile.

Dr. Gregory Johnson, MD is affiliated with Marian Regional Medical Center and Ventura County Medical Center.

Yes, Dr. Gregory Johnson, MD holds board certification in Gastroenterology and Internal Medicine.

Hospital Affiliations

  • Marian Regional Medical Center

    1400 E Church St, Santa Maria, CA

  • Ventura County Medical Center

    300 Hillmont Ave, Ventura, CA