About me
Katherine (Katie) Johnson, DNP, FNP-C, is a nationally certified and doctorally prepared nurse practitioner with MedStar Health Gastroenterology at St. Mary’s Hospital. She specializes in gastroenterology and works in collaboration with MedStar Health’s board-certified gastroenterology physicians.
Dr. Johnson is skilled in diagnosing and treating a wide variety of gastroenterology conditions, including gastroesophageal reflux disease, H. pylori, small intestinal bacterial overgrowth, esophagitis, peptic ulcer disease, gastritis, irritable bowel disorders, pancreaticobiliary disorders, colitis, ulcerative colitis, and Crohn’s disease. She is also deeply passionate about preventative screenings and often conducts pre-procedure visits for colorectal cancer screenings. Her comprehensive approach to care includes lifestyle modifications such as diet and exercise, medication management, and other therapeutic interventions.
Dr. Johnson was born and raised in St. Mary’s County. She attended Towson University to obtain a Bachelor of Science in Nursing. After her undergraduate studies she worked as a registered nurse at The Johns Hopkins Hospital for nine years specializing in medical surgical oncology (gastroenterology and otolaryngology malignancies) and radiation oncology. She then attended Johns Hopkins University to obtain a Doctor of Nursing Practice and worked in family medicine as a primary care nurse practitioner in Annapolis, MD, while completing a primary care fellowship through Johns Hopkins University School of Nursing. She is happy to be back in St. Mary’s County serving the community that raised her.
“My philosophy of care is patient centered. I believe everyone deserves to feel comfortable, listened to, and respected while receiving health care. I want my patients to feel empowered to ask questions and be understood and well informed. I am passionate about patient education and am honored to work with my patients to help them feel their best and reach their goals.”
Clinical areas of focus
- Abdominal Pain
- Digestive System Symptoms
- Gallstones
- Gastritis
- Hemorrhoids
Conditions and procedures
Conditions I treat
- Abdominal Pain
- Abnormal Stool
- Achalasia
- Acute Pancreatitis
- Alimentary Tract Foreign Body
- Anus And Rectum Diseases
- Aphagia And Dysphagia
- Barrett's Esophagus
- Benign Neoplasm Of Colon, Rectum, Anus And Anal Canal
- Benign Neoplasm Of Digestive System
- Bile Duct Stones
- Blood In Stool
- Bowel Obstruction
- Chronic Constipation
- Chronic Diarrhea
- Colitis
- Colon Cancer
- Colon Polyps
- Congenital Malformations Of Digestive System
- Crohn's Disease
- Crohn's Disease [Regional Enteritis]
- Diaphragmatic Hernia
- Digestive System Complications
- Digestive System Diseases
- Digestive System Symptoms
- Diseases Of Esophagus
- Diseases Of Stomach And Duodenum
- Diverticulitis
- Duodenal Ulcer
- Duodenitis
- Dysphagia
- Epigastric Pain
- Esophageal Cancer
- Esophageal Stricture
- Esophagitis
- Flatulence
- Functional Dyspepsia
- Functional Intestinal Disorders
- Gallbladder Disease
- Gallstones
- Gastric Cancer
- Gastritis
- Gastrointestinal Bleeding
- Helicobacter Pylori
- Hemorrhoids
- Hepatitis C
- Hepatomegaly
- Hepatomegaly And Splenomegaly
- Jaundice
- Liver Cirrhosis
- Liver Failure
- Liver Fibrosis
- Malabsorption
- Melena
- Nausea
- Noninfective Gastroenteritis
- Pancreatitis
- Paralytic Ileus And Intestinal Obstruction
- Peptic Ulcer Disease
- Perianal Fistula
- Portal Hypertension
- Postprandial Diarrhea
- Primary Sclerosing Cholangitis
- Proctitis
- Rectal Cancer
- Rectal Pain
- Regional Enteritis
- Small Intestine Cancer
- Stomach Cancer
- Stomach Cramps
- Stomach Ulcers
- Ulcerative Colitis
- Viral Hepatitis
- Vomiting
Procedures I perform
- Capsule Endoscopy
- Celiac Disease Treatment
- Colonoscopy Through Stoma
- Colonoscopy With Biopsy
- Diarrhea Treatment
- Dilation Of Esophagus
- Endoscopic Mucosal Resection
- Endoscopic Retrograde Cholangiopancreatography
- Endoscopic Retrograde Cholangiopancreatography (ERCP)
- Endoscopic Submucosal Dissection
- Enteroscopy
- Esophageal Dilation
- Esophageal PH Monitoring
- Esophagogastroduodenoscopy With Biopsy
- Fecal Microbiota Transplant
- Fecal Transplant
- Flexible Colonoscopy With Biopsy
- Gastrointestinal Biopsy
- Gastrointestinal Foreign Body Removal
- Gastrointestinal Motility Study
- Gastrostomy
- Hydrogen Breath Test
- Intestinal Biopsy
- Irritable Bowel Syndrome Treatment
- Lactose Breath Test
- Lactose Intolerance Testing
- Lower Gi Endoscopy
- Pancreatitis Treatment
- PH Monitoring
- Rectal Biopsy
- Retrograde Cholangiopancreatography
- Sigmoidoscopy With Biopsy
- Stomach Pain Treatment
- Swallowing Disorder Treatment
- Upper Endoscopy
- Upper Gi Endoscopy
Insurance
MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.
-
List of insurance plans we accept
- Coventry of Delaware HMO/PPO
- Anthem Federal Employee Program Standard
- Medicare Direct
- Kaiser Permanente Flexible Choice POS Cardiac Global
- Kaiser Permanente Flexible Choice 3-tier POS
- TRICARE East Select
- Aetna Premier 200PD
- AmeriHealth Caritas DC Healthy Families
- IH-POS Plus
- Anthem BCBS of VA HealthKeepers Plus
- IH-PPO
- CareFirst Blue Preferred PPO
- Select HMO/HealthFund/Health Network
- Cigna Preferred Medicare (HMO)
- Medicare Advantage - Advantra Value (PPO)
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- HighMark
- Anthem BCBS Medi Blue Plus
- Kaiser Permanente Select Cardiac Global
- HealthyBlue PPO
- Aetna Open Choice (PPO)
- Kaiser Permanente Medicare Advantage Signature and Select
- Kaiser Permanente HMO Plus and DHMO Plus Member
- Anthem BCBS Medi Blue Dual Adv
- CIGNA POS/Network POS
- Choice POS
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- Aetna Better Health of MD
- CareFirst NASCO
- Medicare FFS
- Advantra Platinum (PPO)
- OA Plus
- Choice POS II Open Access
- IH-Open HMO Option
- United Healthcare Choice Plus
- Erickson Advantage Plans
- Uniformed Services Family Health Plan
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Choice POS II
- IH-Open EPO Plus
- First Health PPO
- Magellan Complete Care of VA - VA Medicaid MCO
- Navigate
- Great-West Healthcare POS/CIGNA
- UHC Passport
- BlueChoice Open Access
- IH-POS
- CareFirst MedStar PPO
- HumanaChoice Honor's plan PPO
- CareFirst Group Medicare Advantage
- United Healthcare Select Plus (POS)
- CIGNA PPO Plus
- Anthem Federal Employee Program Basic
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- United Healthcare Choice
- United Healthcare Community Plan - VA Medicaid MCO
- CareFirst Maryland Indemnity or PPO
- MedStar Family Choice DC Healthy Families
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- OCI Direct (HMO)
- Geisinger Medicare Advantage
- United HealthCare Community Plan - Maryland Health Choice Program
- Aetna HMO
- IH-Indemnity
- CIGNA SureFit (HMO)
- Aetna Classic 5000PD
- Humana Gold Plus HMO
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- CareFirst Blue Choice Opt Out Open Access
- Kaiser Maryland Medicaid MCO
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- United Medicare Private Fee-for-Service (PFFS) plans
- HumanaChoice PPO
- First Health PPO
- United Healthcare Select HMO - EPO/NPP
- UnitedHealthcare and AARP Medicare Complete Plans
- Johns Hopkins Advantage MD HMO
- Cigna Achieve Medicare (HMO C-SNP)
- M.D. IPA (HMO)
- IH-EPO Plus
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- Sentara Health
- Aetna Worker's Compensation Network
- Johns Hopkins Advantage MD PPO
- Kaiser Permanente Select - Added Choice
- Amerigroup DC Alliance
- Veterans Affairs Community Care Network
- Kaiser Permanente Select
- Jai Medical Systems - Maryland Health Choice
- Choice Care Network/HUMANA (PPO)
- CareFirst Federal Employee Program (Std. & Basic PPO)
- Humana Medicare Advantage - HMO Open Access
- UnitedHealthcare Medicare Adv. Special Needs Plans
- MultiPlan, Inc
- Aetna Elect Choice/ Open Access (POS)
- WellPoint Maryland - Maryland Health Choice
- Health Services for Children with Special Needs
- CareFirst Administrators
- Lasso Healthcare - Medicare Medical Savings Account
- CareFirst Community Health Plan of MD
- CareFirst Maryland Point of Service Plan
- Aetna Better Health of VA
- Private Fee-for-Service Plans (PFFS)
- Johns Hopkins Advantage MD PLUS PPO
- Humana Medicare Advantage - PPO
- Aetna Student Health Insurance
- CIGNA PPO
- CareFirst (NCA) Indemnity
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- MedStar Family Choice DC Healthcare Alliance
- CIGNA EPO
- Kaiser Permanente Signature - Added Choice
- United Healthcare Choice Plus Cardiac Global
- CareFirst EPO
- IH-HMO
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- AmeriHealth Caritas DC Healthcare Alliance
- IH-Network Only Plus
- Aetna Basic
- TRICARE East Prime
- Optima Family Care MCO - VA Medicaid MCO
- Optimum Choice Preferred (POS)
- DC/MD SHOP QHP Small Business Plans
- CIGNA Indemnity
- Private Health Care Systems (PPO)
- Cigna True Choice Medicare (PPO)
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- AMERIVANTAGE/Amerigroup Community Care
- Options PPO Cardiac Global
- CareFirst MedStar Select PPO
- Healthy Blue (HMO, POS)
- Beech Street PPO
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- Employee Health Plan
- Coventry Health Care National Network PPO
- Optimum Choice
- TRICARE for Life East
- Network OA
- Choice Fund PPO
- Aetna Quality Point of Service (POS)
- Mamsi Life & Health (Indem./PPO)
- United Student Resources
- Cigna Alliance Medicare (HMO)
- Aetna Advantage 5750
- Tricare Reserve Select
- Blue Choice Advantage
- IH-Open POS II
- Aetna Classic 5000
- Priority Partners - Maryland Health Choice
- CareFirst FEP Blue Focus
- Aetna Managed Choice Open Access (POS)
- NYC Medicare Advantage Plus
- Maryland Physicians Care MCO
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- CIGNA HMO & Network (HMO)
- Aetna Medicare Advantage PFFS Plan
- Aetna Advantage 6350
- UnitedHealthcare Individual Exchange Plans
- Kaiser Permanente Signature
- CareFirst BlueChoice HMO
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- Aetna Advantage 6350PD
- Alterwood Advanatge HMO & DSNP Plans
- United Healthcare Options (PPO)
- CareFirst Dual Prime HMO-SNP
- Aetna Medicare Advantage HMO & PPO Plans
- Aetna VA Exchange
- Core Essential (HMO)
- CareFirst Blue Card Program
- Coventry Health Care of Virginia
- POS OA
- Cigna True Choice Plus Medicare (PPO)
- Aetna Signature Administrator PPO/TPA
- Aetna Traditional Choice (PPO)
- Aetna Classic 3500
- Police and Fire Clinic
- Anthem BCBS of VA HealthKeepers (HMO)
- IH-Open POS Plus
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- M.D. IPA Preferred (POS)
- CIGNA HMO Open Access
- Anthem BCBS Medi Blue SNP
- Aetna Managed Choice (POS)
- MedStar Family Choice - Maryland Health Choice
- Amerigroup DC Healthy Families
- IH-Open Network Only Plus
- IH-Open HMO
- United Healthcare Navigate Cardiac Global
- TriWest Healthcare Alliance
- CIGNA Connect EPO
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- Cigna TotalCare (HMO D-SNP)
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- Kaiser Permanente Medicare Plus
- United Healthcare Choice Cardiac Global
Education
Board Certification: American Association of Nurse Practitioners
Fellowship: Johns Hopkins University School of Nursing (2024)
Graduate: Johns Hopkins University School of Nursing (2023)
Fellowship: University of Maryland Medical Center Midtown GME (2015)