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.
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List of insurance plans we accept
- Johns Hopkins Advantage MD PLUS PPO
- Coventry of Delaware HMO/PPO
- United Student Resources
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- IH-Open POS II
- OCI Direct (HMO)
- Aetna Managed Choice Open Access (POS)
- CareFirst FEP Blue Focus
- Aetna HMO
- Aetna Classic 5000PD
- CareFirst (NCA) Indemnity
- Humana Gold Plus HMO
- IH-PPO
- CareFirst BlueChoice HMO
- CareFirst Blue Preferred PPO
- Kaiser Permanente Signature
- UnitedHealthcare Individual Exchange Plans
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- First Health PPO
- CareFirst EPO
- CareFirst Dual Prime HMO-SNP
- United Healthcare Options (PPO)
- Cigna Achieve Medicare (HMO C-SNP)
- UnitedHealthcare and AARP Medicare Complete Plans
- IH-EPO Plus
- IH-Network Only Plus
- AmeriHealth Caritas DC Healthcare Alliance
- Aetna Medicare Advantage HMO & PPO Plans
- TRICARE East Prime
- Johns Hopkins Advantage MD PPO
- Aetna Open Choice (PPO)
- HealthyBlue PPO
- Choice POS
- Aetna Better Health of MD
- POS OA
- Aetna Traditional Choice (PPO)
- Aetna Signature Administrator PPO/TPA
- Cigna True Choice Plus Medicare (PPO)
- Medicare FFS
- Choice POS II Open Access
- AMERIVANTAGE/Amerigroup Community Care
- Humana Medicare Advantage - HMO Open Access
- Police and Fire Clinic
- Private Health Care Systems (PPO)
- Anthem BCBS of VA HealthKeepers (HMO)
- CIGNA HMO Open Access
- Erickson Advantage Plans
- Amerigroup DC Healthy Families
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- IH-Open EPO Plus
- United Healthcare Navigate Cardiac Global
- First Health PPO
- Employee Health Plan
- Coventry Health Care National Network PPO
- BlueChoice Open Access
- CareFirst Administrators
- WellPoint Maryland - Maryland Health Choice
- Aetna Better Health of VA
- CareFirst Maryland Point of Service Plan
- CareFirst Community Health Plan of MD
- CareFirst Group Medicare Advantage
- HumanaChoice Honor's plan PPO
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- CIGNA PPO Plus
- United Healthcare Community Plan - VA Medicaid MCO
- CareFirst Maryland Indemnity or PPO
- Mamsi Life & Health (Indem./PPO)
- Aetna Student Health Insurance
- Cigna Alliance Medicare (HMO)
- Aetna Advantage 5750
- Anthem Federal Employee Program Standard
- Blue Choice Advantage
- Tricare Reserve Select
- Kaiser Permanente Flexible Choice POS Cardiac Global
- Aetna Classic 5000
- Aetna Premier 200PD
- Priority Partners - Maryland Health Choice
- United HealthCare Community Plan - Maryland Health Choice Program
- IH-Indemnity
- CIGNA PPO
- Maryland Physicians Care MCO
- Aetna Medicare Advantage PFFS Plan
- CIGNA HMO & Network (HMO)
- CIGNA EPO
- MedStar Family Choice DC Healthcare Alliance
- Aetna Advantage 6350
- Anthem BCBS of VA HealthKeepers Plus
- CareFirst Blue Choice Opt Out Open Access
- Kaiser Maryland Medicaid MCO
- Aetna Advantage 6350PD
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- HumanaChoice PPO
- United Medicare Private Fee-for-Service (PFFS) plans
- United Healthcare Choice Plus Cardiac Global
- United Healthcare Select HMO - EPO/NPP
- Medicare Advantage - Advantra Value (PPO)
- Johns Hopkins Advantage MD HMO
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- Aetna VA Exchange
- Kaiser Permanente Select Cardiac Global
- Kaiser Permanente Select - Added Choice
- Core Essential (HMO)
- CareFirst Blue Card Program
- Kaiser Permanente Medicare Advantage Signature and Select
- Anthem BCBS Medi Blue Dual Adv
- CareFirst NASCO
- Optimum Choice Preferred (POS)
- Jai Medical Systems - Maryland Health Choice
- Kaiser Permanente Select
- CareFirst Federal Employee Program (Std. & Basic PPO)
- OA Plus
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- IH-Open POS Plus
- UnitedHealthcare Medicare Adv. Special Needs Plans
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- M.D. IPA Preferred (POS)
- Healthy Blue (HMO, POS)
- Uniformed Services Family Health Plan
- IH-Open Network Only Plus
- MultiPlan, Inc
- Navigate
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- CareFirst MedStar PPO
- Lasso Healthcare - Medicare Medical Savings Account
- Private Fee-for-Service Plans (PFFS)
- Choice Fund PPO
- United Healthcare Choice Cardiac Global
- Aetna Quality Point of Service (POS)
- Humana Medicare Advantage - PPO
- MedStar Family Choice DC Healthy Families
- Medicare Direct
- Geisinger Medicare Advantage
- TRICARE East Select
- Kaiser Permanente Flexible Choice 3-tier POS
- IH-POS Plus
- AmeriHealth Caritas DC Healthy Families
- NYC Medicare Advantage Plus
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- CIGNA SureFit (HMO)
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- Kaiser Permanente Signature - Added Choice
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- Select HMO/HealthFund/Health Network
- Cigna Preferred Medicare (HMO)
- Alterwood Advanatge HMO & DSNP Plans
- IH-HMO
- M.D. IPA (HMO)
- Aetna Basic
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- Aetna Worker's Compensation Network
- Sentara Health
- HighMark
- Anthem BCBS Medi Blue Plus
- Amerigroup DC Alliance
- Kaiser Permanente HMO Plus and DHMO Plus Member
- CIGNA POS/Network POS
- Coventry Health Care of Virginia
- Veterans Affairs Community Care Network
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- Optima Family Care MCO - VA Medicaid MCO
- Aetna Classic 3500
- DC/MD SHOP QHP Small Business Plans
- Advantra Platinum (PPO)
- Choice Care Network/HUMANA (PPO)
- IH-Open HMO Option
- CIGNA Indemnity
- Cigna True Choice Medicare (PPO)
- Options PPO Cardiac Global
- United Healthcare Choice Plus
- Aetna Managed Choice (POS)
- Anthem BCBS Medi Blue SNP
- CareFirst MedStar Select PPO
- Beech Street PPO
- MedStar Family Choice - Maryland Health Choice
- Choice POS II
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- IH-Open HMO
- Aetna Elect Choice/ Open Access (POS)
- TriWest Healthcare Alliance
- CIGNA Connect EPO
- Great-West Healthcare POS/CIGNA
- Magellan Complete Care of VA - VA Medicaid MCO
- IH-POS
- Health Services for Children with Special Needs
- TRICARE for Life East
- Optimum Choice
- UHC Passport
- Network OA
- Anthem Federal Employee Program Basic
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- Cigna TotalCare (HMO D-SNP)
- United Healthcare Select Plus (POS)
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- United Healthcare Choice
- Kaiser Permanente Medicare Plus
Education
Board Certification: American Association of Nurse Practitioners, American Academy 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)