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
- Ascites
- 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
- Candidiasis
- Chronic Constipation
- Chronic Diarrhea
- Colitis
- Colon Cancer
- Colon Polyps
- Congenital Malformations Of Digestive System
- Congenital Malformations Of Esophagus
- Congenital Malformations Of Gallbladder, Bile Ducts And Liver
- Congenital Malformations Of Intestine
- Congenital Malformations Of Peripheral Vascular 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
- Family History Of Malignant Neoplasm
- Family History Of Specific Disorders
- Flatulence
- Functional Dyspepsia
- Functional Intestinal Disorders
- Gallbladder Disease
- Gallstones
- Gastric Cancer
- Gastritis
- Gastrointestinal Bleeding
- General Symptoms
- Genetic Susceptibility To Disease
- Helicobacter Pylori
- Hemorrhoids
- Hemorrhoids And Perianal Venous Thrombosis
- Hepatitis C
- Hepatomegaly
- Hepatomegaly And Splenomegaly
- Jaundice
- Liver Cancer
- Liver Cirrhosis
- Liver Failure
- Liver Fibrosis
- Malabsorption
- Melena
- Nausea
- Noninfective Gastroenteritis
- Pancreatitis
- Paralytic Ileus And Intestinal Obstruction
- Peptic Ulcer Disease
- Perianal Fistula
- Personal History Of Diseases And Conditions
- 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
- Vascular Disorders Of Intestine
- Viral Hepatitis
- Vomiting
Procedures I perform
- Abdominal Ultrasound
- Capsule Endoscopy
- Celiac Disease Treatment
- Celiac Plexus Block
- 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
- Esophagectomy
- Esophagogastroduodenoscopy With Biopsy
- Fecal Microbiota Transplant
- Fecal Transplant
- Flexible Colonoscopy With Biopsy
- Gastrointestinal Biopsy
- Gastrointestinal Cancer Treatment
- 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
- Rectal Excision
- Retrograde Cholangiopancreatography
- Sigmoidoscopy With Biopsy
- Stomach Cancer Treatment
- 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
- Kaiser Permanente Flexible Choice POS Cardiac Global
- Cigna TotalCare (HMO D-SNP)
- Anthem Federal Employee Program Standard
- Core Essential (HMO)
- CareFirst EPO
- United Healthcare Choice Plus Cardiac Global
- Healthy Blue (HMO, POS)
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- Cigna Preferred Medicare (HMO)
- MultiPlan, Inc
- UnitedHealthcare Individual Exchange Plans
- HumanaChoice Honor's plan PPO
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- United Medicare Private Fee-for-Service (PFFS) plans
- Aetna Quality Point of Service (POS)
- Aetna Medicare Advantage HMO & PPO Plans
- United Healthcare Choice
- MedStar Family Choice - Maryland Health Choice
- Kaiser Permanente Signature - Added Choice
- Kaiser Permanente Signature
- MedStar Family Choice DC Healthcare Alliance
- Police and Fire Clinic
- United Student Resources
- Tricare Reserve Select
- Aetna Classic 5000PD
- Aetna Better Health of MD
- Aetna Managed Choice (POS)
- Mamsi Life & Health (Indem./PPO)
- Aetna Advantage 6350PD
- Johns Hopkins Advantage MD PPO
- Alterwood Advanatge HMO & DSNP Plans
- HealthyBlue PPO
- CareFirst Dual Prime HMO-SNP
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- M.D. IPA Preferred (POS)
- United Healthcare Options (PPO)
- BlueChoice Open Access
- CareFirst BlueChoice HMO
- Great-West Healthcare POS/CIGNA
- Priority Partners - Maryland Health Choice
- Sentara Health
- IH-Open EPO Plus
- CIGNA Indemnity
- Medicare Direct
- IH-Open HMO Option
- Amerigroup DC Healthy Families
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- Mamsi Life & Health (Indem./PPO)
- IH-Open POS II
- Medicare FFS
- Aetna Worker's Compensation Network
- TRICARE East Select
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- WellPoint Maryland - Maryland Health Choice
- Anthem BCBS Medi Blue Plus
- CareFirst Community Health Plan of MD
- Network OA
- Aetna Classic 5000
- Humana Medicare Advantage - PPO
- IH-EPO Plus
- Maryland Physicians Care MCO
- Kaiser Permanente Select Cardiac Global
- UHC Passport
- Humana Gold Plus HMO
- CareFirst Maryland Point of Service Plan
- CIGNA HMO Open Access
- Coventry Health Care of Virginia
- United HealthCare Community Plan - Maryland Health Choice Program
- Advantra Platinum (PPO)
- CareFirst Federal Employee Program (Std. & Basic PPO)
- AmeriHealth Caritas DC Healthy Families
- CIGNA PPO
- Optimum Choice
- POS OA
- Geisinger Medicare Advantage
- IH-Open POS Plus
- Aetna Managed Choice Open Access (POS)
- AmeriHealth Caritas DC Healthcare Alliance
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- MedStar Family Choice DC Healthcare Alliance
- Amerigroup DC Alliance
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- First Health PPO
- CIGNA HMO & Network (HMO)
- MedStar Family Choice - Maryland Health Choice
- Erickson Advantage Plans
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- Anthem Federal Employee Program Basic
- Blue Choice Advantage
- Johns Hopkins Advantage MD PLUS PPO
- Kaiser Permanente HMO Plus and DHMO Plus Member
- Aetna Advantage 5750
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- Aetna Signature Administrator PPO/TPA
- Cigna True Choice Plus Medicare (PPO)
- CIGNA PPO Plus
- First Health PPO
- Anthem BCBS Medi Blue SNP
- Anthem BCBS of VA HealthKeepers (HMO)
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- CareFirst FEP Blue Focus
- Navigate
- Options PPO Cardiac Global
- Cigna True Choice Medicare (PPO)
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- UnitedHealthcare and AARP Medicare Complete Plans
- Aetna Open Choice (PPO)
- IH-POS
- Employee Health Plan
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- Kaiser Permanente Medicare Advantage Signature and Select
- Humana Medicare Advantage - HMO Open Access
- AMERIVANTAGE/Amerigroup Community Care
- Aetna Basic
- Kaiser Permanente Flexible Choice 3-tier POS
- Kaiser Permanente Select
- UnitedHealthcare Medicare Adv. Special Needs Plans
- IH-HMO
- CIGNA SureFit (HMO)
- CareFirst NASCO
- Medicare Advantage - Advantra Value (PPO)
- CareFirst Blue Choice Opt Out Open Access
- United Healthcare Select HMO - EPO/NPP
- Aetna Student Health Insurance
- Cigna Achieve Medicare (HMO C-SNP)
- CIGNA Connect EPO
- Veterans Affairs Community Care Network
- Johns Hopkins Advantage MD HMO
- Aetna Traditional Choice (PPO)
- Kaiser Permanente Select - Added Choice
- Magellan Complete Care of VA - VA Medicaid MCO
- Aetna Premier 200PD
- Anthem BCBS of VA HealthKeepers Plus
- IH-PPO
- Beech Street PPO
- Jai Medical Systems - Maryland Health Choice
- Health Services for Children with Special Needs
- MedStar Family Choice DC Healthy Families
- CareFirst (NCA) Indemnity
- Coventry of Delaware HMO/PPO
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Anthem BCBS Medi Blue Dual Adv
- Select HMO/HealthFund/Health Network
- Optima Family Care MCO - VA Medicaid MCO
- OA Plus
- HumanaChoice PPO
- Choice POS II Open Access
- CareFirst Group Medicare Advantage
- Coventry Health Care National Network PPO
- Private Health Care Systems (PPO)
- IH-Indemnity
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- CIGNA EPO
- Choice Fund PPO
- CIGNA POS/Network POS
- CareFirst Blue Card Program
- TRICARE East Prime
- NYC Medicare Advantage Plus
- United Healthcare Choice Cardiac Global
- CareFirst MedStar Select PPO
- Aetna Better Health of VA
- United Healthcare Choice Plus
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- Aetna Classic 3500
- CareFirst Administrators
- CareFirst MedStar PPO
- TriWest Healthcare Alliance
- DC/MD SHOP QHP Small Business Plans
- Aetna VA Exchange
- Choice POS II
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- Uniformed Services Family Health Plan
- HighMark
- Choice Care Network/HUMANA (PPO)
- United Healthcare Select Plus (POS)
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- Kaiser Maryland Medicaid MCO
- Lasso Healthcare - Medicare Medical Savings Account
- Choice POS
- OCI Direct (HMO)
- Aetna Advantage 6350
- CareFirst Blue Preferred PPO
- IH-POS Plus
- Private Fee-for-Service Plans (PFFS)
- Aetna Medicare Advantage PFFS Plan
- United Healthcare Navigate Cardiac Global
- Aetna Elect Choice/ Open Access (POS)
- IH-Open HMO
- Optimum Choice Preferred (POS)
- CareFirst Maryland Indemnity or PPO
- Cigna Alliance Medicare (HMO)
- TRICARE for Life East
- Aetna HMO
- M.D. IPA (HMO)
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- Kaiser Permanente Medicare Plus
- UnitedHealthcare Individual Exchange Plans
- United Healthcare Community Plan - VA Medicaid MCO
- IH-Network Only Plus
- IH-Open Network Only Plus
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)