AS
28 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Stefan, Gastroenterologist in Portland, ME?
Dr. Andreas Stefan, MD is a Gastroenterologist, who primarily practices in Portland, ME. He has been practicing for over 28 years. Dr. Stefan graduated from University of Minnesota Med School. Dr. Stefan is fluent in English, and is currently seeing new patients. Dr. Stefan’s practice accepts Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Stefan’s office at (207) 773-7964.
Where did Dr. Stefan go to medical school and complete their residency?
Medical School: University of Minnesota Med School
What languages does Dr. Stefan speak?
Dr. Stefan and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Stefan treat?
As a Gastroenterologist, Dr. Stefan diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Stefan. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Acid Reflux
- GERD
- Acid Reflux (GER & GERD) in Adults
- Acid Reflux (GER & GERD) in Children
- Acid Reflux (GER & GERD) in Infants
- Gastroesophageal Reflux
- Heartburn
- Indigestion
ICD-10 Codes:
- K219: Gastro-esophageal reflux disease without esophagitis
Also known as:
- Blocked Bile Duct
- Bile Duct Disease
- Biliary Obstruction
- Bile Duct Blockage
- Obstructed Bile Duct
ICD-10 Codes:
- K831: Obstruction of bile duct
Also known as:
- Blocked Esophagus
- Esophagus Disorder
- Esophageal Obstruction
- Food Pipe Blockage
- Swallowing Difficulty
ICD-10 Codes:
- K222: Esophageal obstruction
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
Also known as:
- Benign Ascending Colon Polyp
- Benign Tumor
- Colonic Polyps
- Colon Polyps
- Non-cancerous ascending colon growth
- Ascending colon adenoma
- Ascending colon benign tumor
ICD-10 Codes:
- D122: Benign neoplasm of ascending colon
Also known as:
- Chronic Pancreatitis
- Pancreatitis
- Hereditary pancreatitis
- Long-Term Pancreas Inflammation
- Ongoing Pancreatitis
ICD-10 Codes:
- K861: Other chronic pancreatitis
What procedures does Dr. Stefan perform?
As a Gastroenterologist, Dr. Stefan performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Stefan. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colonoscopy with Polyp Removal
- Colonoscopy with Biopsy
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Balloon Dilation
- Colonoscopy with Polyp/Tumor Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Flexible Colonoscopy
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Flexible Colonoscopy with Dilation
- Colon Dilation during Colonoscopy
- Endoscopic Balloon Dilation of Colon
- Flexible colonoscopy with ablation
- Colon polyp removal
- Colon tumor destruction
- Therapeutic colonoscopy
CPT Codes:
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45386: Colonoscopy, flexible; with transendoscopic balloon dilation
- 45388: Colonoscopy, flexible; with ablation of tumor(s), polyp(s), or other lesion(s) (includes pre- and post-dilation and guide wire passage, when performed)
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Also known as:
- Esophagus Widening Procedure (Endoscopic)
- ERCP with Biopsy
- EGD with Esophageal Balloon Dilation
- Diagnostic Upper Endoscopy with Biopsy
- Colonoscopy with Injections
- Flexible Sigmoidoscopy with Biopsy
- ERCP with Gallstone or Pancreatic Stone Removal
- Small Intestine Endoscopy with Biopsy
- Upper Endoscopy with Injections
- Upper Endoscopy with Varices Banding
- Small Intestine Endoscopy with Tumor/Polyp Removal
- Upper Endoscopy with Mucosal Resection
- Small Intestine Endoscopy to Stop Bleeding
- Small Intestine Endoscopy with Polyp Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Esophageal Dilation
- EGD with Dilation
- Upper Endoscopy with Widening
- Endoscopic Retrograde Cholangiopancreatography with Biopsy
- Bile Duct Biopsy (ERCP)
- Pancreatic Duct Biopsy (ERCP)
- Upper Endoscopy with Esophageal Dilation
- Flexible Esophagoscopy with Balloon
- EGD with Balloon Widening
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
- Sigmoid Colon Scope with Biopsy
- Lower Endoscopy with Tissue Sample
- Flexible Sigmoidoscopy and Biopsy
- Rectum and Lower Colon Exam
- Endoscopic Retrograde Cholangiopancreatography
- Bile Duct Stone Removal
- Pancreatic Stone Lithotripsy
- Enteroscopy with Biopsy
- Small Bowel Endoscopy
- Intestinal Biopsy (Endoscopic)
- EGD with Submucosal Injections
- Esophagogastroduodenoscopy with Injections
- Stomach Scope with Medication
- EGD with Band Ligation
- Esophageal Varices Banding
- Gastric Varices Treatment
- Enteroscopy with Lesion Ablation
- Small Bowel Polyp Removal
- Intestinal Tumor Ablation (Endoscopic)
- Enteroscopy
- Diagnostic Small Bowel Endoscopy
- Small Bowel Scope
- EGD with Mucosal Resection
- Endoscopic Removal of Esophageal Lesion
- Flexible Endoscopy with Tissue Removal
- Enteroscopy with Bleeding Control
- Small Bowel Endoscopy for Bleeding
- Deep Enteroscopy
- Intestinal Bleeding Treatment Endoscopy
- Enteroscopy with Lesion Removal
- Therapeutic Enteroscopy
CPT Codes:
- 43248: Esophagogastroduodenoscopy, flexible, transoral; with insertion of guide wire followed by passage of dilator(s) through esophagus over guide wire
- 43261: Endoscopic retrograde cholangiopancreatography (ERCP); with biopsy, single or multiple
- 43249: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic balloon dilation of esophagus (less than 30 mm diameter)
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
- 45331: Sigmoidoscopy, flexible; with biopsy, single or multiple
- 43265: Endoscopic retrograde cholangiopancreatography (ERCP); with destruction of calculi, any method (eg, mechanical, electrohydraulic, lithotripsy)
- 44361: Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; with biopsy, single or multiple
- 43236: Esophagogastroduodenoscopy, flexible, transoral; with directed submucosal injection(s), any substance
- 43244: Esophagogastroduodenoscopy, flexible, transoral; with band ligation of esophageal/gastric varices
- 44369: Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; with ablation of tumor(s), polyp(s), or other lesion(s) not amenable to removal by hot biopsy forceps, bipolar cautery or snare technique
- 44360: Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 43254: Esophagogastroduodenoscopy, flexible, transoral; with endoscopic mucosal resection
- 44366: Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; with control of bleeding (eg, injection, bipolar cautery, unipolar cautery, laser, heater probe, stapler, plasma coagulator)
- 44364: Small intestinal endoscopy, enteroscopy beyond second portion of duodenum, not including ileum; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- ERCP with Stent Placement
- ERCP with Sphincterotomy
- ERCP with Bile or Pancreatic Duct Stent Removal
- ERCP for Bile/Pancreatic Stent Exchange
- ERCP with Bile Duct Dilation
- ERCP with Tumor Removal
- Diagnostic ERCP
- Endoscopic Retrograde Cholangiopancreatography with Stent
- Bile Duct Stent Placement via ERCP
- Pancreatic Duct Stent Placement via ERCP
- Endoscopic retrograde cholangiopancreatography
- Bile duct scope
- Pancreatic duct scope
- Papillotomy
- Endoscopic Retrograde Cholangiopancreatography
- Bile Duct Stent Removal
- Pancreatic Duct Foreign Body Removal
- ERCP Stone Removal
- Bile duct stent replacement (ERCP)
- Endoscopic retrograde cholangiopancreatography with stent exchange
- Biliary stent removal and replacement
- Pancreatic duct stent exchange
- Endoscopic Retrograde Cholangiopancreatography with Dilation
- Bile Duct Widening via ERCP
- Pancreatic Duct Balloon Dilation
- Endoscopic Retrograde Cholangiopancreatography with Ablation
- Bile Duct Tumor Removal ERCP
- Pancreatic Duct Lesion Ablation
CPT Codes:
- 43274: Endoscopic retrograde cholangiopancreatography (ERCP); with placement of endoscopic stent into biliary or pancreatic duct, including pre- and post-dilation and guide wire passage, when performed, including sphincterotomy, when performed, each stent
- 43262: Endoscopic retrograde cholangiopancreatography (ERCP); with sphincterotomy/papillotomy
- 43275: Endoscopic retrograde cholangiopancreatography (ERCP); with removal of foreign body(s) or stent(s) from biliary/pancreatic duct(s)
- 43276: Endoscopic retrograde cholangiopancreatography (ERCP); with removal and exchange of stent(s), biliary or pancreatic duct, including pre- and post-dilation and guide wire passage, when performed, including sphincterotomy, when performed, each stent exchanged
- 43277: Endoscopic retrograde cholangiopancreatography (ERCP); with trans-endoscopic balloon dilation of biliary/pancreatic duct(s) or of ampulla (sphincteroplasty), including sphincterotomy, when performed, each duct
- 43278: Endoscopic retrograde cholangiopancreatography (ERCP); with ablation of tumor(s), polyp(s), or other lesion(s), including pre- and post-dilation and guide wire passage, when performed
- 43260: Endoscopic retrograde cholangiopancreatography (ERCP); diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- ERCP with Gallstone Removal
- ERCP
- Endoscopic Gallstone Removal
- Biliary Duct Stone Removal
- Pancreatic Duct Cleaning
CPT Codes:
- 43264: Endoscopic retrograde cholangiopancreatography (ERCP); with removal of calculi/debris from biliary/pancreatic duct(s)
Also known as:
- Endoscopic Tube Placement into Bile or Pancreatic Duct
- ERCP Cannulation
- Bile Duct Cannulation
- Pancreatic Duct Access (Endoscopic)
CPT Codes:
- 43273: Endoscopic cannulation of papilla with direct visualization of pancreatic/common bile duct(s) (List separately in addition to code(s) for primary procedure)
Also known as:
- Upper Endoscopy with Polyp Removal
- Upper Endoscopy with Stomach/Duodenum Dilation
- Upper Endoscopy with Tumor Ablation
- EGD with Polypectomy
- Esophagus, Stomach, Duodenum Scope with Removal
- Flexible Endoscopy Tumor Excision
- EGD with Dilation
- Esophageal Dilation
- Stomach Stricture Widening
- Duodenal Stricture Repair
- EGD with Ablation
- Esophagus, Stomach, Duodenum Scope with Ablation
- Flexible Endoscopy Lesion Treatment
CPT Codes:
- 43251: Esophagogastroduodenoscopy, flexible, transoral; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 43245: Esophagogastroduodenoscopy, flexible, transoral; with dilation of gastric/duodenal stricture(s) (eg, balloon, bougie)
- 43270: Esophagogastroduodenoscopy, flexible, transoral; with ablation of tumor(s), polyp(s), or other lesion(s) (includes pre- and post-dilation and guide wire passage, when performed)
Also known as:
- Upper Endoscopy for Foreign Body Removal
- EGD for Foreign Body
- Gastroscopy for Object Removal
- Esophagogastroduodenoscopy for Foreign Body
CPT Codes:
- 43247: Esophagogastroduodenoscopy, flexible, transoral; with removal of foreign body(s)
Also known as:
- Upper GI Scope with Stent Placement
- EGD with Stent
- Esophageal Stent Placement
- Stomach Stent Insertion
CPT Codes:
- 43266: Esophagogastroduodenoscopy, flexible, transoral; with placement of endoscopic stent (includes pre- and post-dilation and guide wire passage, when performed)
Also known as:
- Ileoscopy with Biopsy through Stoma
- Stoma Ileoscopy
- Small Bowel Scope with Biopsy
- Ileal Pouch Endoscopy
CPT Codes:
- 44382: Ileoscopy, through stoma; with biopsy, single or multiple
Also known as:
- Upper GI Endoscopy with Ultrasound Biopsy
- Biopsy
- Endoscopy
- Ultrasound
- EGD with EUS-FNA
- Endoscopic Ultrasound Biopsy
- Esophageal/Stomach Biopsy
CPT Codes:
- 43238: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic ultrasound-guided intramural or transmural fine needle aspiration/biopsy(s), (includes endoscopic ultrasound examination limited to the esophagus, stomach or duodenum, and adjacent structures)
Also known as:
- Feeding Tube Placement with Endoscopy
- PEG Tube Placement
- Gastrostomy Tube Insertion
- EGD with Feeding Tube
- Percutaneous Endoscopic Gastrostomy
CPT Codes:
- 43246: Esophagogastroduodenoscopy, flexible, transoral; with directed placement of percutaneous gastrostomy tube
Also known as:
- Ileoscopy Through Stoma
- Diagnostic ileoscopy via stoma
- Ileum examination through ostomy
- Small bowel endoscopy via stoma
CPT Codes:
- 44380: Ileoscopy, through stoma; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Stopping Bleeding in Esophagus, Stomach, or Duodenum
- EGD with Bleeding Control
- Upper GI Endoscopy for Bleeding
- Gastric Bleeding Treatment
CPT Codes:
- 43255: Esophagogastroduodenoscopy, flexible, transoral; with control of bleeding, any method
Also known as:
- Upper Endoscopy with Ultrasound and Biopsy
- Biopsy
- Endoscopy
- Ultrasound
- EGD with Endoscopic Ultrasound Biopsy
- Transoral EUS-FNA
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43242: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic ultrasound-guided intramural or transmural fine needle aspiration/biopsy(s) (includes endoscopic ultrasound examination of the esophagus, stomach, and either the duodenum or a surgically altered stomach where the jejunum is examined distal to the anastomosis)
Also known as:
- Sigmoidoscopy with Polyp Removal
- Colorectal Cancer Screening Tests
- Flexible Sigmoidoscopy with Polypectomy
- Colon Polyp Removal (Lower Colon)
- Sigmoid Colon Lesion Excision
- Lower Endoscopy with Polyp Removal
CPT Codes:
- 45338: Sigmoidoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- Flexible Sigmoidoscopy
- Colorectal Cancer Screening Tests
- Sigmoidoscopy
- Lower colon exam
- Flexible colon scope
- Rectum and lower colon check
CPT Codes:
- 45330: Sigmoidoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Ileoscopy with Balloon Dilation (through Stoma)
- Small Intestine Dilation
- Stoma Scope with Dilation
- Ileal Stricture Dilation
CPT Codes:
- 44381: Ileoscopy, through stoma; with transendoscopic balloon dilation
Also known as:
- Capsule Endoscopy
- Pill Camera
- Wireless Capsule Endoscopy
- Small Bowel Capsule Endoscopy
- Intestinal Imaging Pill
CPT Codes:
- 91110: Gastrointestinal tract imaging, intraluminal (eg, capsule endoscopy), esophagus through ileum, with interpretation and report
Does Dr. Stefan accept my insurance?
Dr. Stefan accepts most major insurance plans. Important: Please call our office at (207) 773-7964 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Stefan accept in Portland, ME?
Dr. Stefan in Portland, ME accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
CVS Health (formerly Aetna)
EL Paso Corporation
Elevance Health Inc. (formerly Anthem)
Express Scripts
Martin's Point
Medical Center East Health Plan
Medicare
State of Maine
State of Tennessee
UnitedHealthcare
View All Insurances
Where is Dr. Stefan's office located?
What is Dr. Stefan's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Stefan's National Provider Identifier (NPI) number is 1831299460.
What common questions do patients ask about Dr. Stefan?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Stefan
What is Dr. Andreas Stefan's specialty?
Dr. Stefan is a Gastroenterologist near Portland, ME. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Stefan to book an appointment today.
Is this Dr. Andreas Stefan affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Stefan is affiliated with MaineHealth Maine Medical Center Portland, Mid Coast Hospital, Pen Bay Medical Center, Northern Light Eastern Maine Medical Center, MaineGeneral Medical Center which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Andreas Stefan accepting new patients in Portland, ME?
Yes, Dr. Andreas Stefan is accepting new patients at this time.
Does Dr. Andreas Stefan offer online booking?
Please contact Dr. Stefan's office at (207) 773-7964 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Andreas Stefan?
Please contact Dr. Stefan's office at (207) 773-7964 for information regarding telehealth appointment availability or for scheduling assistance.
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