JONATHAN HARRIS TAYLOR M.D.
NPI 1114134780
Urology in Greenville, NC

Q: What is Jonathan Taylor's NPI number?

The NPI number for Jonathan Taylor is 1114134780. It was assigned to this individual provider in the NPPES registry on May 16, 2007.

Q: What is Jonathan Taylor's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Q: When was this NPI record last updated?

The NPPES record for Jonathan Taylor was last updated on May 14, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 16, 2007PECOS EnrolledAccepts Medicare Assignment

1850 W ARLINGTON BLVD, GREENVILLE, NC 27834(252) 413-6678(252) 215-2905 Get Directions Write a Review

NPPES record last updated: May 14, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Jonathan Harris Taylor M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JONATHAN HARRIS TAYLOR M.D. (NPI 1114134780) is an individual urology provider in Greenville, North Carolina, licensed in North Carolina (200700626) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Ecu Health Medical Center, and maintains a secondary practice location in Greenville.

NPPES Registry Identity

NPI1114134780

Entity TypeIndividualMale

Primary Taxonomy208800000X

Provider Legal NameJONATHAN HARRIS TAYLORCredential: M.D.

Location Address1850 W ARLINGTON BLVDGreenville, NC 27834

Mailing Address1850 W Arlington BlvdGreenville, NC 27834-5704 · (252) 413-6678 · Fax (252) 215-2905

Phone(252) 413-6678

Fax(252) 215-2905

Sole ProprietorNo

Medical School CMSBrody School Of Medicine At East Carolina UniversityGraduated 2002

Enumeration DateMay 16, 2007

Last NPPES UpdateMay 14, 2019

✔ NPI 1114134780 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians

Taxonomy Code208800000X

License✔ Licensed in NC · 200700626

Definition

A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

1850 W ARLINGTON BLVD, Greenville, NC 27834

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Secondary Practice Location 1

Location 1275 Bethesda DrGreenville, NC 27834-7217 · Phone (252) 752-5077 · Fax (252) 752-9544

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Jonathan Harris Taylor M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981797446

PECOS Enrollment IDI20070829000915

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Jonathan Taylor reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Physicians East PA

Same address

Multi-Specialty

1850 W ARLINGTON BLVD
Greenville, NC 27834

Reassigned Medicare billing, North Carolina enrollment
103 clinicians in this Medicare group

NPI 1598761967 (252) 752-6101

Vidant Medical Group LLC

0.6 mi

Multi-Specialty

2100 STANTONSBURG RD
Greenville, NC 27834

Reassigned Medicare billing, North Carolina enrollment
1,653 clinicians in this Medicare group

NPI 1477648731 (252) 847-2181

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 60

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

10,888 services104 patients

Injection, gadoterate meglumine, 0.1 ml A9575

Gadoterate meglumine is a contrast agent used in MRI scans to help visualize certain areas of your body more clearly. It's injected into your bloodstream, typically through a vein in your arm, and helps doctors get more detailed images.

3,550 services19 patients

Injection, onabotulinumtoxina, 1 unit J0585

Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.

2,500 services17 patients

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

2,480 services12 patients

Injection, gadobutrol, 0.1 ml A9585

Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.

1,600 services16 patients

Low osmolar contrast material, 200-299 mg/ml iodine concentration, per ml Q9966

Low osmolar contrast material with 200-299 mg/ml iodine concentration is a type of dye used in certain medical tests like CT scans or X-rays. It helps to highlight specific areas in your body, making them easier to see and examine. It's safe and commonly used.

950 services12 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

532 services414 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

495 services352 patients

Diagnostic exam of bladder and urethra using an endoscope 52000

This procedure involves using a thin, flexible tube with a light, called an endoscope, to examine the bladder and urethra. It helps in identifying any abnormalities or issues that may be causing discomfort or other symptoms.

412 services328 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

362 services317 patients

Psa (prostate specific antigen) measurement, total 84153

PSA measurement is a simple blood test that checks for a specific protein produced by your body. High levels could indicate a health issue that needs further investigation. It's often used to monitor general wellness and is part of routine health screening.

258 services190 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

175 services165 patients

Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings 51784

This procedure involves the use of non-invasive devices to record the electrical activity of muscles at specific body openings. It's helpful in understanding muscle function and can assist in diagnosing certain conditions.

174 services148 patients

Leuprolide acetate (for depot suspension), 7.5 mg J9217

Leuprolide acetate is a medication that helps regulate certain hormone levels in your body. It's injected into your muscle once a month. This treatment can help manage various health conditions related to hormone imbalance. Always follow your doctor's instructions.

174 services23 patients

Blood test, basic group of blood chemicals (calcium, total) 80048

A basic group blood test measures the levels of certain chemicals in your blood, including calcium. This helps assess your overall health and detect potential problems. The procedure involves drawing a small amount of blood from your arm, which is then analyzed in a lab.

171 services164 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

157 services153 patients

Bacterial colony count, urine 87086

A bacterial colony count, urine, is a laboratory test that checks a urine sample for bacteria. It helps to identify if an infection is present in the urinary system. High numbers of bacteria in the urine can indicate a urinary tract infection (UTI).

141 services134 patients

Electronic assessment of bladder emptying 51741

Electronic assessment of bladder emptying is a non-invasive test that measures how well your bladder functions. It uses ultrasound technology to create images of your bladder before and after you use the restroom, helping to identify any issues with bladder emptying.

128 services128 patients

Ct scan of abdomen and pelvis before and after contrast 74178

A CT scan of your abdomen and pelvis with and without contrast helps visualize your internal organs better. Contrast is a special dye that improves the clarity of the images. It's taken orally or injected into your veins before the scan. The process is painless and quick.

115 services104 patients

Complex measurement of pressure of urine flow in bladder with voiding pressure studies 51728

This procedure measures the pressure in your bladder as it fills and empties. It helps to understand how well your bladder is functioning. Sensors record pressure levels during these processes, providing valuable data for your doctor.

109 services109 patients

Insertion of device into abdomen with pressure and urine flow rate study 51797

This procedure involves placing a small device into your abdomen to monitor pressure and urine flow rates. It helps in understanding how well your body is processing and eliminating liquid waste. It's a safe procedure, typically performed under local anesthesia.

105 services105 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

94 services94 patients

Blood creatinine level 82565

A blood creatinine level test measures the amount of creatinine in your blood. Creatinine is a waste product that your body produces when it uses energy. High levels may indicate that your kidneys aren't working properly. This test is often used to monitor kidney health.

83 services77 patients

Simple change of bladder tube 51705

A simple change of bladder tube involves replacing your current urinary drainage tube with a new one. This is done to maintain hygiene and prevent infections. It's a straightforward process, usually causing minimal discomfort, and helps ensure your body can properly dispose of waste fluids.

77 services26 patients

Biopsy of prostate gland 55700

A biopsy of the prostate gland is a procedure where a small sample of tissue is taken from your body's internal gland, located near the bladder, for testing. This helps in diagnosing potential health issues. It's usually done with a fine needle and imaging technology for accuracy.

73 services73 patients

Ultrasound scan of pelvic region through rectum 76872

An ultrasound scan of the pelvic region through the rectum is a medical procedure where a small, smooth device is gently inserted into the rectum. This device uses sound waves to create images of the internal structures in the lower abdomen, aiding in diagnosis and treatment planning.

73 services73 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

69 services22 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

68 services68 patients

Complete laser vaporization of prostate including control of bleeding using an endoscope 52648

This procedure involves using a special light instrument to carefully remove tissue from a gland located in the lower body. This helps improve the flow of body fluids. The process is done through a tube-like device and also controls any bleeding.

65 services65 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

65 services56 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

61 services61 patients

Blood test, clotting time 85610

A clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.

59 services56 patients

Bacterial culture for aerobic isolates 87077

A bacterial culture for aerobic isolates is a lab test that helps identify bacteria that thrive in oxygen-rich environments. A sample from the suspected infection site is collected, then placed in a special medium that promotes bacterial growth. After a set period, the lab identifies any bacteria present, aiding in accurate diagnosis and treatment.

53 services49 patients

Evaluation of antimicrobial drug (antibiotic, antifungal, antiviral), microdilution or agar dilution 87186

This process checks how well certain drugs, like antibiotics, can fight against infections. It involves mixing the drug with a microbe (like bacteria or a virus) in a lab. By observing how the microbe reacts, it helps determine the best drug to treat your infection.

52 services49 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

51 services44 patients

Coagulation assessment blood test, plasma or whole blood 85730

A coagulation assessment blood test evaluates how well your blood clots, helping identify potential bleeding or clotting disorders. This test uses a sample of your plasma or whole blood. It's a standard procedure to ensure your body's clotting process is functioning properly.

51 services50 patients

Application of electrical stimulation with therapist present, each 15 minutes 97032

Electrical stimulation is a therapeutic treatment that sends light electrical pulses to a specific area of your body. This is done under the supervision of a therapist for 15-minute intervals. It can reduce pain, stimulate muscles, and improve circulation.

50 services30 patients

Imaging of urinary tract following injection of a contrast agent 74420

This procedure involves injecting a contrast agent into your body to help highlight the urinary tract during imaging. The contrast agent makes your urinary tract more visible on the images, providing detailed information about its structure and function. This can help in diagnosing any potential issues.

48 services40 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

44 services41 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

40 services40 patients

Simple insertion of temporary bladder tube 51702

This procedure involves placing a temporary tube into your bladder to help with urine flow. It's done when the body can't naturally remove urine. The tube is inserted through a small opening and allows urine to drain into a bag. It's usually a short-term solution.

35 services18 patients

Crushing of stone of ureter with insertion of stent using an endoscope 52356

This procedure involves using a thin, flexible tube (endoscope) to locate and break down kidney stones in the ureter. After this, a small tube (stent) is inserted to help maintain an open pathway for urine to flow.

33 services29 patients

Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle 96402

This procedure involves the injection of hormone-based anti-cancer drugs under the skin or into a muscle. These medications help to slow down or stop the growth of certain types of cancer cells. The process is usually quick and can be performed in a clinic or hospital.

32 services24 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

25 services25 patients

Detection test by nucleic acid for staphylococcus aureus, methicillin resistant (mrsa bacteria), amplified probe technique 87641

A detection test by nucleic acid for MRSA bacteria uses an amplified probe technique. It's a lab procedure that identifies the presence of MRSA, a type of bacteria resistant to many antibiotics. This test helps in deciding the best treatment.

24 services24 patients

Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies 51729

This procedure helps to measure the pressure inside your bladder while passing fluid. It checks how well your bladder and the tube that carries fluid from your bladder are working. It's important for diagnosing issues with fluid flow and storage.

23 services23 patients

Destruction and/or removal of large growth of bladder using an endoscope 52240

This procedure involves using a special instrument, an endoscope, to view and treat a large growth in the bladder. The growth is either destroyed or removed to alleviate symptoms and prevent further complications. It's a minimally invasive technique, enhancing recovery.

23 services21 patients

Exam with injections of chemical for destruction of bladder using an endoscope 52287

This procedure involves the use of a thin, flexible tube with a light (endoscope) for internal examination. A chemical is then injected to help eliminate specific issues in the bladder. It's a standard and safe process.

23 services20 patients

Mri scan of pelvis before and after contrast 72197

An MRI scan of the pelvis before and after contrast is a non-invasive imaging technique. It uses magnetic fields and radio waves to capture detailed images of your lower abdomen. Contrast dye, safe for the body, improves image clarity. This helps detect abnormalities more accurately.

23 services23 patients

Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries A9503

Technetium Tc-99m Medronate is a diagnostic procedure that uses a small amount of radioactive material to examine the health of your bones. It helps to detect bone diseases or abnormalities. The procedure is safe, with the radioactive substance naturally leaving your body after the test.

23 services23 patients

Biopsy of bladder using an endoscope 52204

A biopsy of the bladder using an endoscope is a procedure where a small sample of bladder tissue is collected for testing. An endoscope, a flexible tube with a light and camera, is used to see inside the bladder. This helps to identify any abnormal areas. The procedure helps in the diagnosis of various conditions.

22 services22 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

21 services21 patients

Biofeedback training for bowel or bladder control, initial 15 minutes 90912

Biofeedback training helps manage bowel or bladder control issues. It involves using sensors to monitor specific body functions. The first 15-minute session allows you to understand and control these functions to improve health and performance.

19 services16 patients

Surgical removal of prostate and surrounding lymph nodes using an endoscope 55866

This is a minimally invasive procedure where a small camera (endoscope) is used to remove a gland located in the lower body and nearby small filtering structures. It's done to prevent the spread of unwanted cells and improve overall health.

17 services17 patients

Removal of lymph nodes of both sides of pelvis using an endoscope 38571

This procedure involves using a small camera (endoscope) to view and remove lymph nodes from both sides of your lower torso. Lymph nodes help filter harmful substances from the body. The procedure is done to prevent the spread of certain conditions.

16 services16 patients

Insertion of stent in ureter using an endoscope 52332

This procedure involves placing a small, flexible tube (stent) in your body's drainage system to help urine flow from the kidneys to the bladder. An endoscope, a thin tube with a light and camera, is used for precise placement.

16 services14 patients

Nuclear medicine study of bone and/or joint whole body 78306

A nuclear medicine study of bone and/or joint whole body involves injecting a small amount of radioactive material into your body. This material travels to your bones and emits energy. A special camera captures this energy, creating images of your bones to help identify any abnormalities.

16 services16 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

13 services13 patients

Mri scan of abdomen before and after contrast 74183

An MRI scan of the abdomen before and after contrast provides detailed images of your abdominal organs. Initially, images are taken without a contrast agent. Then, a safe dye is administered, usually via an IV, to highlight certain areas, giving a clearer picture to help diagnose various conditions.

11 services11 patients

Prostate cancer screening; prostate specific antigen test (psa) G0103

Prostate cancer screening involves a simple blood test known as the Prostate Specific Antigen (PSA) test. This test measures the level of PSA in your blood. Higher than normal levels can be an early indication of prostate issues, including cancer. It's a key tool in early detection.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ecu Health Medical Center

Acute Care Hospitals · Greenville, NC

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number340040

Location2100 Stantonsburg RdGreenville, NC 27834 · Pitt County

Emergency services Birthing friendly

Vidant Chowan Hospital

Critical Access Hospitals · Edenton, NC

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number341318

Location211 Virginia RdEdenton, NC 27932 · Chowan County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 27834 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$125.01 typical visit price

range $54.12 – $165.09

Typical copayment $31.25 (range $13.53 – $41.27)

Most-billed visit code 99204

Established Patient

$67.72 typical visit price

range $17.21 – $134.61

Typical copayment $16.93 (range $4.30 – $33.65)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 11

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Insertion tray without drainage bag and without catheter (accessories only) A4310

DME-Medical/Surgical Supplies · category DA000N

3 suppliers20 claims28 services$4.96 avg. paid by Medicare

Insertion tray with drainage bag with indwelling catheter, foley type, two-way latex with coating (teflon, silicone, silicone elastomer or hydrophilic, etc.) A4314

DME-Orthotic Devices · category DF000N

3 suppliers15 claims23 services$21.21 avg. paid by Medicare

Insertion tray with drainage bag with indwelling catheter, foley type, two-way, all silicone A4315

DME-Orthotic Devices · category DF000N

1 supplier11 claims13 services$21.82 avg. paid by Medicare

Lubricant, individual sterile packet, each A4332

DME-Medical/Surgical Supplies · category DA000N

2 suppliers22 claims4,050 services$0.11 avg. paid by Medicare

Urinary catheter anchoring device, adhesive skin attachment, each A4333

DME-Orthotic Devices · category DF000N

2 suppliers27 claims149 services$1.91 avg. paid by Medicare

Indwelling catheter; foley type, two-way latex with coating (teflon, silicone, silicone elastomer, or hydrophilic, etc.), each A4338

DME-Orthotic Devices · category DF000N

5 suppliers47 claims82 services$9.07 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALMA FAYE JENKINS M.D.

Internal Medicine (Gastroenterology)