Dr. Mark K. Detweiler
- Gender: Male
- Experience: 42 years
- Graduated from: Pennsylvania State University College Of Medicine
- Graduation year: 1979
- Sole propriator: No
- NPI: 1548344583
Dr. Mark K. Detweiler M.D.
Gastroenterologist
He is located at 1B Commons Drive Unit 9A in Londonderry, NH 03053. Can help patients with the following: Acute Pain, Bladder Control, Feeding and Swallowing, Influenza, Osteoporosis, Peptic Ulcer. His National Provider Identifier (NPI) number is 1548344583. Appointment can be made via the phone number (603) 818-4712. He is affiliated with 1 practices.
Conditions treated
Dr. Mark Kenneth Detweiler, being an gastroenterologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Mark K. Detweiler.
- Abdominal Pain
- Acute Pain
- Anemia
- Arthritis
- Ascites
- Asthma
- Atherosclerosis
- Autoimmune Hepatitis
- Bad Breath
- Barrett's Esophagus
- Bladder Control
- Bleeding Varices
- Blood in Stool
- Botulism
- Cancer
- Carcinoid Tumor
- Celiac Disease
- Chest Pain
- Childhood Obesity
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Cirrhosis
- Clostridium Difficile Colitis
- Colitis
- Colonoscopy
- Common Cold
- Constipation
- Crohn's Disease
- Cystitis
- Diarrhea
- Diverticulosis
- Edema
- Eosinophilic Esophagitis
- Esophagitis
- Fatty Liver Disease
- Feeding and Swallowing
- Fever
- Food Allergies
- Gallbladder Pain
- Gastric Bypass Surgery
- Gastritis
- Gastroesophageal Reflux Disease (GERD)
- Gastroparesis
- General Care
- Headache
- Heart Disease
- Heartburn
- Helicobacter Pylori Infection
- Hemorrhoids
- Hepatitis A (HAV)
- Hepatitis B (HBV)
- Hepatitis C (HCV)
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Indigestion
- Inflammatory Bowel Disease (IBD)
- Influenza
- Inguinal Hernia
- Internal Bleeding
- Intussusception
- Irritable Bowel Syndrome (IBS)
- Lactose Intolerance
- Leaky Gut Syndrome
- Liver Disease
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Pancreas Divisum
- Pancreatic Cancer
- Pancreatic Cysts
- Pancreatitis
- Peptic Ulcer
- Portal Hypertension
- Prescription Refill
- Primary Biliary Cirrhosis (PBC)
- Primary Sclerosing Cholangitis (PSC)
- Stomach Cancer
- Swallowing Disorders
- Ulcerative Colitis
- Urethritis
- Urinary Tract Infection (UTI)
Procedures Performed by Dr. Mark K. Detweiler
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Mark K. Detweiler as in-network for the following 2026 plans.
Health plans
Anthem Blue Cross and Blue Sheld
Network data as of Sep 10, 2026, as reported by the insurer.
Show all 26 plans from Anthem Blue Cross and Blue Sheld
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Anthem Bronze Preferred Blue PPO 6000/20%/8000 w/HSA | PPO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Preferred Blue PPO 7000/50%/8000 w/HSA | PPO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Preferred Blue PPO 7500/30%/10000 Value | PPO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Preferred Blue PPO 8500/50%/9200 | PPO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 1000/20%/7500 | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 2000/0%/6500 RxD | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 2000/10%/4600 w/HSA | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 2000/10%/7500 | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 2000/20%/4600 w/HSA | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 3000/0%/7500 RxD | PPO · Gold | Participating | Accepting new patients |
| Anthem Gold Preferred Blue PPO 500/30%/9000 | PPO · Gold | Participating | Accepting new patients |
| Anthem Platinum Preferred Blue PPO 250/10%/3500 | PPO · Platinum | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 2500/30%/10000 Value | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 3000/30%/9000 Value | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 3500/20%/10000 | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 3500/20%/7250 w/HSA | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4000/0%/9000 | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4000/0%/9000 RxD | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4000/10%/7250 w/HSA | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4000/20%/8500 | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4000/30%/9000 Value | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 4500/20%/7250 w/HSA | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 5000/0%/8000 w/HSA | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 5000/0%/9000 | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 5000/30%/9000 Value | PPO · Silver | Participating | Accepting new patients |
| Anthem Silver Preferred Blue PPO 6500/0%/9000 RxD | PPO · Silver | Participating | Accepting new patients |
Anthem Blue Cross and Blue Shield
Network data as of Sep 10, 2026, as reported by the insurer.
Show all 64 plans from Anthem Blue Cross and Blue Shield
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Anthem Bronze Access Blue New England HMO 6000/20%/8000 w/HSA | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Access Blue New England HMO 7000/50%/8000 w/HSA | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Access Blue New England HMO 7500/30%/10000 Value | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Access Blue New England HMO 8500/50%/9200 | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X Enhanced 6000/35% HSA | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X Enhanced 7000/0% ($0 Virtual PCP + $0 Select Drugs) | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X Enhanced 7500/50% ($0 Virtual PCP + $0 Select Drugs) Standard | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X HMO 6000/20%/8000 w/HSA | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X HMO 7000/50%/8000 w/HSA | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X HMO 7500/30%/10000 Value | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Bronze Pathway X HMO 8500/50%/9200 | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Catastrophic Pathway X Enhanced | HMO · Catastrophic | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 1000/20%/7500 | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 2000/0%/6500 RxD | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 2000/10%/4600 w/HSA | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 2000/10%/7500 | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 2000/20%/4600 w/HSA | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 3000/0%/7500 RxD | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Access Blue New England HMO 500/30%/9000 | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X Enhanced 1200/20% ($0 Virtual PCP + $0 Select Drugs) | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X Enhanced 2000/25% ($0 Virtual PCP + $0 Select Drug) Standard | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X Enhanced 700/40% ($0 Virtual PCP + $0 Select Drugs) | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 1000/20%/7500 | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 2000/0%/6500 RxD | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 2000/10%/4600 w/HSA | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 2000/10%/7500 | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 2000/20%/4600 w/HSA | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 3000/0%/7500 RxD | HMO · Gold | Participating | Accepting new patients |
| Anthem Gold Pathway X HMO 500/30%/9000 | HMO · Gold | Participating | Accepting new patients |
| Anthem Heart Healthy Bronze Pathway X Enhanced 6000/40% ($0 Virtual PCP + $0 Select Drugs) | HMO · Expanded Bronze | Participating | Accepting new patients |
| Anthem Heart Healthy Silver Pathway X Enhanced 4000/0% ($0 Virtual PCP + $0 Select Drugs) | HMO · Silver | Participating | Accepting new patients |
| Anthem Platinum Access Blue New England HMO 250/10%/3500 | HMO · Platinum | Participating | Accepting new patients |
| Anthem Platinum Pathway X HMO 250/10%/3500 | HMO · Platinum | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 2500/30%/10000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 3000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 3500/20%/10000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 3500/20%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4000/0%/9000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4000/0%/9000 RxD | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4000/10%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4000/20%/8500 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 4500/20%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 5000/0%/8000 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 5000/0%/9000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 5000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Access Blue New England HMO 6500/0%/9000 RxD | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X Enhanced 4500/20% HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X Enhanced 5500/20% ($0 Virtual PCP + $0 Select Drugs) | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X Enhanced 6000/40% ($0 Virtual PCP + $0 Select Drugs) Standard | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 2500/30%/10000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 3000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 3500/20%/10000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 3500/20%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4000/0%/9000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4000/0%/9000 RxD | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4000/10%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4000/20%/8500 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 4500/20%/7250 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 5000/0%/8000 w/HSA | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 5000/0%/9000 | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 5000/30%/9000 Value | HMO · Silver | Participating | Accepting new patients |
| Anthem Silver Pathway X HMO 6500/0%/9000 RxD | HMO · Silver | Participating | Accepting new patients |
Harvard Pilgrim Health Care
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 9 plans from Harvard Pilgrim Health Care
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| NH Local Choice HMO Bronze 8000 + $0 Rx list + $0 Virtual Urgent Care | HMO · Expanded Bronze | Standard | Accepting new patients |
| NH Local Choice HMO Gold + $0 Rx list + $0 Virtual Urgent Care | HMO · Gold | Standard | Accepting new patients |
| NH Local Choice HMO Gold 1400 + $0 Rx list + $0 Virtual Urgent Care | HMO · Gold | Standard | Accepting new patients |
| NH Local Choice HMO HSA Bronze 6000 | HMO · Expanded Bronze | Standard | Accepting new patients |
| NH Local Choice HMO Silver 3500 + $0 Rx list + $0 Virtual Urgent Care | HMO · Silver | Standard | Accepting new patients |
| NH Local Choice HMO Silver 5000 + $0 Rx list + $0 Virtual Urgent Care | HMO · Silver | Standard | Accepting new patients |
| NH Local HMO Bronze 7500 Standard + $0 Rx list + $0 Virtual Urgent Care | HMO · Expanded Bronze | Standard | Accepting new patients |
| NH Local HMO Gold 2000 Standard + $0 Rx list + $0 Virtual Urgent Care | HMO · Gold | Standard | Accepting new patients |
| NH Local HMO Silver 6000 Standard + $0 Rx list + $0 Virtual Urgent Care | HMO · Silver | Standard | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Mark K. Detweiler is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Mark K. Detweiler is enrolled to bill Medicare as a Practitioner - Gastroenterology .
Bills through: Londonderry Gastroenterology Associates Pa
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Merck | $221 |
| Prometheus Laboratories | $68 |
| Gilead Sciences | $15 |
Other
| Food and Beverage | $345 |
Studies
PENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated in 1979Additional Specialities
- Internist
- Specialist
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Questions & Answers
Where can you meet with Dr. Mark Kenneth Detweiler?
Dr. Mark Kenneth Detweiler's office is located at 1B Commons Drive Unit 9A in Londonderry, NH 03053.
Does Dr. Mark Kenneth Detweiler accept patients with Anthem Blue Cross and Blue Shield?
Yes, Dr. Mark Kenneth Detweiler is listed in-network for Anthem Blue Cross and Blue Shield through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
What conditions does Dr. Mark Kenneth Detweiler treat?
Dr. Mark Kenneth Detweiler provides treatment for Acute Pain, Bladder Control, Feeding and Swallowing, Influenza, Osteoporosis, Peptic Ulcer. For the full list see this list.
Does Dr. Mark Kenneth Detweiler have affiliation with practices?
Dr. Mark Kenneth Detweiler is affiliated with Londonderry Gastroenterology Associates PA.