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  • Internal Medicine, Emergency Medicine
  • 39 years of experience
  • Parkland Medical Center 1 Parkland Dr, Derry, NH 03038
  • (603) 432-1500

Brief Intro

Dr. Gretta graduated from the Ohio State University College of Medicine & Public Health in 1986. He works in Derry, NH and 2 other locations and specializes in Emergency Medicine and Internal Medicine. Dr. Gretta is affiliated with Wayne Memorial Hospital.

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Education Background

MEDICAL SCHOOL

Ohio State University College Of Medicine & Public Health - 1986

Location & Hours

  • New England Heart Institute
  • 1 Parkland Dr, Derry, NH 03038

Specialties Treated

  • Emergency Medicine
  • Internal Medicine

Conditions Addressed

  • Acute Upper Respiratory Tract Infections
  • Calculus of the Urinary System
  • Peripheral Nerve Disorders
  • Ischemic Stroke
  • Burns
  • Bronchial Asthma
  • Acute Renal Failure
  • Gastroesophageal Reflux Disease (GERD)
  • Contact Dermatitis
  • Disorders of Lipoid Metabolism
  • Candidiasis
  • Dementia
  • Skin Rash
  • Psoriasis
  • Bacterial Pneumonia
  • Gastrointestinal Hemorrhage
  • Cholelethiasis or Cholecystitis
  • Constipation
  • Herpes Zoster
  • Chronic Bronchitis
  • Anxiety Phobic Disorders
  • Hypertension (HTN)
  • Acute Pancreatitis
  • Skin and Subcutaneous Infections
  • Inflammatory Bowel Disease (IBD)
  • Acute Bronchitis
  • Pneumonia
  • Anemia
  • Acute Sinusitis
  • Sciatica
  • Epilepsy
  • Dehydration
  • Intracranial Injury
  • Schizophrenia
  • Acute Myocardial Infarction (AMI)
  • Cardiac Arrhythmia
  • Atrial Fibrillation and Atrial Flutter
  • Pulmonary Embolism
  • Thoracic Aortic Aneurysm
  • Aortic Valvular Disease
  • Abnormal Vaginal Bleeding
  • Fractures, Dislocations, Derangement, and Sprains
  • Esophagitis
  • Peptic Ulcer Disease
  • Otitis Media
  • Osteoarthritis
  • Gastritis and Duodenitis
  • Urinary Tract Infection (UTI)
  • Acute Pharyngitis
  • Alcohol Dependence
  • Tension Headache
  • Depressive Disorders
  • Diverticulitis
  • Acute Conjunctivitis
  • Heart Failure
  • Hemorrhoids
  • Intestinal Obstruction
  • Viral Pneumonia
  • Diabetes Mellitus (DM)
  • Ischemic Heart Disease
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Procedures Performed

  • Venipuncture

Insurance Accepted

* Insurance information may change frequently. Please verify directly with the provider (doctor/clinic).

  • UnitedHealthcare
  • Oscar Health Insurance
  • Blue Cross Blue Shield
  • Health First Health Plans
  • EmblemHealth
  • CareSource
  • Mutual of Omaha
  • Commonwealth Care Alliance
  • American Healthcare Alliance
  • Humana
  • Medicare
  • Medicaid
  • APWU
  • UniCare
  • Hawaii Medical Service Association (HMSA)
  • STLDentalPlan| LLC
  • Kaiser Permanente
  • SelectHealth
  • Molina Healthcare
  • AmeriHealth
  • AARP
  • Care1st
  • Sierra Health and Life
  • Harvard Pilgrim Health Care
  • UnitedHealthcare Oxford
  • Trusted Health Plan
  • Tufts Health Plan
  • All Savers Insurance
  • Health Alliance
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  • Cancer 3
  • Cardiology, Heart & Vascular Surgery 4
  • Orthopedics 9
  • Neurology & Neurosurgery 7
  • Gastroenterology & GI Surgery 10
  • Pulmonology & Lung Surgery 9
  • Diabetes & Endocrinology 2
  • Children's Hospital 1
  • Urology 7
  • Psychiatry 12
  • Geriatrics 9
  • Rehabilitation 6
  • Obsterics & Gynecology 1
  • Ear, Nose & Throat 1
  • Maternity Care (Uncomplicated Pregnancy) 4