A collection of organizations providing health information arranged by topic. Also available in alphabetical order.
Pacemakers and Implantable Defibrillators
Paget's Disease of Bone
- American College of Rheumatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
- National Institutes of Health Osteoporosis and Related Bone Diseases~National Resource Center (National Institute of Arthritis and Musculoskeletal and Skin Diseases)
Pain
- American Academy of Pain Medicine
- American Pain Society
- National Institute of Neurological Disorders and Stroke
- NIH Pain Consortium
Pain Relievers
Palliative Care
- American Academy of Hospice and Palliative Medicine
- Center to Advance Palliative Care
- Hospice and Palliative Nurses Association
- National Hospice and Palliative Care Organization
- National Institute of Nursing Research
Pancreas Transplantation
- American Society of Transplantation
- National Institute of Diabetes and Digestive and Kidney Diseases
Pancreatic Cancer
- American Cancer Society
- National Cancer Institute
- National Pancreas Foundation
- Pancreatic Cancer Action Network
Pancreatic Diseases
- American Gastroenterological Association
- National Institute of Diabetes and Digestive and Kidney Diseases
- National Pancreas Foundation
- Shwachman-Diamond Syndrome Foundation
Pancreatitis
- American Gastroenterological Association
- National Institute of Diabetes and Digestive and Kidney Diseases
- National Pancreas Foundation
Panic Disorder
Paralysis
- Children's Hemiplegia and Stroke Association
- National Institute of Neurological Disorders and Stroke
- Paralyzed Veterans of America
Parasitic Diseases
Parathyroid Disorders
- American Association of Clinical Endocrinologists
- National Institute of Diabetes and Digestive and Kidney Diseases
Parenting
- KidsHealth (Nemours Foundation)
- National Institute of Child Health and Human Development
Parkinson's Disease
- Michael J. Fox Foundation for Parkinson's Research
- National Institute of Neurological Disorders and Stroke
- National Parkinson Foundation, Inc.
- Parkinson's Disease Foundation
Patient Rights
- Agency for Healthcare Research and Quality
- Department of Health and Human Services, Office for Civil Rights
Patient Safety
Pelvic Inflammatory Disease
Pelvic Pain
- National Institute of Child Health and Human Development
- National Institute of Diabetes and Digestive and Kidney Diseases
Pelvic Support Problems
- American College of Obstetricians and Gynecologists
- American Society of Colon and Rectal Surgeons
- American Urogynecologic Society
- National Institute of Diabetes and Digestive and Kidney Diseases
- Society of Gynecologic Surgeons
Pemphigus
- American Academy of Dermatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Peptic Ulcer
- American College of Gastroenterology
- American Gastroenterological Association
- Centers for Disease Control and Prevention
- National Institute of Diabetes and Digestive and Kidney Diseases
Pericardial Disorders
Peripheral Arterial Disease
- American Heart Association
- National Heart, Lung, and Blood Institute
- Society of Interventional Radiology
Peripheral Nerve Disorders
- American Chronic Pain Association
- Foundation for Peripheral Neuropathy
- National Institute of Neurological Disorders and Stroke
Peritoneal Disorders
Personal Health Records
- American Health Information Management Association
- Department of Health and Human Services, Office for Civil Rights
- HealthIT.gov (Office of the National Coordinator for Health Information Technology)
Personality Disorders
Pesticides
- National Institute of Environmental Health Sciences
- National Pesticide Information Center (Environmental Protection Agency, Oregon State University)
Pet Health
- American Veterinary Medical Association
- Centers for Disease Control and Prevention
- Morris Animal Foundation
Phenylketonuria
- March of Dimes Birth Defects Foundation
- National Institute of Child Health and Human Development
- National PKU News
- Save Babies through Screening Foundation
Pheochromocytoma
Phobias
Piercing and Tattoos
- American Academy of Dermatology
- American Society for Dermatologic Surgery
- American Society of Plastic Surgeons
Pinkeye
Pinworms
Pituitary Disorders
- American Association of Clinical Endocrinologists
- National Institute of Child Health and Human Development
- National Institute of Diabetes and Digestive and Kidney Diseases
- National Institute of Neurological Disorders and Stroke
Pituitary Tumors
- American Association of Clinical Endocrinologists
- National Cancer Institute
- National Institute of Child Health and Human Development
- National Institute of Diabetes and Digestive and Kidney Diseases
- National Institute of Neurological Disorders and Stroke
Plague
- Centers for Disease Control and Prevention
- National Institute of Allergy and Infectious Diseases
- World Health Organization
Plastic and Cosmetic Surgery
- American Academy of Facial Plastic and Reconstructive Surgery
- American Society for Dermatologic Surgery
- American Society of Plastic Surgeons
Platelet Disorders
Pleural Disorders
Pneumococcal Infections
- Centers for Disease Control and Prevention
- National Foundation for Infectious Diseases
- National Institute of Allergy and Infectious Diseases
Pneumocystis Infections
- AIDSinfo (Department of Health and Human Services)
- Centers for Disease Control and Prevention
- National Institute of Allergy and Infectious Diseases
Pneumonia
- American Lung Association
- National Heart, Lung, and Blood Institute
- National Institute of Allergy and Infectious Diseases
Poison Ivy, Oak, and Sumac
- American Academy of Dermatology
- National Institute of Allergy and Infectious Diseases
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Poisoning
- American Association of Poison Control Centers
- American College of Medical Toxicology
- Centers for Disease Control and Prevention
- Consumer Product Safety Commission
- National Institute of Environmental Health Sciences
Polio and Post-Polio Syndrome
- National Institute of Allergy and Infectious Diseases
- National Institute of Neurological Disorders and Stroke
- Post-Polio Health International including International Ventilator Users Network
- World Health Organization
Polycystic Ovary Syndrome
- American College of Obstetricians and Gynecologists
- National Institute of Child Health and Human Development
- womenshealth.gov (Department of Health and Human Services, Office on Women's Health)
Polymyalgia Rheumatica
- American College of Rheumatology
- Arthritis Foundation
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Porphyria
Post-Traumatic Stress Disorder
- Defense Centers of Excellence for Psychological Health & Traumatic Brain Injury
- International Society for Traumatic Stress Studies
- National Center for PTSD
- National Child Traumatic Stress Network
- National Institute of Mental Health
- Sidran Institute
Postpartum Care
- American College of Obstetricians and Gynecologists
- National Institute of Child Health and Human Development
- Postpartum Support International
Postpartum Depression
Potassium
- Academy of Nutrition and Dietetics
- Food and Drug Administration
- Food and Nutrition Information Center
- National Institutes of Health, Office of Dietary Supplements
Prader-Willi Syndrome
Preconception Care
- American College of Obstetricians and Gynecologists
- March of Dimes Birth Defects Foundation
- National Institute of Child Health and Human Development
- womenshealth.gov (Department of Health and Human Services, Office on Women's Health)
Prediabetes
- American Diabetes Association
- National Diabetes Education Program
- National Institute of Diabetes and Digestive and Kidney Diseases
Pregnancy
- American College of Obstetricians and Gynecologists
- March of Dimes Birth Defects Foundation
- National Institute of Child Health and Human Development
- Society for Maternal-Fetal Medicine
- womenshealth.gov (Department of Health and Human Services, Office on Women's Health)
Pregnancy and Medicines
- Centers for Disease Control and Prevention
- March of Dimes Birth Defects Foundation
- MotherToBaby (Organization of Teratology Information Specialists)
- National Institute of Child Health and Human Development
Pregnancy and Nutrition
- Academy of Nutrition and Dietetics
- Center for Nutrition Policy and Promotion
- National Institute of Child Health and Human Development
Pregnancy and Substance Abuse
- Centers for Disease Control and Prevention
- March of Dimes Birth Defects Foundation
- National Institute on Alcohol Abuse and Alcoholism
- National Institute on Drug Abuse
Premature Babies
- American Academy of Pediatrics
- KidsHealth (Nemours Foundation)
- March of Dimes Birth Defects Foundation
- National Institute of Child Health and Human Development
- Nemours Foundation
Premature Ovarian Failure
Premenstrual Syndrome
- American College of Obstetricians and Gynecologists
- womenshealth.gov (Department of Health and Human Services, Office on Women's Health)
Prenatal Care
- Health Resources and Services Administration
- March of Dimes Birth Defects Foundation
- National Institute of Child Health and Human Development
- womenshealth.gov (Department of Health and Human Services, Office on Women's Health)
Prenatal Testing
Prescription Drug Abuse
- Drug Enforcement Administration
- Food and Drug Administration
- National Institute on Drug Abuse
- Partnership at Drugfree.org (Partnership for a Drug-Free America)
Pressure Sores
Progressive Supranuclear Palsy
- Foundation for PSP/CBD and Related Brain Diseases
- National Institute of Neurological Disorders and Stroke
Prostate Cancer
- American Cancer Society
- Center for Prostate Disease Research
- National Cancer Institute
- Prostate Cancer Foundation
Prostate Cancer Screening
Prostate Diseases
- Center for Prostate Disease Research
- National Institute of Diabetes and Digestive and Kidney Diseases
- National Institute on Aging
Psoriasis
- American Academy of Dermatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
- National Psoriasis Foundation
Psoriatic Arthritis
- American Academy of Dermatology
- American College of Rheumatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
- National Psoriasis Foundation
Psychotic Disorders
- American Psychiatric Association
- American Psychological Association
- NAMI
- National Institute of Mental Health
Puberty
- American Academy of Pediatrics
- KidsHealth (Nemours Foundation)
- National Institute of Child Health and Human Development
Pulmonary Embolism
Pulmonary Fibrosis
- American College of Chest Physicians
- American Lung Association
- American Thoracic Society
- National Heart, Lung, and Blood Institute
- National Jewish Health
- Pulmonary Fibrosis Foundation
Pulmonary Hypertension
- American Heart Association
- American Lung Association
- National Heart, Lung, and Blood Institute
- Pulmonary Hypertension Association