Internal Medicine Acronyms

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Internal Medicine Alphabet P

S. No	Acronyms	Full Form	Short Explanation	Practical Example
P001	PAC	Premature Atrial Contraction	Early heartbeat originating in atria	ECG shows PAC in palpitations
P002	PACU	Post-Anesthesia Care Unit	Recovery area after anesthesia	Patient monitored in PACU post-surgery
P003	PAD	Peripheral Artery Disease	Narrowing of arteries in limbs	PAD patient presents with claudication
P004	PAH	Pulmonary Arterial Hypertension	High blood pressure in lung arteries	PAH treated with sildenafil
P005	PALS	Pediatric Advanced Life Support	Emergency protocol for children	PALS used in pediatric cardiac arrest
P006	PAN	Polyarteritis Nodosa	Rare vasculitis affecting medium arteries	PAN diagnosed by angiography
P007	PAP	Papanicolaou Test	Cervical cancer screening	PAP smear detects precancerous changes
P008	PAPR	Powered Air-Purifying Respirator	Protective device for healthcare staff	PAPR used in infectious disease units
P009	PAR	Partial Androgen Resistance	Endocrine disorder	PAR evaluated in intersex conditions
P010	PAS	Pulmonary Alveolar Sarcoidosis	Granulomatous lung disease	PAS confirmed with biopsy
P011	PAT	Paroxysmal Atrial Tachycardia	Sudden rapid atrial arrhythmia	PAT managed with adenosine
P012	PAWP	Pulmonary Artery Wedge Pressure	Cardiac filling pressure measure	PAWP monitored in heart failure
P013	PBC	Primary Biliary Cholangitis	Chronic autoimmune liver disease	PBC treated with ursodiol
P014	PBD	Postoperative Bile Duct Injury	Surgical complication	PBD recognized via imaging
P015	PBI	Protein Bound Iodine	Old thyroid function test	PBI replaced by TSH assay
P016	PBL	Problem-Based Learning	Educational method	PBL sessions in medical school
P017	PBP	Penicillin-Binding Protein	Bacterial enzyme target for antibiotics	PBPs inhibited by β-lactams
P018	PBT	Proton Beam Therapy	Radiation treatment using protons	PBT applied in brain tumors
P019	PC	Packed Cells	Blood transfusion component	PC transfused in anemia
P020	PCA	Patient-Controlled Analgesia	Pain relief system controlled by patient	PCA pump used after surgery
P021	PCD	Primary Ciliary Dyskinesia	Genetic disorder affecting cilia	PCD patient suffers from chronic sinusitis
P022	PCF	Pharyngeal Constriction Function	Swallowing mechanism	PCF assessed in dysphagia
P023	PCI	Percutaneous Coronary Intervention	Catheter-based coronary treatment	PCI performed after STEMI
P024	PCL	Posterior Cruciate Ligament	Knee stabilizing ligament	PCL tear diagnosed by MRI
P025	PCM	Protein-Calorie Malnutrition	Deficiency of protein and energy	PCM common in famine areas
P026	PCMH	Patient-Centered Medical Home	Primary care model	PCMH improves chronic disease management
P027	PCP	Pneumocystis Pneumonia	Opportunistic fungal infection in HIV	PCP treated with TMP-SMX
P028	PCR	Polymerase Chain Reaction	DNA amplification technique	PCR detects COVID-19 RNA
P029	PCS	Post-Concussion Syndrome	Symptoms persisting after head injury	PCS includes headaches and dizziness
P030	PCT	Procalcitonin	Biomarker for bacterial infection	PCT elevated in sepsis
P031	PD	Peritoneal Dialysis	Renal replacement therapy	PD performed in ESRD patients
P032	PDA	Patent Ductus Arteriosus	Congenital heart defect	PDA closed with catheter device
P033	PDD	Persistent Depressive Disorder	Chronic form of depression	PDD treated with psychotherapy
P034	PDE	Phosphodiesterase	Enzyme family with many roles	PDE5 inhibitors used in ED
P035	PDF	Portable Document Format	Medical documents format	Discharge summary shared in PDF
P036	PDR	Physician’s Desk Reference	Drug reference guide	PDR consulted for dosing
P037	PE	Pulmonary Embolism	Blood clot in lung arteries	PE suspected in acute dyspnea
P038	PEEP	Positive End-Expiratory Pressure	Ventilation setting preventing alveolar collapse	PEEP adjusted in ARDS
P039	PEG	Percutaneous Endoscopic Gastrostomy	Feeding tube placement	PEG inserted in dysphagia
P040	PEJ	Percutaneous Endoscopic Jejunostomy	Jejunum feeding tube	PEJ placed in severe reflux
P041	PET	Positron Emission Tomography	Imaging for metabolic activity	PET scan detects cancer spread
P042	PF	Pulmonary Fibrosis	Chronic scarring of lung tissue	PF causes progressive breathlessness
P043	PFO	Patent Foramen Ovale	Congenital atrial septal opening	PFO linked to stroke risk
P044	PFR	Peak Flow Rate	Maximal expiratory airflow	PFR measured in asthma monitoring
P045	PFT	Pulmonary Function Test	Lung capacity and function test	PFT used in COPD diagnosis
P046	PG	Prostaglandin	Inflammatory mediator	PG analogs used in glaucoma
P047	PGB	Pregabalin	Neuropathic pain medication	PGB prescribed in fibromyalgia
P048	PGD	Preimplantation Genetic Diagnosis	Embryo genetic testing	PGD prevents hereditary diseases
P049	PGI2	Prostacyclin	Vasodilator and platelet inhibitor	PGI2 infusion used in PAH
P050	PGP	P-glycoprotein	Drug efflux transporter	PGP overexpression causes chemo resistance

S. No	Acronyms	Full Form	Short Explanation	Practical Example
P051	PH	Pulmonary Hypertension	High blood pressure in lungs	PH treated with vasodilators
P052	PHA	Primary Hyperaldosteronism	Excess aldosterone from adrenal glands	PHA causes hypertension and hypokalemia
P053	PHC	Primary Health Care	Basic medical care	PHC provided at community clinics
P054	PHD	Public Health Department	Government health authority	PHD monitors infectious disease outbreaks
P055	PHE	Public Health Emergency	Sudden health crisis	PHE declared for pandemic response
P056	PHN	Postherpetic Neuralgia	Pain after shingles	PHN managed with gabapentin
P057	PHQ-9	Patient Health Questionnaire-9	Depression screening tool	PHQ-9 used in primary care
P058	PI	Principal Investigator	Lead researcher in study	PI manages clinical trial
P059	PICC	Peripherally Inserted Central Catheter	Long-term IV access	PICC line used for chemotherapy
P060	PID	Pelvic Inflammatory Disease	Infection of female reproductive organs	PID treated with antibiotics
P061	PIF	Peak Inspiratory Flow	Maximal inhalation rate	PIF measured in asthma patients
P062	PJP	Pneumocystis jirovecii Pneumonia	Opportunistic fungal lung infection	PJP treated in HIV patients
P063	PK	Pharmacokinetics	Drug absorption, distribution, metabolism	PK study guides dosing
P064	PKD	Polycystic Kidney Disease	Genetic kidney disorder	PKD monitored with ultrasound
P065	PLA2	Phospholipase A2	Enzyme involved in inflammation	PLA2 elevated in rheumatoid arthritis
P066	PLC	Primary Liver Cancer	Hepatic malignancy	PLC diagnosed via imaging and biopsy
P067	PLR	Platelet-to-Lymphocyte Ratio	Inflammatory marker	PLR elevated in sepsis
P068	PM	Preventive Medicine	Medical specialty	PM includes vaccination programs
P069	PMA	Premarket Approval	Regulatory approval for medical devices	PMA granted for new pacemaker
P070	PMH	Past Medical History	Patient’s previous illnesses	PMH reviewed during clinic visit
P071	PMI	Point of Maximal Impulse	Heart apex beat location	PMI checked in cardiac exam
P072	PMN	Polymorphonuclear Leukocyte	Type of white blood cell	PMN count increased in infection
P073	PO	Per Os (by mouth)	Oral administration of medication	Drug given PO twice daily
P074	PO2	Partial Pressure of Oxygen	Blood oxygen measurement	PO2 measured in arterial blood gas
P075	POD	Postoperative Day	Days after surgery	POD 3 patient recovering well
P076	POMR	Problem-Oriented Medical Record	Patient chart system	POMR used in hospital documentation
P077	POP	Pelvic Organ Prolapse	Descent of pelvic organs	POP treated surgically or with pessary
P078	PPI	Proton Pump Inhibitor	Acid-suppressing drug	PPI prescribed for GERD
P079	PPN	Peripheral Parenteral Nutrition	IV nutrition via peripheral vein	PPN used in malnourished patients
P080	PR	Per Rectum	Medication route or examination	PR suppository administered for constipation
P081	PRBC	Packed Red Blood Cells	Blood transfusion component	PRBC transfused for anemia
P082	PRN	Pro Re Nata (as needed)	Medication dosing instruction	Analgesic given PRN for pain
P083	PRS	Pediatric Rheumatology Society	Professional society	PRS provides treatment guidelines
P084	PSA	Prostate-Specific Antigen	Marker for prostate disease	PSA elevated in prostate cancer
P085	PSH	Past Surgical History	Patient’s previous surgeries	PSH reviewed before operation
P086	PSI	Pneumonia Severity Index	Risk assessment tool	PSI predicts mortality in pneumonia
P087	PSMA	Prostate-Specific Membrane Antigen	Protein target in prostate cancer	PSMA used in PET imaging
P088	PSP	Progressive Supranuclear Palsy	Neurodegenerative disorder	PSP patient has gaze palsy and falls
P089	PT	Prothrombin Time	Blood coagulation test	PT monitored in warfarin therapy
P090	PTCA	Percutaneous Transluminal Coronary Angioplasty	Coronary artery dilation	PTCA performed for angina
P091	PTD	Preterm Delivery	Birth before 37 weeks	PTD managed in neonatal ICU
P092	PTH	Parathyroid Hormone	Regulates calcium	PTH measured in hyperparathyroidism
P093	PTLD	Post-Transplant Lymphoproliferative Disorder	Lymphoid proliferation after transplant	PTLD diagnosed via biopsy
P094	PTN	Patellar Tendon	Knee ligament	PTN examined in knee injury
P095	PTSD	Post-Traumatic Stress Disorder	Psychiatric disorder after trauma	PTSD therapy includes CBT and meds
P096	PTU	Propylthiouracil	Antithyroid drug	PTU used in hyperthyroidism
P097	PUD	Peptic Ulcer Disease	Gastric or duodenal ulcers	PUD treated with PPI and antibiotics
P098	PUK	Peripheral Ulcerative Keratitis	Eye corneal ulceration	PUK treated with immunosuppressants
P099	PVA	Polyvinyl Alcohol	Component in medical devices	PVA used in contact lenses
P100	PVC	Premature Ventricular Contraction	Early heartbeat from ventricles	PVC noted on ECG monitoring
P101	PVD	Peripheral Vascular Disease	Blood vessel disease in limbs	PVD causes intermittent claudication
P102	PVE	Prosthetic Valve Endocarditis	Infection of heart valve prosthesis	PVE diagnosed with echocardiography
P103	PVL	Periventricular Leukomalacia	Brain white matter injury	PVL seen in preterm infants
P104	PVN	Polyomavirus Nephropathy	Kidney disease in transplant patients	PVN diagnosed via biopsy
P105	PVR	Post-Void Residual	Urinary retention measurement	PVR measured with bladder scan
P106	PVST	Paroxysmal Supraventricular Tachycardia	Rapid atrial arrhythmia	PVST treated with adenosine
P107	PWB	Partial Weight Bearing	Rehabilitation instruction	PWB after lower limb surgery
P108	PWS	Prader-Willi Syndrome	Genetic disorder with obesity and hypotonia	PWS managed with growth hormone
P109	PWT	Physical Work Test	Functional capacity assessment	PWT used in cardiac rehab
P110	PXE	Pseudoxanthoma Elasticum	Genetic connective tissue disorder	PXE causes skin and eye changes
P111	PXR	Pregnane X Receptor	Nuclear receptor affecting drug metabolism	PXR induces CYP450 enzymes
P112	PY	Pyelonephritis	Kidney infection	PY treated with antibiotics
P113	PZA	Pyrazinamide	Anti-tuberculosis drug	PZA included in TB regimen
P114	PZT	Phenytoin Zone Test	Drug level monitoring	PZT guides phenytoin dosing
P115	PA	Physician Assistant	Mid-level medical practitioner	PA performs patient assessments
P116	PABA	Para-Aminobenzoic Acid	Component of folate pathway	PABA studied in drug metabolism
P117	PACS	Picture Archiving and Communication System	Medical imaging storage	PACS used in radiology department
P118	PAF	Platelet-Activating Factor	Inflammatory mediator	PAF elevated in sepsis
P119	PAG	Pre-Axial Gangrene	Tissue necrosis	PAG requires surgical debridement
P120	PAL	Pulmonary Alveolar Lipoproteinosis	Lung surfactant disorder	PAL diagnosed with bronchoalveolar lavage
P121	PAM	Primary Amoebic Meningoencephalitis	Rare brain infection	PAM treated with amphotericin B
P122	PAN	Polyarteritis Nodosa	Systemic vasculitis	PAN treated with immunosuppressants
P123	PAP	Pulmonary Alveolar Proteinosis	Accumulation of surfactant in alveoli	PAP treated with lung lavage
P124	PAR	Paroxysmal Atrial Rhythm	Intermittent atrial arrhythmia	PAR detected on Holter monitor
P125	PAS	Periodic Acid-Schiff	Histology stain for carbohydrates	PAS stain identifies glycogen in biopsy
P126	PAT	Paroxysmal Atrial Tachycardia	Sudden rapid atrial rhythm	PAT treated with adenosine
P127	PAX	Paired Box Gene	Genetic transcription factor	PAX mutations linked to developmental disorders
P128	PB	Packed Blood	Transfusion component	PB given in anemia
P129	PBA	Pseudobulbar Affect	Emotional lability	PBA treated with dextromethorphan/quinidine
P130	PBC	Primary Biliary Cholangitis	Autoimmune liver disease	PBC treated with ursodiol
P131	PBD	Postoperative Bile Duct Injury	Surgical complication	PBD detected via cholangiography
P132	PBI	Protein Bound Iodine	Thyroid function indicator	PBI replaced by TSH measurement
P133	PBMC	Peripheral Blood Mononuclear Cell	Immune cell type	PBMC isolated for immunology study
P134	PBSC	Peripheral Blood Stem Cell	Source for stem cell transplant	PBSC collected for autologous transplant
P135	PC	Packed Cells	Blood transfusion component	PC transfused in anemia
P136	PCA	Patient-Controlled Analgesia	Pain pump controlled by patient	PCA used postoperatively
P137	PCD	Primary Ciliary Dyskinesia	Genetic ciliary disorder	PCD presents with chronic sinusitis
P138	PCF	Pharyngeal Constriction Function	Swallowing function	PCF assessed in dysphagia clinic
P139	PCI	Percutaneous Coronary Intervention	Catheter-based coronary treatment	PCI performed for STEMI
P140	PCL	Posterior Cruciate Ligament	Knee stabilizing ligament	PCL tear confirmed via MRI
P141	PCM	Protein-Calorie Malnutrition	Nutritional deficiency	PCM treated with dietary supplementation
P142	PCMH	Patient-Centered Medical Home	Primary care model	PCMH improves chronic disease management
P143	PCP	Pneumocystis Pneumonia	Opportunistic infection	PCP treated in HIV patients
P144	PCR	Polymerase Chain Reaction	DNA amplification technique	PCR detects viral RNA
P145	PCS	Post-Concussion Syndrome	Persistent symptoms post-head injury	PCS includes headache and dizziness
P146	PCT	Procalcitonin	Biomarker for bacterial infection	PCT elevated in sepsis
P147	PD	Peritoneal Dialysis	Renal replacement therapy	PD performed in ESRD
P148	PDA	Patent Ductus Arteriosus	Congenital heart defect	PDA closed via catheter
P149	PDD	Persistent Depressive Disorder	Chronic depression	PDD managed with therapy and meds
P150	PDE	Phosphodiesterase	Enzyme family with many roles	PDE inhibitors used for erectile dysfunction
P151	PDF	Portable Document Format	Document type	PDF used for sharing reports
P152	PDR	Physician’s Desk Reference	Drug reference book	PDR consulted for dosing
P153	PE	Pulmonary Embolism	Blood clot in lung	PE suspected with acute dyspnea
P154	PEEP	Positive End-Expiratory Pressure	Ventilator setting	PEEP adjusted in ARDS patients
P155	PEG	Percutaneous Endoscopic Gastrostomy	Feeding tube insertion	PEG placed for dysphagia
P156	PEJ	Percutaneous Endoscopic Jejunostomy	Feeding tube in jejunum	PEJ used in severe reflux
P157	PET	Positron Emission Tomography	Imaging technique	PET used in cancer detection
P158	PF	Pulmonary Fibrosis	Chronic lung scarring	PF monitored via HRCT
P159	PFO	Patent Foramen Ovale	Congenital heart defect	PFO closure reduces stroke risk
P160	PFR	Peak Flow Rate	Measure of expiratory airflow	PFR measured in asthma
P161	PFT	Pulmonary Function Test	Lung function assessment	PFT evaluates COPD
P162	PG	Prostaglandin	Inflammatory mediator	PG analog used for glaucoma
P163	PGB	Pregabalin	Neuropathic pain drug	PGB prescribed in fibromyalgia
P164	PGD	Preimplantation Genetic Diagnosis	Embryo genetic testing	PGD prevents hereditary disorders
P165	PGI2	Prostacyclin	Vasodilator and platelet inhibitor	PGI2 infusion used in PAH
P166	PGP	P-glycoprotein	Drug efflux transporter	PGP overexpression causes chemo resistance
P167	PH	Pulmonary Hypertension	High blood pressure in pulmonary arteries	PH managed with vasodilators
P168	PHA	Primary Hyperaldosteronism	Excess aldosterone	PHA causes hypertension and hypokalemia
P169	PHC	Primary Health Care	Basic medical care	PHC at community clinics
P170	PHD	Public Health Department	Government health authority	PHD monitors disease outbreaks
P171	PHE	Public Health Emergency	Sudden health crisis	PHE declared during pandemics
P172	PHN	Postherpetic Neuralgia	Pain after shingles	PHN treated with gabapentin
P173	PHQ-9	Patient Health Questionnaire-9	Depression screening	PHQ-9 used in primary care
P174	PI	Principal Investigator	Lead researcher	PI manages clinical trial
P175	PICC	Peripherally Inserted Central Catheter	Long-term IV line	PICC used for chemotherapy
P176	PID	Pelvic Inflammatory Disease	Infection of female reproductive organs	PID treated with antibiotics
P177	PIF	Peak Inspiratory Flow	Max inhalation rate	PIF measured in asthma
P178	PJP	Pneumocystis jirovecii Pneumonia	Opportunistic fungal infection	PJP treated in HIV
P179	PK	Pharmacokinetics	Drug absorption/metabolism	PK studies guide dosing
P180	PKD	Polycystic Kidney Disease	Genetic kidney disorder	PKD monitored via ultrasound
P181	PLA2	Phospholipase A2	Inflammatory enzyme	PLA2 elevated in RA
P182	PLC	Primary Liver Cancer	Liver malignancy	PLC diagnosed with imaging
P183	PLR	Platelet-to-Lymphocyte Ratio	Inflammatory marker	PLR elevated in sepsis
P184	PM	Preventive Medicine	Medical specialty	PM programs include vaccinations
P185	PMA	Premarket Approval	Device regulatory approval	PMA granted for new pacemaker
P186	PMH	Past Medical History	Patient’s previous illnesses	PMH reviewed in clinic
P187	PMI	Point of Maximal Impulse	Heart apex beat	PMI checked in cardiac exam
P188	PMN	Polymorphonuclear Leukocyte	White blood cell type	PMN count increased in infection
P189	PO	Per Os (by mouth)	Oral administration	Medication given PO twice daily
P190	PO2	Partial Pressure of Oxygen	Blood oxygen measure	PO2 measured in ABG
P191	POD	Postoperative Day	Days after surgery	POD 3 patient recovering
P192	POMR	Problem-Oriented Medical Record	Patient chart system	POMR used in hospital
P193	POP	Pelvic Organ Prolapse	Descent of pelvic organs	POP treated with pessary
P194	PPI	Proton Pump Inhibitor	Acid-suppressing drug	PPI prescribed for GERD
P195	PPN	Peripheral Parenteral Nutrition	IV nutrition	PPN used in malnourished patients
P196	PR	Per Rectum	Medication route or exam	PR suppository administered
P197	PRBC	Packed Red Blood Cells	Blood transfusion	PRBC transfused for anemia
P198	PRN	Pro Re Nata (as needed)	Dosing instruction	Analgesic given PRN
P199	PRS	Pediatric Rheumatology Society	Professional society	PRS provides treatment guidelines
P200	PSA	Prostate-Specific Antigen	Marker for prostate disease	PSA elevated in prostate cancer