| Test Name (Click to sort by popular result) | COE Code |
| PAX/FOXO1 Translocation (Alveolar Rhabdomyosarcoma) | MLABEL |
| PML/RARA t(15;17) Translocation Detection, Qualitative | MLABEL |
| PT (Prothrombin Time) | PT7 |
| PTEN Hamartoma Tumor Syndrome (PHTS) Gene Sequencing | PTENSS |
| PTPN11 Gene Sequencing in Inherited Disorders | PTPNSS |
| PTT (Activated Partial Thromboplastin Time) | PTT |
| Pancreatic Polypeptide | HPP |
| Parainfluenza Antibody | PARAV |
| Paraneoplastic Autoantibody Evaluation | PAEVAL |
| Parasite, Macroscopic Exam | PARA |
| Parathyroid Hormone, Intact | PTHI |
| Parathyroid Related Peptide | PTHRP |
| Parietal Cell Antibody | PAC |
| Paroxetine (Paxil), Serum or Plasma | PAXIL |
| Parvovirus B19 Antibody, IgG | PARVOGT |
| Parvovirus B19 Antibody, IgM | PARVOMT |
| Parvovirus B19 DNA by PCR, Qualitative | PPARV |
| Parvovirus B19 DNA by PCR, Quantitative | VPARVO/VBPARVO |
| Paternity Testing | |
| Pentobarbital | PENTO |
| Phencyclidine, Urine | UPCP/GCMS/PCPG |
| Phenelzine (Nardil) | SL MISC |
| Phenobarbital | PHENO |
| Phenolphthalein, Stool | ML MISC |
| Phenytoin | DIL |
| Phenytoin, Protein Free | FDIL |
| Phosphatidylserine Antibody Panel | ML MISC |
| Phospholipids, Serum | PPL |
| Phosphorus | PHOS |
| Phosphorus, Urine | PHOSU/PHOSQ |
| Pi-Linked Antigen, Blood | ML MISC |
| Pinworm Preparation | PINW |
| Pituitary Tumor Marker, Alpha Subunit | ML MISC |
| Plasmalogen, Erythrocytes | ML MISC |
| Plasminogen Activator Inhibitor-1 Activity | FPAI-1 |
| Plasminogen Activator Inhibitor-1, 4G/5G Genotyping | ML MISC |
| Plasminogen Activity | PLASMINOGE |
| Plasminogen Antigen | ML MISC |
| Platelet Aggregation and Secretion | AGG |
| Platelet Count | PLT |
| Platelet Factor 4 | ML MISC |
| Platelet Function Test, Aspirin | ASPFT |
| Platelet Function Test, Plavix | PLAVIX |
| Pneumocystis DNA by PCR, Qualitative | PCRPCP |
| Point of Care Testing | |
| Poliovirus (Types 1 - 3) Antibody | POLIO |
| Porphobilinogen (PBG), Quantitative, Urine | PBG |
| Porphobilinogen Deaminase (Pbg-D), Erythrocytes | PBGDR |
| Porphyrins, Qualitative Screen, Urine | PORPH |
| Porphyrins, Quantitative, Urine | PORQUN |
| Posaconazole | ML MISC |
| Potassium, Fluid | POTF |
| Potassium, Serum | POT |
| Potassium, Urine | POTU/POTQ |
| Prader-Willi / Angelman Syndrome by PCR | PWSMPS |
| Prealbumin (PAB) | PAB |
| Pregnancy Screen | PRG/PRGU |
| Pregnenolone | PREGNEN |
| Prekallikrein | ML MISC |
| Primidone | PRIM |
| Procainamide | PROC |
| Progesterone | PROG |
| Proinsulin | PINS |
| Prolactin | PRL |
| Propafenone (Rhythmol), Serum | PROPAF |
| Properdin Factor B | ML MISC |
| Propoxyphene, Serum | ML MISC |
| Propoxyphene, Urine | GCMS/PROPG |
| Propranolol, Serum | ML MISC |
| Prostate Cancer Antigen 3 (PCA3) | PCA3 |
| Prostate Specific Antigen | PSA/DPSA |
| Prostate Specific Antigen, Free and Total | PSAFT |
| Prostate Specific Antigen, Super Sensitive | PSASS |
| Prostatic Acid Phosphatase | PAPHOS |
| Protein C Activity | PCA |
| Protein C Antigen | PCAG |
| Protein Electrophoresis, Serum | TPE |
| Protein Electrophoresis, Urine | UPE |
| Protein S Activity | S/FX |
| Protein S Antigen, Free | PSAGF |
| Protein S Antigen, Free with reflex to Total | PSTF |
| Protein, CSF | PRCSF |
| Protein, Fluid | PROTF |
| Protein, Total | PROT |
| Protein, Urine | PROTU/PROTQ |
| Proteinase 3 Antibodies | PR3 |
| Prothrombic Evaluation, patient not on Coumadin | PROTH-NO C |
| Prothrombic Evaluation, patient on Coumadin | PROTH-C |
| Prothrombin 20210 Mutation Detection | MLABEL |
| Protoporphyrins, Fractionation, Erythrocytes | PPFE |
| Protriptyline (Vivactyl) | PROTR |
| Pseudocholinesterase | ML MISC |
| Pseudocholinesterase, Dibucaine Inhibition, Serum | CHED |
| Purkinje Cell Cytoplasmic Antibody, Type 1 | ML MISC |
| Pyrazinamide | SL MISC |
| Pyruvate Kinase (PK), Erythrocytes | ML MISC |
| Pyruvic Acid, Blood | PYRUV |
| pH, Body Fluid | PH |
| pH, Stool | PHSTOOL |
| pH, Urine | PH |
| pH, Whole Blood, Adult | |
| pH, Whole Blood, Pediatric | |