| Hemoglobin | Body fluid | Hematology and Cell counts | LP392460-4 | 1 |
| Hemoglobin | Peritoneal fluid | Hematology and Cell counts | LP392463-8 | 1 |
| Hemoglobin | Pleural fluid | Hematology and Cell counts | LP392465-3 | 1 |
| Hemoglobin | Synovial fluid | Hematology and Cell counts | LP392467-9 | 1 |
| Hemoglobin Barts | LP16418-3 | 1 |
| Hemoglobin Barts | Blood | Hematology and Cell counts | LP393599-8 | 1 |
| Hemoglobin casts | LP31780-7 | 1 |
| Hemoglobin casts | Urine sediment | Urinalysis | LP402440-4 | 1 |
| Hemoglobin E | LP16427-4 | 1 |
| Hemoglobin E | Blood | Hematology and Cell counts | LP393615-2 | 1 |
| Hemoglobinopathies conditions suspected | LP149694-4 | 1 |
| Hemoglobinopathies conditions suspected | DBS | Chemistry - non-challenge | LP407459-9 | 1 |
| Heparan sulfate | DBS | Chemistry - non-challenge | LP386011-3 | 1 |
| Heparan sulfate | Serum or Plasma | Chemistry - non-challenge | LP386012-1 | 1 |
| Heparan sulfate | Urine | Chemistry - non-challenge | LP386013-9 | 1 |
| Heparan-N-sulfatase | LP14028-2 | 1 |
| Heparan-N-sulfatase | White blood cells | Chemistry - non-challenge | LP383046-2 | 1 |
| Heparin dose response slope | LP212283-8 | 1 |
| Heparin dose response slope | Blood | Coagulation | LP393941-2 | 1 |
| Heparin neutralization | LP16000-9 | 1 |
| Heparin neutralization | Blood | Coagulation | LP394259-8 | 1 |
| Heparin unfractionated | LP16002-5 | 1 |
| Heparin unfractionated | Platelet poor plasma | Coagulation | LP394262-2 | 1 |
| Hepatocellular carcinoma risk | LP421240-5 | 1 |
| Hepatocellular carcinoma risk | Patient | Chemistry - non-challenge | LP421849-3 | 1 |
| Heptacarboxylporphyrin I | Stool | Chemistry - non-challenge | LP386456-0 | 1 |
| Heptacarboxylporphyrin III | Stool | Chemistry - non-challenge | LP386458-6 | 1 |
| Heptanoylcarnitine (C7) | LP70091-1 | 1 |
| Heptanoylcarnitine (C7) | DBS | Chemistry - non-challenge | LP381719-6 | 1 |
| Herpes simplex virus | Genital | Microbiology | LP442175-8 | 1 |
| Herpes simplex virus | Vaginal | Microbiology | LP442190-7 | 1 |
| Herpes simplex virus | XXX | Microbiology | LP442192-3 | 1 |
| Herpes simplex virus and Varicella zoster virus | LP124551-5 | 1 |
| Herpes simplex virus and Varicella zoster virus | XXX | Microbiology | LP444676-3 | 1 |
| Herpes simplex virus+Varicella zoster virus | LP30794-9 | 1 |
| Hexacarboxylporphyrin I | Stool | Chemistry - non-challenge | LP386471-9 | 1 |
| Hexacarboxylporphyrin III | Stool | Chemistry - non-challenge | LP386472-7 | 1 |
| Hexadecadienoate (C16:2) | Red Blood Cells | Chemistry - non-challenge | LP382160-2 | 1 |
| Hexadecadienoate (C16:2) | Serum or Plasma | Chemistry - non-challenge | LP382161-0 | 1 |
| Hexadecenoate (C16:1w9) | Red Blood Cells | Chemistry - non-challenge | LP382092-7 | 1 |
| Hexadecenoate (C16:1w9) | Serum or Plasma | Chemistry - non-challenge | LP382093-5 | 1 |
| Hexanoic acids | LP31729-4 | 1 |
| Hexanoylcarnitine (C6) | DBS | Chemistry - non-challenge | LP381694-1 | 1 |
| Hexanoylcarnitine (C6) | Serum or Plasma | Chemistry - non-challenge | LP381697-4 | 1 |
| Hexenoylcarnitine (C6:1) | LP70090-3 | 1 |
| Hexenoylcarnitine (C6:1) | DBS | Chemistry - non-challenge | LP381713-9 | 1 |
| Hexokinase | LP15631-2 | 1 |
| Hexokinase | Red Blood Cells | Chemistry - non-challenge | LP383048-8 | 1 |
| HFE gene | LP19724-1 | 1 |
| HFE gene.p.Cys282Tyr | LP19725-8 | 1 |
| HFE gene.p.Cys282Tyr | Blood or Tissue | Mutations | LP409826-7 | 1 |
| Histidine | Amniotic fluid | Chemistry - non-challenge | LP384006-5 | 1 |
| Histidine | Cerebral spinal fluid | Chemistry - non-challenge | LP384010-7 | 1 |
| Histidine | DBS | Chemistry - non-challenge | LP384008-1 | 1 |
| Histidine | Serum or Plasma | Chemistry - non-challenge | LP384012-3 | 1 |
| Histiocytes | Bone marrow | Hematology and Cell counts | LP393063-5 | 1 |
| HL7 cytogenetics | LP111381-2 | 1 |
| HLA-B*57:01 | LP36049-2 | 1 |
| HLA-B*57:01 | XXX | HLA antigens | LP401211-0 | 1 |
| HLA-B57 | LP36050-0 | 1 |
| Homo-gamma Linolenate (C20:3w6) | LP33075-0 | 1 |
| Homo-gamma Linolenate (C20:3w6) | Serum or Plasma | Chemistry - non-challenge | LP382149-5 | 1 |
| Homocitrulline | Cerebral spinal fluid | Chemistry - non-challenge | LP383847-3 | 1 |
| Homocitrulline | DBS | Chemistry - non-challenge | LP383846-5 | 1 |
| Homocitrulline | Serum or Plasma | Chemistry - non-challenge | LP383848-1 | 1 |
| Homocysteine | Cerebral spinal fluid | Chemistry - non-challenge | LP386294-5 | 1 |
| Homocysteine | DBS | Chemistry - non-challenge | LP386292-9 | 1 |
| Homocysteine | Urine | Chemistry - non-challenge | LP386296-0 | 1 |
| Homocystine | Amniotic fluid | Chemistry - non-challenge | LP386303-4 | 1 |
| Homocystine | Cerebral spinal fluid | Chemistry - non-challenge | LP386306-7 | 1 |
| Homocystine | DBS | Chemistry - non-challenge | LP386304-2 | 1 |
| Homocystine | Serum or Plasma | Chemistry - non-challenge | LP386307-5 | 1 |
| Homovanillate | Cerebral spinal fluid | Chemistry - non-challenge | LP381229-6 | 1 |
| Homovanillate | Serum | Chemistry - non-challenge | LP381230-4 | 1 |
| Homovanillate and Creatinine | LP36805-7 | 1 |
| Homovanillate and Creatinine | Urine | Chemistry - non-challenge | LP416957-1 | 1 |
| Horowitz index | Arterial blood and Inhaled gas | Chemistry - non-challenge | LP386669-8 | 1 |
| Horowitz index | Venous blood and Inhaled gas | Chemistry - non-challenge | LP386672-2 | 1 |
| Howell-Jolly bodies | LP17679-9 | 1 |
| Howell-Jolly bodies | Blood | Hematology and Cell counts | LP393392-8 | 1 |
| Human epididymis protein 4 | LP93517-8 | 1 |
| Human epididymis protein 4 | Serum or Plasma | Chemistry - non-challenge | LP386128-5 | 1 |
| HYDROcodone | LP16161-9 | 1 |
| HYDROcodone | Urine | Drug toxicology | LP389925-1 | 1 |
| HYDROmorphone | LP16162-7 | 1 |
| HYDROmorphone | Urine | Drug toxicology | LP389947-5 | 1 |
| Hydroxyapatite | LP208508-4 | 1 |
| Hydroxyapatite | Urine | Chemistry - non-challenge | LP386720-9 | 1 |
| Hydroxydecanedioate | LP18439-7 | 1 |
| Hydroxydecanedioate | Urine | Chemistry - non-challenge | LP382349-1 | 1 |
| Hydroxylysine | Amniotic fluid | Chemistry - non-challenge | LP384033-9 | 1 |
| Hydroxylysine | Cerebral spinal fluid | Chemistry - non-challenge | LP384036-2 | 1 |
| Hydroxylysine | Serum or Plasma | Chemistry - non-challenge | LP384038-8 | 1 |
| Hydroxyproline | Amniotic fluid | Chemistry - non-challenge | LP384052-9 | 1 |
| Hydroxyproline | Cerebral spinal fluid | Chemistry - non-challenge | LP384055-2 | 1 |
| Hydroxyproline | Serum or Plasma | Chemistry - non-challenge | LP384056-0 | 1 |
| Hyodeoxycholate | LP411050-0 | 1 |
| Hyodeoxycholate | Serum or Plasma | Chemistry - non-challenge | LP416980-3 | 1 |
| Hyperchromia | LP31531-4 | 1 |
| Hyperchromia | Blood | Hematology and Cell counts | LP393444-7 | 1 |