| Other concept | Connection | Concept | Identifier |
|---|
| Abdominal Cramps | source | DXplain, 1994 | U000026 |
| Abdomen distended | source | DXplain, 1994 | U000005 |
| Abdominal mass | source | DXplain, 1994 | U000012 |
| Abdominal Pain | source | DXplain, 1994 | U000023 |
| Abetalipoproteinemia | source | DXplain, 1994 | U000001 |
| Spontaneous abortion | source | DXplain, 1994 | U000006 |
| Missed abortion | source | DXplain, 1994 | U000004 |
| Abortion, Septic | source | DXplain, 1994 | U000005 |
| Threatened abortion | source | DXplain, 1994 | U000007 |
| Abruptio Placentae | source | DXplain, 1994 | |
| Acanthocytes | source | DXplain, 1994 | U003790 |
| Acanthosis Nigricans | source | DXplain, 1994 | |
| Achondroplasia | source | DXplain, 1994 | U000021 |
| Acidosis | source | DXplain, 1994 | U000077 |
| Acidosis, Lactic | source | DXplain, 1994 | U002315 |
| Renal tubular acidosis | source | DXplain, 1994 | U000024 |
| Acidosis, Respiratory | source | DXplain, 1994 | U003359 |
| Acromegaly | source | DXplain, 1994 | |
| Actinomycosis | source | DXplain, 1994 | U000032 |
| Acute atopic conjunctivitis | source | DXplain, 1994 | |
| Acute laryngitis NOS | source | DXplain, 1994 | U001008 |
| Acute pancreatitis unspecified | source | DXplain, 1994 | U001401 |
| Acute tonsillitis NOS | source | DXplain, 1994 | U001884 |
| Acute vascular insufficiency of intestine (disorder) | source | DXplain, 1994 | U001171 |
| Massive Hepatic Necrosis | source | DXplain, 1994 | U001080 |
| Adams-Stokes Syndrome | source | DXplain, 1994 | |
| Addison's disease | source | DXplain, 1994 | |
| Adenovirus Infections | source | DXplain, 1994 | |
| Adiposis Dolorosa | source | DXplain, 1994 | U000042 |
| Adrenal gland hypofunction | source | DXplain, 1994 | U000092 |
| Adrenal Gland Neoplasms | source | DXplain, 1994 | U000093 |
| Congenital adrenal hyperplasia | source | DXplain, 1994 | |
| Adrenalectomy | source | DXplain, 1994 | U000094 |
| Afferent Loop Syndrome | source | DXplain, 1994 | U000052 |
| Afibrinogenemia | source | DXplain, 1994 | U000618 |
| Elderly | source | DXplain, 1994 | U001105 |
| Ageusia | source | DXplain, 1994 | |
| Aggressive behavior | source | DXplain, 1994 | U000109 |
| Primary Myelofibrosis | source | DXplain, 1994 | |
| Agnosia | source | DXplain, 1994 | U000111 |