This article needs to be updated. The reason given is: no files for 2006 are listed at the cited source, but files for 2013 are there; NLM releases this information annually. Please help update this article to reflect recent events or newly available information. (February 2020)

The following is a partial list of the "A" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM).

Codes following these are found at List of MeSH codes (A02). For other MeSH codes, see List of MeSH codes.

The source for this content is the set of 2006 MeSH Trees from the NLM.

MeSH  A01 – body regions

MeSH  A01.111 – Anatomic Landmarks

MeSH  A01.236 – breast

• MeSH  A01.236.249 – mammary glands, human
• MeSH  A01.236.500 – nipples

MeSH  A01.378 – extremities

• MeSH  A01.378.100 – amputation stumps
• MeSH  A01.378.610 – lower extremity
  • MeSH  A01.378.610.050 – ankle
  • MeSH  A01.378.610.100 – buttocks
  • MeSH  A01.378.610.250 – foot
    • MeSH  A01.378.610.250.300 – forefoot, human
      • MeSH  A01.378.610.250.300.480 – metatarsus
      • MeSH  A01.378.610.250.300.792 – toes
        • MeSH  A01.378.610.250.300.792.380 – hallux
    • MeSH  A01.378.610.250.510 – heel
  • MeSH  A01.378.610.400 – hip
  • MeSH  A01.378.610.450 – knee
  • MeSH  A01.378.610.500 – leg
  • MeSH  A01.378.610.750 – thigh
• MeSH  A01.378.800 – upper extremity
  • MeSH  A01.378.800.075 – arm
  • MeSH  A01.378.800.090 – axilla
  • MeSH  A01.378.800.420 – elbow
  • MeSH  A01.378.800.585 – forearm
  • MeSH  A01.378.800.667 – hand
    • MeSH  A01.378.800.667.430 – fingers
      • MeSH  A01.378.800.667.430.705 – thumb
    • MeSH  A01.378.800.667.572 – metacarpus
  • MeSH  A01.378.800.750 – shoulder
  • MeSH  A01.378.800.875 – wrist

MeSH  A01.456 – head

• MeSH  A01.456.313 – ear
• MeSH  A01.456.505 – face
  • MeSH  A01.456.505.173 – cheek
  • MeSH  A01.456.505.259 – chin
  • MeSH  A01.456.505.420 – eye
    • MeSH  A01.456.505.420.338 – eyebrows
    • MeSH  A01.456.505.420.504 – eyelids
      • MeSH  A01.456.505.420.504.421 – eyelashes
  • MeSH  A01.456.505.580 – forehead
  • MeSH  A01.456.505.631 – mouth
    • MeSH  A01.456.505.631.515 – lip
  • MeSH  A01.456.505.733 – nose
  • MeSH  A01.456.505.750 – parotid region
  • MeSH  A01.456.505.875 - Superficial Musculoaponeurotic System
• MeSH  A01.456.810 – scalp
• MeSH  A01.456.830 – skull base
  • MeSH  A01.456.830.150 – cranial fossa, anterior
  • MeSH  A01.456.830.165 – cranial fossa, middle
  • MeSH  A01.456.830.200 – cranial fossa, posterior
    • MeSH  A01.456.830.200.500 – Jugular Foramina
  • MeSH  A01.456.830.600 – Infratemporal Fossa
  • MeSH  A01.456.830.800 – Parapharyngeal Space

MeSH  A01.598 – neck

• MeSH  A01.598.250 – Parapharyngeal Space
• MeSH  A01.598.500 – Superficial Musculoaponeurotic System

MeSH  A01.635 – Organs At Risk

MeSH  A01.719 – perineum

MeSH  A01.923 – Torso

• MeSH  A01.923.047 – abdomen
  • MeSH  A01.923.047.025 – abdominal cavity
    • MeSH  A01.923.047.025.600 – peritoneum
      • MeSH  A01.923.047.025.600.225 – Douglas' Pouch
      • MeSH  A01.923.047.025.600.451 – Mesentery
        • MeSH  A01.923.047.025.600.451.535 – Mesocolon
      • MeSH  A01.923.047.025.600.573 – Omentum
      • MeSH  A01.923.047.025.600.678 – Peritoneal Cavity
      • MeSH  A01.923.047.025.600.700 – Peritoneal Stomata
    • MeSH  A01.923.047.025.750 – Retroperitoneal Space
  • MeSH  A01.923.047.050 – abdominal wall
  • MeSH  A01.923.047.365 – groin
  • MeSH  A01.923.047.412 – inguinal canal
  • MeSH  A01.923.047.849 – umbilicus
• MeSH  A01.923.112 – abdominal core
  • MeSH  A01.923.112.125 – abdominal wall
  • MeSH  A01.923.112.250 – diaphragm
  • MeSH  A01.923.112.500 – pelvic floor
• MeSH  A01.923.176 – back
  • MeSH  A01.923.176.519 – Lumbosacral Region
  • MeSH  A01.923.176.780 – Sacrococcygeal Region
• MeSH  A01.923.600 – pelvis
  • MeSH  A01.923.600.500 – lesser pelvis
  • MeSH  A01.923.600.600 – pelvic floor
• MeSH  A01.923.761 – thorax
  • MeSH  A01.923.800 – thoracic cavity
    • MeSH  A01.923.800.500 – Mediastinum
    • MeSH  A01.923.800.650 – Pleural Cavity
  • MeSH  A01.911.850 – thoracic wall

MeSH  A01.935 – Transplant Donor Site

MeSH  A01.941 – Transplants

• MeSH  A01.941.500 – Allografts
  • MeSH  A01.941.500.500 – Allogenic Cells
• MeSH  A01.941.750 – Autografts
• MeSH  A01.941.812 – Bone-Patellar Tendon-Bone Grafts
• MeSH  A01.941.843 – Composite Tissue Allografts
• MeSH  A01.941.875 – Heterografts
• MeSH  A01.941.937 – Isografts

MeSH  A01.947 – Trigger Points

MeSH  A01.960 – viscera

The list continues at List of MeSH codes (A02).