DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

G56 Mononeuropathies of upper limb

  • Header · not billable

G56 is not billable. The category heads 28 billable codes in FY2027, grouped under 7 subdivisions.

Index → code

  • Causalgia (upper limb) → G56.4-
  • Syndromecarpal tunnel → G56.0-
  • Mononeuritisupper limb → G56.9-

Where it sits

  1. Chapter 6 Diseases of the nervous system (G00-G99)
  2. G50-G59 Nerve, nerve root and plexus disorders (G50-G59)
  3. G56 Mononeuropathies of upper limb
Billable codes
28
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
43

Codes in G56

  1. G56.0
    Carpal tunnel syndrome
    Header
  2. G56.00
    Carpal tunnel syndrome, unspecified upper limb
    Billable
  3. G56.01
    Carpal tunnel syndrome, right upper limb
    Billable
  4. G56.02
    Carpal tunnel syndrome, left upper limb
    Billable
  5. G56.03
    Carpal tunnel syndrome, bilateral upper limbs
    Billable
  6. G56.1
    Other lesions of median nerve
    Header
  7. G56.10
    Other lesions of median nerve, unspecified upper limb
    Billable
  8. G56.11
    Other lesions of median nerve, right upper limb
    Billable
  9. G56.12
    Other lesions of median nerve, left upper limb
    Billable
  10. G56.13
    Other lesions of median nerve, bilateral upper limbs
    Billable
  11. G56.2
    Lesion of ulnar nerve
    Header
    Inclusion terms 1

    Inclusion terms

    • Tardy ulnar nerve palsy
  12. G56.20
    Lesion of ulnar nerve, unspecified upper limb
    Billable
  13. G56.21
    Lesion of ulnar nerve, right upper limb
    Billable
  14. G56.22
    Lesion of ulnar nerve, left upper limb
    Billable
  15. G56.23
    Lesion of ulnar nerve, bilateral upper limbs
    Billable
  16. G56.3
    Lesion of radial nerve
    Header
  17. G56.30
    Lesion of radial nerve, unspecified upper limb
    Billable
  18. G56.31
    Lesion of radial nerve, right upper limb
    Billable
  19. G56.32
    Lesion of radial nerve, left upper limb
    Billable
  20. G56.33
    Lesion of radial nerve, bilateral upper limbs
    Billable
  21. G56.4
    Causalgia of upper limb
    Header
    Inclusion terms 1, Excludes1 5

    Inclusion terms

    • Complex regional pain syndrome II of upper limb

    Excludes1

    • complex regional pain syndrome I of lower limb (G90.52-) G90.52
    • complex regional pain syndrome I of upper limb (G90.51-) G90.51
    • complex regional pain syndrome II of lower limb (G57.7-) G57.7
    • reflex sympathetic dystrophy of lower limb (G90.52-) G90.52
    • reflex sympathetic dystrophy of upper limb (G90.51-) G90.51
  22. G56.40
    Causalgia of unspecified upper limb
    Billable
  23. G56.41
    Causalgia of right upper limb
    Billable
  24. G56.42
    Causalgia of left upper limb
    Billable
  25. G56.43
    Causalgia of bilateral upper limbs
    Billable
  26. G56.8
    Other specified mononeuropathies of upper limb
    Header
    Inclusion terms 1

    Inclusion terms

    • Interdigital neuroma of upper limb
  27. G56.80
    Other specified mononeuropathies of unspecified upper limb
    Billable
  28. G56.81
    Other specified mononeuropathies of right upper limb
    Billable
  29. G56.82
    Other specified mononeuropathies of left upper limb
    Billable
  30. G56.83
    Other specified mononeuropathies of bilateral upper limbs
    Billable
  31. G56.9
    Unspecified mononeuropathy of upper limb
    Header
  32. G56.90
    Unspecified mononeuropathy of unspecified upper limb
    Billable
  33. G56.91
    Unspecified mononeuropathy of right upper limb
    Billable
  34. G56.92
    Unspecified mononeuropathy of left upper limb
    Billable
  35. G56.93
    Unspecified mononeuropathy of bilateral upper limbs
    Billable

Sources of each column.

Instructions

At G56

Excludes1

  • current traumatic nerve disorder - see nerve injury by body region

Notes that also apply

Block G50-G59 instructions (Excludes1 5): printed on the block page.

Chapter 6 instructions (Excludes2 8): printed on the chapter 6 page.

Index entries

  • Causalgia (upper limb) → G56.4-
  • Syndromecarpal tunnel → G56.0-
  • Mononeuritismedian nerve → G56.1-
  • Neuritis (rheumatoid)thenar (median) → G56.1-
  • Neuropathy, neuropathicmedian nerve → G56.1-
  • Palsymedian nerve (tardy) → G56.1-
  • Paralysis, paralytic (complete) (incomplete)median nerve → G56.1-
  • Mononeuritisulnar nerve → G56.2-
  • Neuropathy, neuropathiculnar nerve → G56.2-
  • Palsyulnar nerve (tardy) → G56.2-
  • Paralysis, paralytic (complete) (incomplete)ulnar nerve → G56.2-
  • Mononeuritisradial nerve → G56.3-
  • Palsyradial nerve (acute) → G56.3-
  • Paralysis, paralytic (complete) (incomplete)radial nerve → G56.3-
  • Paralysis, paralytic (complete) (incomplete)phrenic nerve → G56.8-
  • Paralysis, paralytic (complete) (incomplete)subscapularis → G56.8-
  • Mononeuritisupper limb → G56.9-
  • Mononeuropathyupper limb → G56.9-
  • Neuropathy, neuropathicarm → G56.9-
  • Neuropathy, neuropathicaxillary → G56.9-
  • Paralysis, paralytic (complete) (incomplete)finger → G56.9-
  • Paralysis, paralytic (complete) (incomplete)musculocutaneous nerve → G56.9-
  • Paralysis, paralytic (complete) (incomplete)musculospiral → G56.9-
  • Paralysis, paralytic (complete) (incomplete)shoulder → G56.9-
  • Paralysis, paralytic (complete) (incomplete)thumb → G56.9-
  • Paralysis, paralytic (complete) (incomplete)triceps brachii → G56.9-
  • Paralysis, paralytic (complete) (incomplete)wrist → G56.9-
  • Neuropathy, neuropathicentrapmentmedian nerve → G56.0-
  • Lesion(s) (nontraumatic)nervemedian → G56.1-
  • Lesion(s) (nontraumatic)nerveulnar → G56.2-
  • Neuropathy, neuropathicentrapmentulnar nerve → G56.2-
  • Paralysis, paralytic (complete) (incomplete)nerveulnar → G56.2-
  • Lesion(s) (nontraumatic)nerveradial → G56.3-
  • Paralysis, paralytic (complete) (incomplete)nerveradial → G56.3-
  • Mononeuritisupper limbspecified nerve NEC → G56.8-
  • Mononeuropathyupper limbspecified site NEC → G56.8-
  • Neuromainterdigitalupper limb → G56.8-
  • Neuromanonneoplasticarm → G56.9-
  • Neuromanonneoplasticupper extremity → G56.9-
  • Neuromasurgical (nonneoplastic)arm → G56.9-

3 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy