DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 13

M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)

Block M26-M27 groups 2 categories with 94 billable codes in FY2027.

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)

Neighbouring blocks

Categories
2
Billable codes
94
CC codes
0
MCC codes
0
HCC V28 codes
0
New FY2027
0

Categories in M26-M27

  • M26

    Dentofacial anomalies [including malocclusion]

    Macrogenia → M26.05

    • 78 billable codes
  • M27

    Other diseases of jaws

    Cherubism → M27.8

    • 16 billable codes

Index main terms

  • Anomaly, anomalous (congenital) (unspecified type) → M26 (45 entries)
  • Failure, failed → M27 (18 entries)
  • Cyst (colloid) (mucous) (simple) (retention) → M27 (15 entries)
  • Hyperplasia, hyperplastic → M26, M27 (12 entries)
  • Hypoplasia, hypoplastic → M26, M27 (12 entries)
  • Malocclusion (teeth) → M26 (9 entries)
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) → M27 (8 entries)
  • Sprain (joint) (ligament) → M26 (7 entries)
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) → M27 (5 entries)
  • Disease, diseased → M27 (5 entries)
  • Deformity → M26, M27 (4 entries)
  • Excess, excessive, excessively → M26 (4 entries)
  • Granuloma → M27 (4 entries)
  • Occlusion, occluded → M26 (4 entries)
  • Periostitis (albuminosa) (circumscribed) (diffuse) (infective) (monomelic) → M27 (4 entries)

+101 more main terms; the search box finds them by word.

Block instructions

Excludes1

  • hemifacial atrophy or hypertrophy (Q67.4) Q67.4
  • unilateral condylar hyperplasia or hypoplasia (M27.8) M27.8

Notes that also apply

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.