MS-DRG · FY 2026 v43.0

MS-DRG 159 – Dental and Oral Diseases without CC/MCC

A Medical DRG in MDC 03 (Diseases & Disorders of the Ear, Nose, Mouth & Throat). Inpatient cases group to DRG 159 when the ICD-10-CM principal diagnosis is one of the 415 codes listed below and no secondary diagnosis on the CC or MCC lists is present. Its FY 2026 relative weight is 0.7085 with a geometric mean length of stay of 2.1 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.7085
Relative Weight
2.1
Geometric Mean LOS (days)
2.5
Arithmetic Mean LOS (days)
415
Principal Diagnosis Codes

Severity family

DRG 157with MCCWeight 1.7168 · GMLOS 4.5 daysDRG 158with CCWeight 0.9098 · GMLOS 2.8 daysDRG 159without CC/MCCWeight 0.7085 · GMLOS 2.1 days
How a case is assigned to DRG 159

The grouper first assigns the case to MDC 03 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with MCC → 157; with CC → 158; without CC/MCC → 159.

ICD-10-CM

Principal Diagnosis Codes 415 codes · 29 categories

415 of 415 shown
A69 Other spirochetal infections1 code
  • A69.0 Necrotizing ulcerative stomatitis
B00 Herpesviral [herpes simplex] infections1 code
  • B00.2 Herpesviral gingivostomatitis and pharyngotonsillitis
B37 Candidiasis2 codes
D10 Benign neoplasm of mouth and pharynx5 codes
  • D10.0 Benign neoplasm of lip
  • D10.1 Benign neoplasm of tongue
  • D10.2 Benign neoplasm of floor of mouth
  • D10.30 Benign neoplasm of unspecified part of mouth
  • D10.39 Benign neoplasm of other parts of mouth
D16 Benign neoplasm of bone and articular cartilage1 code
  • D16.5 Benign neoplasm of lower jaw bone
K00 Disorders of tooth development and eruption10 codes
  • K00.0 Anodontia
  • K00.1 Supernumerary teeth
  • K00.2 Abnormalities of size and form of teeth
  • K00.3 Mottled teeth
  • K00.4 Disturbances in tooth formation
  • K00.5 Hereditary disturbances in tooth structure, not elsewhere classified
  • K00.6 Disturbances in tooth eruption
  • K00.7 Teething syndrome
  • K00.8 Other disorders of tooth development
  • K00.9 Disorder of tooth development, unspecified
K01 Embedded and impacted teeth2 codes
K02 Dental caries9 codes
  • K02.3 Arrested dental caries
  • K02.51 Dental caries on pit and fissure surface limited to enamel
  • K02.52 Dental caries on pit and fissure surface penetrating into dentin
  • K02.53 Dental caries on pit and fissure surface penetrating into pulp
  • K02.61 Dental caries on smooth surface limited to enamel
  • K02.62 Dental caries on smooth surface penetrating into dentin
  • K02.63 Dental caries on smooth surface penetrating into pulp
  • K02.7 Dental root caries
  • K02.9 Dental caries, unspecified
K03 Other diseases of hard tissues of teeth11 codes
  • K03.0 Excessive attrition of teeth
  • K03.1 Abrasion of teeth
  • K03.2 Erosion of teeth
  • K03.3 Pathological resorption of teeth
  • K03.4 Hypercementosis
  • K03.5 Ankylosis of teeth
  • K03.6 Deposits [accretions] on teeth
  • K03.7 Posteruptive color changes of dental hard tissues
  • K03.81 Cracked tooth
  • K03.89 Other specified diseases of hard tissues of teeth
  • K03.9 Disease of hard tissues of teeth, unspecified
K04 Diseases of pulp and periapical tissues12 codes
  • K04.01 Reversible pulpitis
  • K04.02 Irreversible pulpitis
  • K04.1 Necrosis of pulp
  • K04.2 Pulp degeneration
  • K04.3 Abnormal hard tissue formation in pulp
  • K04.4 Acute apical periodontitis of pulpal origin
  • K04.5 Chronic apical periodontitis
  • K04.6 Periapical abscess with sinus
  • K04.7 Periapical abscess without sinus
  • K04.8 Radicular cyst
  • K04.90 Unspecified diseases of pulp and periapical tissues
  • K04.99 Other diseases of pulp and periapical tissues
K05 Gingivitis and periodontal diseases25 codes
  • K05.00 Acute gingivitis, plaque induced
  • K05.01 Acute gingivitis, non-plaque induced
  • K05.10 Chronic gingivitis, plaque induced
  • K05.11 Chronic gingivitis, non-plaque induced
  • K05.20 Aggressive periodontitis, unspecified
  • K05.211 Aggressive periodontitis, localized, slight
  • K05.212 Aggressive periodontitis, localized, moderate
  • K05.213 Aggressive periodontitis, localized, severe
  • K05.219 Aggressive periodontitis, localized, unspecified severity
  • K05.221 Aggressive periodontitis, generalized, slight
  • K05.222 Aggressive periodontitis, generalized, moderate
  • K05.223 Aggressive periodontitis, generalized, severe
  • K05.229 Aggressive periodontitis, generalized, unspecified severity
  • K05.30 Chronic periodontitis, unspecified
  • K05.311 Chronic periodontitis, localized, slight
  • K05.312 Chronic periodontitis, localized, moderate
  • K05.313 Chronic periodontitis, localized, severe
  • K05.319 Chronic periodontitis, localized, unspecified severity
  • K05.321 Chronic periodontitis, generalized, slight
  • K05.322 Chronic periodontitis, generalized, moderate
  • K05.323 Chronic periodontitis, generalized, severe
  • K05.329 Chronic periodontitis, generalized, unspecified severity
  • K05.4 Periodontosis
  • K05.5 Other periodontal diseases
  • K05.6 Periodontal disease, unspecified
K06 Other disorders of gingiva and edentulous alveolar ridge13 codes
  • K06.010 Localized gingival recession, unspecified
  • K06.011 Localized gingival recession, minimal
  • K06.012 Localized gingival recession, moderate
  • K06.013 Localized gingival recession, severe
  • K06.020 Generalized gingival recession, unspecified
  • K06.021 Generalized gingival recession, minimal
  • K06.022 Generalized gingival recession, moderate
  • K06.023 Generalized gingival recession, severe
  • K06.1 Gingival enlargement
  • K06.2 Gingival and edentulous alveolar ridge lesions associated with trauma
  • K06.3 Horizontal alveolar bone loss
  • K06.8 Other specified disorders of gingiva and edentulous alveolar ridge
  • K06.9 Disorder of gingiva and edentulous alveolar ridge, unspecified
K08 Other disorders of teeth and supporting structures73 codes
  • K08.0 Exfoliation of teeth due to systemic causes
  • K08.101 Complete loss of teeth, unspecified cause, class I
  • K08.102 Complete loss of teeth, unspecified cause, class II
  • K08.103 Complete loss of teeth, unspecified cause, class III
  • K08.104 Complete loss of teeth, unspecified cause, class IV
  • K08.109 Complete loss of teeth, unspecified cause, unspecified class
  • K08.111 Complete loss of teeth due to trauma, class I
  • K08.112 Complete loss of teeth due to trauma, class II
  • K08.113 Complete loss of teeth due to trauma, class III
  • K08.114 Complete loss of teeth due to trauma, class IV
  • K08.119 Complete loss of teeth due to trauma, unspecified class
  • K08.121 Complete loss of teeth due to periodontal diseases, class I
  • K08.122 Complete loss of teeth due to periodontal diseases, class II
  • K08.123 Complete loss of teeth due to periodontal diseases, class III
  • K08.124 Complete loss of teeth due to periodontal diseases, class IV
  • K08.129 Complete loss of teeth due to periodontal diseases, unspecified class
  • K08.131 Complete loss of teeth due to caries, class I
  • K08.132 Complete loss of teeth due to caries, class II
  • K08.133 Complete loss of teeth due to caries, class III
  • K08.134 Complete loss of teeth due to caries, class IV
  • K08.139 Complete loss of teeth due to caries, unspecified class
  • K08.191 Complete loss of teeth due to other specified cause, class I
  • K08.192 Complete loss of teeth due to other specified cause, class II
  • K08.193 Complete loss of teeth due to other specified cause, class III
  • K08.194 Complete loss of teeth due to other specified cause, class IV
  • K08.199 Complete loss of teeth due to other specified cause, unspecified class
  • K08.20 Unspecified atrophy of edentulous alveolar ridge
  • K08.21 Minimal atrophy of the mandible
  • K08.22 Moderate atrophy of the mandible
  • K08.23 Severe atrophy of the mandible
  • K08.24 Minimal atrophy of maxilla
  • K08.25 Moderate atrophy of the maxilla
  • K08.26 Severe atrophy of the maxilla
  • K08.3 Retained dental root
  • K08.401 Partial loss of teeth, unspecified cause, class I
  • K08.402 Partial loss of teeth, unspecified cause, class II
  • K08.403 Partial loss of teeth, unspecified cause, class III
  • K08.404 Partial loss of teeth, unspecified cause, class IV
  • K08.409 Partial loss of teeth, unspecified cause, unspecified class
  • K08.411 Partial loss of teeth due to trauma, class I
  • K08.412 Partial loss of teeth due to trauma, class II
  • K08.413 Partial loss of teeth due to trauma, class III
  • K08.414 Partial loss of teeth due to trauma, class IV
  • K08.419 Partial loss of teeth due to trauma, unspecified class
  • K08.421 Partial loss of teeth due to periodontal diseases, class I
  • K08.422 Partial loss of teeth due to periodontal diseases, class II
  • K08.423 Partial loss of teeth due to periodontal diseases, class III
  • K08.424 Partial loss of teeth due to periodontal diseases, class IV
  • K08.429 Partial loss of teeth due to periodontal diseases, unspecified class
  • K08.431 Partial loss of teeth due to caries, class I
  • K08.432 Partial loss of teeth due to caries, class II
  • K08.433 Partial loss of teeth due to caries, class III
  • K08.434 Partial loss of teeth due to caries, class IV
  • K08.439 Partial loss of teeth due to caries, unspecified class
  • K08.491 Partial loss of teeth due to other specified cause, class I
  • K08.492 Partial loss of teeth due to other specified cause, class II
  • K08.493 Partial loss of teeth due to other specified cause, class III
  • K08.494 Partial loss of teeth due to other specified cause, class IV
  • K08.499 Partial loss of teeth due to other specified cause, unspecified class
  • K08.50 Unsatisfactory restoration of tooth, unspecified
  • K08.51 Open restoration margins of tooth
  • K08.52 Unrepairable overhanging of dental restorative materials
  • K08.530 Fractured dental restorative material without loss of material
  • K08.531 Fractured dental restorative material with loss of material
  • K08.539 Fractured dental restorative material, unspecified
  • K08.54 Contour of existing restoration of tooth biologically incompatible with oral health
  • K08.55 Allergy to existing dental restorative material
  • K08.56 Poor aesthetic of existing restoration of tooth
  • K08.59 Other unsatisfactory restoration of tooth
  • K08.81 Primary occlusal trauma
  • K08.82 Secondary occlusal trauma
  • K08.89 Other specified disorders of teeth and supporting structures
  • K08.9 Disorder of teeth and supporting structures, unspecified
K09 Cysts of oral region, not elsewhere classified4 codes
  • K09.0 Developmental odontogenic cysts
  • K09.1 Developmental (nonodontogenic) cysts of oral region
  • K09.8 Other cysts of oral region, not elsewhere classified
  • K09.9 Cyst of oral region, unspecified
K12 Stomatitis and related lesions8 codes
  • K12.0 Recurrent oral aphthae
  • K12.1 Other forms of stomatitis
  • K12.2 Cellulitis and abscess of mouth
  • K12.30 Oral mucositis (ulcerative), unspecified
  • K12.31 Oral mucositis (ulcerative) due to antineoplastic therapy
  • K12.32 Oral mucositis (ulcerative) due to other drugs
  • K12.33 Oral mucositis (ulcerative) due to radiation
  • K12.39 Other oral mucositis (ulcerative)
K13 Other diseases of lip and oral mucosa13 codes
  • K13.0 Diseases of lips
  • K13.1 Cheek and lip biting
  • K13.21 Leukoplakia of oral mucosa, including tongue
  • K13.22 Minimal keratinized residual ridge mucosa
  • K13.23 Excessive keratinized residual ridge mucosa
  • K13.24 Leukokeratosis nicotina palati
  • K13.29 Other disturbances of oral epithelium, including tongue
  • K13.3 Hairy leukoplakia
  • K13.4 Granuloma and granuloma-like lesions of oral mucosa
  • K13.5 Oral submucous fibrosis
  • K13.6 Irritative hyperplasia of oral mucosa
  • K13.70 Unspecified lesions of oral mucosa
  • K13.79 Other lesions of oral mucosa
K14 Diseases of tongue9 codes
  • K14.0 Glossitis
  • K14.1 Geographic tongue
  • K14.2 Median rhomboid glossitis
  • K14.3 Hypertrophy of tongue papillae
  • K14.4 Atrophy of tongue papillae
  • K14.5 Plicated tongue
  • K14.6 Glossodynia
  • K14.8 Other diseases of tongue
  • K14.9 Disease of tongue, unspecified
M26 Dentofacial anomalies [including malocclusion]78 codes
  • M26.00 Unspecified anomaly of jaw size
  • M26.01 Maxillary hyperplasia
  • M26.02 Maxillary hypoplasia
  • M26.03 Mandibular hyperplasia
  • M26.04 Mandibular hypoplasia
  • M26.05 Macrogenia
  • M26.06 Microgenia
  • M26.07 Excessive tuberosity of jaw
  • M26.09 Other specified anomalies of jaw size
  • M26.10 Unspecified anomaly of jaw-cranial base relationship
  • M26.11 Maxillary asymmetry
  • M26.12 Other jaw asymmetry
  • M26.19 Other specified anomalies of jaw-cranial base relationship
  • M26.20 Unspecified anomaly of dental arch relationship
  • M26.211 Malocclusion, Angle's class I
  • M26.212 Malocclusion, Angle's class II
  • M26.213 Malocclusion, Angle's class III
  • M26.219 Malocclusion, Angle's class, unspecified
  • M26.220 Open anterior occlusal relationship
  • M26.221 Open posterior occlusal relationship
  • M26.23 Excessive horizontal overlap
  • M26.24 Reverse articulation
  • M26.25 Anomalies of interarch distance
  • M26.29 Other anomalies of dental arch relationship
  • M26.30 Unspecified anomaly of tooth position of fully erupted tooth or teeth
  • M26.31 Crowding of fully erupted teeth
  • M26.32 Excessive spacing of fully erupted teeth
  • M26.33 Horizontal displacement of fully erupted tooth or teeth
  • M26.34 Vertical displacement of fully erupted tooth or teeth
  • M26.35 Rotation of fully erupted tooth or teeth
  • M26.36 Insufficient interocclusal distance of fully erupted teeth (ridge)
  • M26.37 Excessive interocclusal distance of fully erupted teeth
  • M26.39 Other anomalies of tooth position of fully erupted tooth or teeth
  • M26.4 Malocclusion, unspecified
  • M26.50 Dentofacial functional abnormalities, unspecified
  • M26.51 Abnormal jaw closure
  • M26.52 Limited mandibular range of motion
  • M26.53 Deviation in opening and closing of the mandible
  • M26.54 Insufficient anterior guidance
  • M26.55 Centric occlusion maximum intercuspation discrepancy
  • M26.56 Non-working side interference
  • M26.57 Lack of posterior occlusal support
  • M26.59 Other dentofacial functional abnormalities
  • M26.601 Right temporomandibular joint disorder, unspecified
  • M26.602 Left temporomandibular joint disorder, unspecified
  • M26.603 Bilateral temporomandibular joint disorder, unspecified
  • M26.609 Unspecified temporomandibular joint disorder, unspecified side
  • M26.611 Adhesions and ankylosis of right temporomandibular joint
  • M26.612 Adhesions and ankylosis of left temporomandibular joint
  • M26.613 Adhesions and ankylosis of bilateral temporomandibular joint
  • M26.619 Adhesions and ankylosis of temporomandibular joint, unspecified side
  • M26.621 Arthralgia of right temporomandibular joint
  • M26.622 Arthralgia of left temporomandibular joint
  • M26.623 Arthralgia of bilateral temporomandibular joint
  • M26.629 Arthralgia of temporomandibular joint, unspecified side
  • M26.631 Articular disc disorder of right temporomandibular joint
  • M26.632 Articular disc disorder of left temporomandibular joint
  • M26.633 Articular disc disorder of bilateral temporomandibular joint
  • M26.639 Articular disc disorder of temporomandibular joint, unspecified side
  • M26.641 Arthritis of right temporomandibular joint
  • M26.642 Arthritis of left temporomandibular joint
  • M26.643 Arthritis of bilateral temporomandibular joint
  • M26.649 Arthritis of unspecified temporomandibular joint
  • M26.651 Arthropathy of right temporomandibular joint
  • M26.652 Arthropathy of left temporomandibular joint
  • M26.653 Arthropathy of bilateral temporomandibular joint
  • M26.659 Arthropathy of unspecified temporomandibular joint
  • M26.69 Other specified disorders of temporomandibular joint
  • M26.70 Unspecified alveolar anomaly
  • M26.71 Alveolar maxillary hyperplasia
  • M26.72 Alveolar mandibular hyperplasia
  • M26.73 Alveolar maxillary hypoplasia
  • M26.74 Alveolar mandibular hypoplasia
  • M26.79 Other specified alveolar anomalies
  • M26.81 Anterior soft tissue impingement
  • M26.82 Posterior soft tissue impingement
  • M26.89 Other dentofacial anomalies
  • M26.9 Dentofacial anomaly, unspecified
M27 Other diseases of jaws16 codes
  • M27.0 Developmental disorders of jaws
  • M27.1 Giant cell granuloma, central
  • M27.2 Inflammatory conditions of jaws
  • M27.3 Alveolitis of jaws
  • M27.40 Unspecified cyst of jaw
  • M27.49 Other cysts of jaw
  • M27.51 Perforation of root canal space due to endodontic treatment
  • M27.52 Endodontic overfill
  • M27.53 Endodontic underfill
  • M27.59 Other periradicular pathology associated with previous endodontic treatment
  • M27.61 Osseointegration failure of dental implant
  • M27.62 Post-osseointegration biological failure of dental implant
  • M27.63 Post-osseointegration mechanical failure of dental implant
  • M27.69 Other endosseous dental implant failure
  • M27.8 Other specified diseases of jaws
  • M27.9 Disease of jaws, unspecified
Q18 Other congenital malformations of face and neck4 codes
Q35 Cleft palate5 codes
  • Q35.1 Cleft hard palate
  • Q35.3 Cleft soft palate
  • Q35.5 Cleft hard palate with cleft soft palate
  • Q35.7 Cleft uvula
  • Q35.9 Cleft palate, unspecified
Q36 Cleft lip3 codes
  • Q36.0 Cleft lip, bilateral
  • Q36.1 Cleft lip, median
  • Q36.9 Cleft lip, unilateral
Q37 Cleft palate with cleft lip8 codes
  • Q37.0 Cleft hard palate with bilateral cleft lip
  • Q37.1 Cleft hard palate with unilateral cleft lip
  • Q37.2 Cleft soft palate with bilateral cleft lip
  • Q37.3 Cleft soft palate with unilateral cleft lip
  • Q37.4 Cleft hard and soft palate with bilateral cleft lip
  • Q37.5 Cleft hard and soft palate with unilateral cleft lip
  • Q37.8 Unspecified cleft palate with bilateral cleft lip
  • Q37.9 Unspecified cleft palate with unilateral cleft lip
Q38 Other congenital malformations of tongue, mouth and pharynx5 codes
  • Q38.0 Congenital malformations of lips, not elsewhere classified
  • Q38.1 Ankyloglossia
  • Q38.2 Macroglossia
  • Q38.3 Other congenital malformations of tongue
  • Q38.6 Other congenital malformations of mouth
R68 Other general symptoms and signs1 code
S01 Open wound of head12 codes
  • S01.501A Unspecified open wound of lip, initial encounter
  • S01.502A Unspecified open wound of oral cavity, initial encounter
  • S01.511A Laceration without foreign body of lip, initial encounter
  • S01.512A Laceration without foreign body of oral cavity, initial encounter
  • S01.521A Laceration with foreign body of lip, initial encounter
  • S01.522A Laceration with foreign body of oral cavity, initial encounter
  • S01.531A Puncture wound without foreign body of lip, initial encounter
  • S01.532A Puncture wound without foreign body of oral cavity, initial encounter
  • S01.541A Puncture wound with foreign body of lip, initial encounter
  • S01.542A Puncture wound with foreign body of oral cavity, initial encounter
  • S01.551A Open bite of lip, initial encounter
  • S01.552A Open bite of oral cavity, initial encounter
S02 Fracture of skull and facial bones74 codes
  • S02.400A Malar fracture, unspecified side, initial encounter for closed fracture
  • S02.400B Malar fracture, unspecified side, initial encounter for open fracture
  • S02.401A Maxillary fracture, unspecified side, initial encounter for closed fracture
  • S02.401B Maxillary fracture, unspecified side, initial encounter for open fracture
  • S02.402A Zygomatic fracture, unspecified side, initial encounter for closed fracture
  • S02.402B Zygomatic fracture, unspecified side, initial encounter for open fracture
  • S02.40AA Malar fracture, right side, initial encounter for closed fracture
  • S02.40AB Malar fracture, right side, initial encounter for open fracture
  • S02.40BA Malar fracture, left side, initial encounter for closed fracture
  • S02.40BB Malar fracture, left side, initial encounter for open fracture
  • S02.40CA Maxillary fracture, right side, initial encounter for closed fracture
  • S02.40CB Maxillary fracture, right side, initial encounter for open fracture
  • S02.40DA Maxillary fracture, left side, initial encounter for closed fracture
  • S02.40DB Maxillary fracture, left side, initial encounter for open fracture
  • S02.40EA Zygomatic fracture, right side, initial encounter for closed fracture
  • S02.40EB Zygomatic fracture, right side, initial encounter for open fracture
  • S02.40FA Zygomatic fracture, left side, initial encounter for closed fracture
  • S02.40FB Zygomatic fracture, left side, initial encounter for open fracture
  • S02.411A LeFort I fracture, initial encounter for closed fracture
  • S02.411B LeFort I fracture, initial encounter for open fracture
  • S02.412A LeFort II fracture, initial encounter for closed fracture
  • S02.412B LeFort II fracture, initial encounter for open fracture
  • S02.413A LeFort III fracture, initial encounter for closed fracture
  • S02.413B LeFort III fracture, initial encounter for open fracture
  • S02.5XXA Fracture of tooth (traumatic), initial encounter for closed fracture
  • S02.5XXB Fracture of tooth (traumatic), initial encounter for open fracture
  • S02.600A Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture
  • S02.600B Fracture of unspecified part of body of mandible, unspecified side, initial encounter for open fracture
  • S02.601A Fracture of unspecified part of body of right mandible, initial encounter for closed fracture
  • S02.601B Fracture of unspecified part of body of right mandible, initial encounter for open fracture
  • S02.602A Fracture of unspecified part of body of left mandible, initial encounter for closed fracture
  • S02.602B Fracture of unspecified part of body of left mandible, initial encounter for open fracture
  • S02.609A Fracture of mandible, unspecified, initial encounter for closed fracture
  • S02.609B Fracture of mandible, unspecified, initial encounter for open fracture
  • S02.610A Fracture of condylar process of mandible, unspecified side, initial encounter for closed fracture
  • S02.610B Fracture of condylar process of mandible, unspecified side, initial encounter for open fracture
  • S02.611A Fracture of condylar process of right mandible, initial encounter for closed fracture
  • S02.611B Fracture of condylar process of right mandible, initial encounter for open fracture
  • S02.612A Fracture of condylar process of left mandible, initial encounter for closed fracture
  • S02.612B Fracture of condylar process of left mandible, initial encounter for open fracture
  • S02.620A Fracture of subcondylar process of mandible, unspecified side, initial encounter for closed fracture
  • S02.620B Fracture of subcondylar process of mandible, unspecified side, initial encounter for open fracture
  • S02.621A Fracture of subcondylar process of right mandible, initial encounter for closed fracture
  • S02.621B Fracture of subcondylar process of right mandible, initial encounter for open fracture
  • S02.622A Fracture of subcondylar process of left mandible, initial encounter for closed fracture
  • S02.622B Fracture of subcondylar process of left mandible, initial encounter for open fracture
  • S02.630A Fracture of coronoid process of mandible, unspecified side, initial encounter for closed fracture
  • S02.630B Fracture of coronoid process of mandible, unspecified side, initial encounter for open fracture
  • S02.631A Fracture of coronoid process of right mandible, initial encounter for closed fracture
  • S02.631B Fracture of coronoid process of right mandible, initial encounter for open fracture
  • S02.632A Fracture of coronoid process of left mandible, initial encounter for closed fracture
  • S02.632B Fracture of coronoid process of left mandible, initial encounter for open fracture
  • S02.640A Fracture of ramus of mandible, unspecified side, initial encounter for closed fracture
  • S02.640B Fracture of ramus of mandible, unspecified side, initial encounter for open fracture
  • S02.641A Fracture of ramus of right mandible, initial encounter for closed fracture
  • S02.641B Fracture of ramus of right mandible, initial encounter for open fracture
  • S02.642A Fracture of ramus of left mandible, initial encounter for closed fracture
  • S02.642B Fracture of ramus of left mandible, initial encounter for open fracture
  • S02.650A Fracture of angle of mandible, unspecified side, initial encounter for closed fracture
  • S02.650B Fracture of angle of mandible, unspecified side, initial encounter for open fracture
  • S02.651A Fracture of angle of right mandible, initial encounter for closed fracture
  • S02.651B Fracture of angle of right mandible, initial encounter for open fracture
  • S02.652A Fracture of angle of left mandible, initial encounter for closed fracture
  • S02.652B Fracture of angle of left mandible, initial encounter for open fracture
  • S02.66XA Fracture of symphysis of mandible, initial encounter for closed fracture
  • S02.66XB Fracture of symphysis of mandible, initial encounter for open fracture
  • S02.670A Fracture of alveolus of mandible, unspecified side, initial encounter for closed fracture
  • S02.670B Fracture of alveolus of mandible, unspecified side, initial encounter for open fracture
  • S02.671A Fracture of alveolus of right mandible, initial encounter for closed fracture
  • S02.671B Fracture of alveolus of right mandible, initial encounter for open fracture
  • S02.672A Fracture of alveolus of left mandible, initial encounter for closed fracture
  • S02.672B Fracture of alveolus of left mandible, initial encounter for open fracture
  • S02.69XA Fracture of mandible of other specified site, initial encounter for closed fracture
  • S02.69XB Fracture of mandible of other specified site, initial encounter for open fracture
S03 Dislocation and sprain of joints and ligaments of head9 codes
  • S03.00XA Dislocation of jaw, unspecified side, initial encounter
  • S03.01XA Dislocation of jaw, right side, initial encounter
  • S03.02XA Dislocation of jaw, left side, initial encounter
  • S03.03XA Dislocation of jaw, bilateral, initial encounter
  • S03.2XXA Dislocation of tooth, initial encounter
  • S03.40XA Sprain of jaw, unspecified side, initial encounter
  • S03.41XA Sprain of jaw, right side, initial encounter
  • S03.42XA Sprain of jaw, left side, initial encounter
  • S03.43XA Sprain of jaw, bilateral, initial encounter
T18 Foreign body in alimentary tract1 code
  • T18.0XXA Foreign body in mouth, initial encounter
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 159 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 159?

MS-DRG 159 (Dental and Oral Diseases without CC/MCC) is a medical DRG in MDC 03 (Diseases & Disorders of the Ear, Nose, Mouth & Throat). Its FY 2026 relative weight is 0.7085 with a geometric mean length of stay of 2.1 days.

What is the difference between DRG 157, 158, 159?

All 3 share the same base category; the severity of secondary diagnoses separates them: 157 (with MCC), 158 (with CC), 159 (without CC/MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.

How many diagnosis codes group to DRG 159?

415 ICD-10-CM principal diagnosis codes group to this DRG, spanning 29 three-character categories.

What is the relative weight of DRG 159?

The FY 2026 relative weight of this DRG is 0.7085, meaning reimbursement of roughly 0.71 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

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Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.