New for FY2027 ICD-10-CM · October 1, 2026
J34.830: Odontogenic sinusitis, maxillary sinus
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Odontogenic sinusitis, maxillary sinus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).
Source: J00-J99 (chapter, inherited).
Instructional note
code, where applicable, to identify:
Source: J00-J99 (chapter, inherited).
Instructional note
exposure to environmental tobacco smoke (Z77.22)
Source: J00-J99 (chapter, inherited).
Instructional note
exposure to tobacco smoke in the perinatal period (P96.81)
Source: J00-J99 (chapter, inherited).
Instructional note
history of tobacco dependence (Z87.891)
Source: J00-J99 (chapter, inherited).
Instructional note
occupational exposure to environmental tobacco smoke (Z57.31)
Source: J00-J99 (chapter, inherited).
Instructional note
tobacco dependence (F17.-)
Source: J00-J99 (chapter, inherited).
Instructional note
tobacco use (Z72.0)
Source: J00-J99 (chapter, inherited).
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: J00-J99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: J00-J99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: J00-J99 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: J00-J99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: J00-J99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: J00-J99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: J00-J99 (chapter, inherited).
Excludes2
smoke inhalation (T59.81-)
Source: J00-J99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: J00-J99 (chapter, inherited).
Excludes2
varicose ulcer of nasal septum (I86.8)
Source: J34 (category, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does J34.830 mean in FY2027?
The official ICD-10-CM descriptor is Odontogenic sinusitis, maxillary sinus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
When did J34.830 become an ICD-10-CM code?
J34.830 is new for FY2027 ICD-10-CM, effective October 1, 2026. It is absent from the FY2026 April order file. Use the code set that applies to the encounter or inpatient discharge date, and check the official Tabular instructions.
Is J34.830 billable in FY2027?
The FY2027 order file marks J34.830 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does J34.830 map to an HCC?
J34.830 is not in the current CMS mapping file (it is new for FY2027), and CMS has not yet published payment year 2028 mappings. No HCC category or RAF coefficient is shown.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.