J01.00 — Acute maxillary sinusitis, unspecified
Is J01.00 billable?
Yes, but J01.00 is an unspecified code. J01.00 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, J01.00 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting J01.00 — the more specific alternatives are listed below.
More specific alternatives
J01.00 at a glance
| Code | J01.00 |
|---|---|
| Description | Acute maxillary sinusitis, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does J01.00 group to?
J01.00 sits in MDC 03 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 152Otitis Media and URI with MCCmedical
- 153Otitis Media and URI without MCCmedical
How is J01.00 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to J01.00. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Antritis › maxilla › acute
- Sinusitis › acute › maxillary (accessory) (chronic) (hyperplastic) (nasal) (nonpurulent) (purulent)
- Sinusitis › maxillary › acute (accessory) (chronic) (hyperplastic) (nasal) (nonpurulent) (purulent)
Excludes1 — never code together — inherited from J00-J06
The conditions below can never be reported together with J01.00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)
Excludes1 — never code together — inherited from J01
The conditions below can never be reported together with J01.00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- sinusitis NOS (J32.9)
Use additional code — inherited from Chapter 10
Report an additional code alongside J01.00 to fully describe the condition. J01.00 is sequenced first.
Use additional code — inherited from J01
Report an additional code alongside J01.00 to fully describe the condition. J01.00 is sequenced first.
- code (B95-B97) to identify infectious agent.
Excludes2 — not included here — inherited from Chapter 10
The conditions below are not part of J01.00, but a patient may have both at the same time. When documentation supports it, J01.00 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- smoke inhalation (T59.81-)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from J01
The conditions below are not part of J01.00, but a patient may have both at the same time. When documentation supports it, J01.00 and the excluded code may both be reported.
- chronic sinusitis (J32.0-J32.8)
How long has J01.00 existed?
J01.00 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.