J99 — Respiratory disorders in diseases classified elsewhere
Is J99 billable?
Yes — J99 is billable for FY2027. J99 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. J99 may be submitted for encounters from October 1, 2026 through September 30, 2027.
J99 at a glance
| Code | J99 |
|---|---|
| Description | Respiratory disorders in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to J99?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name J99 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does J99 group to?
J99 sits in MDC 04 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 196Interstitial Lung Disease with MCCmedical
- 197Interstitial Lung Disease with CCmedical
- 198Interstitial Lung Disease without CC/MCCmedical
How is J99 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to J99. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Bronchomycosis NOS
- Pneumomycosis
- Amyloidosis › with lung involvement (generalized) (primary)
- Amyloidosis › pulmonary (generalized) (primary)
- Amyloidosis › subglottic (generalized) (primary)
- Bilharziasis › pulmonary NOS
- Cryoglobulinemia › with lung involvement (essential) (idiopathic) (mixed) (primary) (purpura) (secondary) (vasculitis)
- Schistosomiasis › lung NEC
- Schistosomiasis › pulmonary NEC
- Snuffles › syphilitic (non-syphilitic)
- Cyst › hydatid › lung NEC (colloid) (mucous) (simple) (retention)
- Laryngitis › syphilitic › congenital (acute) (edematous) (fibrinous) (infective) (infiltrative) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (septic) (subglottic) (suppurative) (ulcerative)
Excludes1 — never code together
The conditions below can never be reported together with J99 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- respiratory disorders in:
- amebiasis (A06.5)
- blastomycosis (B40.0-B40.2)
- candidiasis (B37.1)
- coccidioidomycosis (B38.0-B38.2)
- cystic fibrosis with pulmonary manifestations (E84.0)
- dermatomyositis (M33.01, M33.11)
- histoplasmosis (B39.0-B39.2)
- late syphilis (A52.72, A52.73)
- polymyositis (M33.21)
- Sjögren syndrome (M35.02)
- systemic lupus erythematosus (M32.13)
- systemic sclerosis (M34.81)
- Wegener's granulomatosis (M31.30-M31.31)
Code first
The underlying condition below must be sequenced before J99. J99 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 10
Report an additional code alongside J99 to fully describe the condition. J99 is sequenced first.
Excludes2 — not included here — inherited from Chapter 10
The conditions below are not part of J99, but a patient may have both at the same time. When documentation supports it, J99 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)
How long has J99 existed?
J99 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.
Which codes are confused with J99?
ICD-10-CM declares these codes mutually exclusive with J99 — exactly one of each pair can be correct for a given encounter.