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FY2027 ICD-10-CM reference

J99: Respiratory disorders in diseases classified elsewhere

By the HCC Buddy Coding Team

The official ICD-10-CM descriptor is Respiratory disorders in diseases classified elsewhere. 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.

Oct to Dec 2026, PY2027

CMS-HCC V28

Mapped
  • HCC 280Chronic Obstructive Pulmonary Disease, Inters...Coefficient 0.319 (CNA, PY2027)

CMS-HCC V24

Not used by CMS

ESRD

Mapped
  • HCC 112Fibrosis of Lung and Other Chronic Lung Disor...Coefficient 0.058 (Dialysis CE, PY2027)

RxHCC

Mapped
  • HCC 227Pulmonary Fibrosis, Except IdiopathicCoefficient 0.273 (MA-PD CE non-low aged, PY2027)

PACE (CMS-HCC V22 component)

Mapped
  • HCC 112Fibrosis of Lung and Other Chronic Lung Disor...

PACE ESRD (ESRD V21 component)

Mapped
  • HCC 112Fibrosis of Lung and Other Chronic Lung Disor...

PACE RxHCC (2018/2019 component)

Mapped
  • HCC 227Pulmonary Fibrosis, Except Idiopathic

Jan to Sep 2027, PY2028

CMS-HCC V28

Not published by CMS

CMS-HCC V24

Not published by CMS

ESRD

Not published by CMS

RxHCC

Not published by CMS

PACE (CMS-HCC V22 component)

Not published by CMS

PACE ESRD (ESRD V21 component)

Not published by CMS

PACE RxHCC component

Not published by CMS

Oct to Dec 2026, BY2026

HHS-HCC

Pending

Jan to Sep 2027, BY2027

HHS-HCC

Not published by CMS

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).

Code first

underlying disease, such as:

Source: J99 (category, direct).

Code first

amyloidosis (E85.-)

Source: J99 (category, direct).

Code first

ankylosing spondylitis (M45.-)

Source: J99 (category, direct).

Code first

bronchomycosis (B49)

Source: J99 (category, direct).

Code first

congenital syphilis (A50.-)

Source: J99 (category, direct).

Code first

cryoglobulinemia (D89.1)

Source: J99 (category, direct).

Code first

early congenital syphilis (A50.0-)

Source: J99 (category, direct).

Code first

plasminogen deficiency (E88.02)

Source: J99 (category, direct).

Code first

schistosomiasis (B65.0-B65.9)

Source: J99 (category, direct).

Excludes1

respiratory disorders in:

Source: J99 (category, direct).

Excludes1

amebiasis (A06.5)

Source: J99 (category, direct).

Excludes1

blastomycosis (B40.0-B40.2)

Source: J99 (category, direct).

Excludes1

candidiasis (B37.1)

Source: J99 (category, direct).

Excludes1

coccidioidomycosis (B38.0-B38.2)

Source: J99 (category, direct).

Excludes1

cystic fibrosis with pulmonary manifestations (E84.0)

Source: J99 (category, direct).

Excludes1

dermatomyositis (M33.01, M33.11)

Source: J99 (category, direct).

Excludes1

histoplasmosis (B39.0-B39.2)

Source: J99 (category, direct).

Excludes1

late syphilis (A52.72, A52.73)

Source: J99 (category, direct).

Excludes1

polymyositis (M33.21)

Source: J99 (category, direct).

Excludes1

Sjögren syndrome (M35.02)

Source: J99 (category, direct).

Excludes1

systemic lupus erythematosus (M32.13)

Source: J99 (category, direct).

Excludes1

systemic sclerosis (M34.81)

Source: J99 (category, direct).

Excludes1

Wegener's granulomatosis (M31.30-M31.31)

Source: J99 (category, direct).

Source: CMS FY2027 Tabular List and Alphabetic Index.

Open Tabular instructions and code details

Compare the FY2027 additions, removals and billable-status changes

What does J99 mean in FY2027?

The official ICD-10-CM descriptor is Respiratory disorders in diseases classified elsewhere. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.

Is J99 billable in FY2027?

The FY2027 order file marks J99 as billable. Check the complete Tabular instructions and documentation before assigning it.

Does J99 map to an HCC?

Oct to Dec 2026, PY2027: CMS-HCC V28 HCC 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders); CMS-HCC V24: Not used by CMS; ESRD HCC 112 (Fibrosis of Lung and Other Chronic Lung Disorders); RxHCC HCC 227 (Pulmonary Fibrosis, Except Idiopathic). Jan to Sep 2027, PY2028: CMS-HCC V28: Not published by CMS; CMS-HCC V24: Not published by CMS; ESRD: Not published by CMS; RxHCC: Not published by CMS. Oct to Dec 2026, BY2026: HHS-HCC: Pending. Jan to Sep 2027, BY2027: HHS-HCC: Not published by CMS. Base coefficients are reference values, not a member total.

Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.

Review the FY2026 April edition