2027 ICD-10-CM Diagnosis Code J70.9Respiratory conditions due to unspecified external agent
ICD-10-CM Codes›J00–J99›J60-J70›J70
- Billable — Valid for Submission
- Not Chronic
J70.9 is a billable ICD-10-CM diagnosis code for respiratory conditions due to unspecified external agent. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 205 through 206. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Lung disease due to external agents.
J70.9 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 112 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 112, ESRD (V21) category 112, and ESRD (V24) category 112 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
J70.9 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute toxic tracheobronchitis
- Acute tracheitis
- Acute tracheobronchitis
- Environmental lung disease
- Interruption of respiration caused by foreign body in esophagus
- Lung disease due to external agents
- Millers' asthma
- Pulmonary aspiration
- Respiratory compression due to foreign body in esophagus
- Respiratory disorder caused by drug
- Respiratory obstruction due to foreign body in esophagus
- Silo-fillers' disease
- Toxic pulmonary edema
- Weavers' cough
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J70.9: its own notes plus those printed at block J60-J70 and Chapter 10. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may 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)
Code First
The underlying condition named in the note is sequenced before this code.
Notes
General instructions on how these codes are used.
- 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: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name J70.9, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming J70.9: they are not reported together with it, unless the two conditions are unrelated.
- J81 Pulmonary edema
Excludes2 5
These codes carry an Excludes2 note naming J70.9: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 1
These codes say to code first a condition named in the note, and J70.9 is one of the conditions named.
- J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
Use Additional Code 1
These codes say to use an additional code from the note, and J70.9 is one of the codes named.
- Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Lung Diseases
When you breathe, your lungs take in oxygen from the air and deliver it to the bloodstream. The cells in your body need oxygen to work and grow. During a normal day, you breathe nearly 25,000 times. People with lung disease have difficulty breathing. Millions of people in the U.S. have lung disease.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J70.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J70.9Overview
What is the ICD-10 code for respiratory conditions due to unspecified external agent?
The ICD-10-CM code for respiratory conditions due to unspecified external agent is J70.9 (sometimes written as J709). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J70.9 (Respiratory conditions due to other external agents) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report respiratory conditions due to unspecified external agent on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J70.9 group to?
When respiratory conditions due to unspecified external agent is the principal diagnosis on an inpatient stay, it groups to MS-DRG 206, 205, with relative weights from 0.9255 to 1.8244 depending on complications. Higher weights mean higher Medicare reimbursement.
What is coded first with J70.9?
The Code First note reads: (T51-T65) to identify the external agent. When one of these applies, it is sequenced before J70.9.
What is the ICD-9 equivalent of J70.9?
Under the General Equivalence Mappings, respiratory conditions due to unspecified external agent converts to ICD-9-CM 508.9 (resp cond: ext agent NOS). The mapping is a direct match.
Does J70.9 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. J70.9 mapped to HCC 112 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders), ESRD (V21) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders), and ESRD (V24) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders).
