I27.29 is the authoritative medical code for Other secondary pulmonary hypertension. This classification is used in medical billing and clinical recording to specify the clinical criteria for other secondary pulmonary hypertension (ICD-10-CM I27.29), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Other secondary pulmonary hypertension is a billable ICD-10-CM diagnosis code I27.29. Inclusion terms: Group 5 pulmonary hypertension; Pulmonary hypertension with unclear multifactorial mechanisms; Pulmonary hypertension due to hematologic disorders; Pulmonary hypertension due to metabolic disorders; Pulmonary hypertension due to other systemic disorders. Excludes1 (not coded here): Eisenmenger's syndrome I27.83. Code also: other associated disorders, if known, such as:; chronic myeloid leukemia (C92.10-C92.22); essential thrombocythemia D47.3; Gaucher disease E75.22; hypertensive chronic kidney disease with end stage renal disease (I12.0, I13.11, I13.2); hyperthyroidism E05.-; hypothyroidism E00-E03; polycythemia vera D45; sarcoidosis D86.-; associated underlying condition.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I27.29 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Group 5 pulmonary hypertension
- Pulmonary hypertension with unclear multifactorial mechanisms
- Pulmonary hypertension due to hematologic disorders
- Pulmonary hypertension due to metabolic disorders
- Pulmonary hypertension due to other systemic disorders
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- Eisenmenger's syndrome I27.83
Code Also
Additional codes that may be required to fully describe the encounter.
- other associated disorders, if known, such as:
- chronic myeloid leukemia (C92.10-C92.22)
- essential thrombocythemia D47.3
- Gaucher disease E75.22
- hypertensive chronic kidney disease with end stage renal disease (I12.0, I13.11, I13.2)
- hyperthyroidism E05.-
- hypothyroidism E00-E03
- polycythemia vera D45
- sarcoidosis D86.-
- associated underlying condition
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with I27.29?
Per Excludes1 instructions, I27.29 must not be reported with: Eisenmenger's syndrome (I27.83).
What conditions are included under I27.29?
Other secondary pulmonary hypertension includes: Group 5 pulmonary hypertension; Pulmonary hypertension with unclear multifactorial mechanisms; Pulmonary hypertension due to hematologic disorders; Pulmonary hypertension due to metabolic disorders; Pulmonary hypertension due to other systemic disorders.
Codes in This Family (20)
Official ICD-10-CM classifications in the same code family as I27.29, with their registry titles.
- I27 — Other pulmonary heart diseases
- I27.0 — Primary pulmonary hypertension
- I27.1 — Kyphoscoliotic heart disease
- I27.2 — Other secondary pulmonary hypertension
- I27.20 — Pulmonary hypertension, unspecified
- I27.21 — Secondary pulmonary arterial hypertension
- I27.22 — Pulmonary hypertension due to left heart disease
- I27.23 — Pulmonary hypertension due to lung diseases and hypoxia
- I27.24 — Chronic thromboembolic pulmonary hypertension
- I27.8 — Other specified pulmonary heart diseases
- I27.81 — Cor pulmonale (chronic)
- I27.82 — Chronic pulmonary embolism
- I27.83 — Eisenmenger's syndrome
- I27.84 — Fontan related circulation
- I27.840 — Fontan-associated liver disease [FALD]
- I27.841 — Fontan-associated lymphatic dysfunction
- I27.848 — Other Fontan-associated condition
- I27.849 — Fontan related circulation, unspecified
- I27.89 — Other specified pulmonary heart diseases
- I27.9 — Pulmonary heart disease, unspecified
Indexed Clinical Terms (8)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, due to, hematologic disorders
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, due to, metabolic disorders
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, due to, specified systemic disorders NEC
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, group 5
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, secondary, specified NEC
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, with, cor pulmonale (chronic)
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, with, right heart ventricular strain/failure
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), pulmonary, with, unclear multifactorial mechanisms
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: