If you bill or code for hospice services, one wrong diagnosis code can trigger a claim denial, a Medicare audit, or worse, a payback demand. This guide covers every ICD-10 hospice code you need in 2026, including what’s changed, what’s no longer acceptable as a primary diagnosis, and how to sequence codes correctly under current CMS rules.

The most common ICD-10 hospice codes for 2026:

The most commonly used ICD-10 hospice codes include

• G30.9 (Alzheimer’s disease), 
• I50.9 (heart failure, unspecified), 
• J44.9 (COPD), 
• N18.6 (end-stage renal disease), 
• C79.9 (metastatic cancer), 
• I63.9 (stroke). 
• Z51.5 (an encounter for palliative care, is POA-exempt. 

As of 2025, codes R53.81 (debility) and R62.7 (adult failure to thrive) are no longer accepted as primary diagnoses on hospice claims.

What Are ICD-10 Hospice Codes?

ICD-10 hospice codes are diagnosis codes from the International Classification of Diseases, 10th Revision (ICD-10-CM), used to document a patient’s terminal condition and related health issues on hospice claims. They serve three functions: 

1. Billing accuracy, 
2. CMS compliance, 
3. And care planning.

Hospice coding differs from hospital or outpatient coding in one critical way. The primary diagnosis must reflect the terminal illness expected to cause death within six months or less, assuming the disease follows its normal course. 

You cannot use symptom codes, injury codes, or vague unspecified conditions as the principal diagnosis on hospice claims.

CMS updates ICD-10-CM codes annually on October 1. The 2026 edition became effective October 1, 2025.

2026 Primary vs. Secondary Hospice ICD-10 Codes

Every hospice claim has a principal diagnosis and may have multiple secondary diagnoses. These are not interchangeable.

The primary code reflects the terminal condition driving hospice admission. It must be specific enough to support a six-month prognosis and must appear on CMS’s approved list of acceptable principal diagnoses.

Secondary codes document comorbidities that affect care but are not themselves the reason for hospice admission. Examples include diabetes (E11.9), pressure ulcers (L89.90), and anemia (D64.9).

CMS requires correct sequencing. The terminal diagnosis goes first. Supporting conditions follow. Incorrect sequencing is one of the most common reasons hospice claims are flagged during audits.

Commonly Used ICD-10 Hospice Codes (2026)

Z51.5 is billable, POA-exempt, and has remained unchanged since its introduction in the 2016 ICD-10-CM edition. It is used to indicate that a patient encounter involves palliative or hospice services. 

In inpatient settings, there is ongoing guidance from AAPC and ACDIS on whether Z51.5 should be sequenced as primary or secondary; always defer to your facility’s coding policy and the current Official Coding Guidelines.

Dementia and Alzheimer’s ICD-10 Codes for Hospice

Dementia is one of the most common primary hospice diagnoses. To qualify, the patient’s cognitive decline must be severe and terminal, with functional impairment supporting a six-month or less prognosis.

G30.9 – Alzheimer’s disease, unspecified. 

Use this when the diagnosis is confirmed but the specific type or stage is not documented in the chart. This is the most frequently used dementia code in hospice billing.

G31.83 – Dementia with Lewy bodies. 

This applies when the patient has cognitive decline with the hallmark features of Lewy body disease, including fluctuating cognition, visual hallucinations, and parkinsonism. It requires physician documentation of the specific diagnosis.

F01.51 – Vascular dementia with behavioral disturbance. 

Use this when the patient has vascular dementia accompanied by behavioral symptoms such as agitation, aggression, or psychosis.

F01.50 – Vascular dementia, unspecified. 

Use this when vascular dementia is documented but behavioral disturbance is not specifically noted.

One distinction coders often miss: 

G30.9 classifies Alzheimer’s disease as the underlying cause. When Alzheimer’s leads to dementia, you may also need F02.80 or F02.81 (dementia in other diseases classified elsewhere) depending on documentation. 

Note: Review your physician’s notes carefully before selecting a single code.

Heart Failure and Cardiac Hospice ICD-10 Codes

Heart failure is among the top five reasons patients are admitted to hospice. Selecting the correct code matters because payers and auditors look for clinical specificity.

I50.9 – Heart failure, unspecified. 

Acceptable when the chart does not specify systolic, diastolic, or combined failure. Avoid this code if the documentation supports a more specific choice.

I50.22 – Chronic systolic heart failure. 

Use when the ejection fraction is reduced, and the condition is chronic.

I50.42 – Chronic combined systolic and diastolic heart failure.

 This is the most clinically precise code for many end-stage heart failure patients. It reflects both pumping and filling dysfunction.

I25.5 – Ischemic cardiomyopathy. 

Applies when heart muscle weakness results from coronary artery disease and reduced blood supply.

I25.10 – Atherosclerotic heart disease, unspecified. 

Use this for coronary artery disease without documented angina.

For cardiac hospice coding, physician documentation must include the type and stage of heart failure, symptoms such as dyspnea or edema, and clinical evidence that the condition is terminal.

Kidney and Liver Disease Hospice ICD-10 Codes

N18.3 – Chronic kidney disease, stage 3. 

This code reflects moderate kidney damage (GFR 30 to 59). It is rarely appropriate as a primary hospice diagnosis on its own unless combined with other terminal conditions.

N18.4 – Chronic kidney disease, stage 4. 

Use for severe kidney damage (GFR 15 to 29), often a precursor to ESRD.

N18.6 – End-stage renal disease (ESRD). 

This is the appropriate primary hospice diagnosis for patients who have declined or been unable to continue dialysis and whose overall condition is terminal. It requires physician documentation confirming the terminal prognosis.

K74.60 – Unspecified cirrhosis of the liver. 

Use when cirrhosis is confirmed, but the etiology (alcoholic, biliary, etc.) is not documented.

K72.90 – Hepatic failure, unspecified. 

Appropriate for patients with liver failure when the acute or chronic nature is not specified in the chart.

ICD-10 Codes for Neurological and Pulmonary Conditions

G20 – Parkinson’s disease. 

Parkinson’s qualifies as a primary hospice diagnosis when the patient has reached a stage of severe functional decline and the disease course supports a six-month prognosis. Late-stage Parkinson’s commonly involves dysphagia, recurrent aspiration pneumonia, and immobility.

G93.40 – Encephalopathy, unspecified. 

Use when brain dysfunction is documented without a specific cause identified.

I69.359 – Hemiplegia following cerebral infarction. 

Applies to patients with post-stroke one-sided paralysis.

J44.9 – COPD, unspecified. 

A common primary hospice diagnosis for patients with end-stage lung disease. Physician documentation should include FEV1 results, oxygen dependence, and evidence of frequent exacerbations or hospitalizations.

J69.0 – Pneumonitis due to solids and liquids. 

Use when the patient develops aspiration-related lung inflammation, common in late-stage dementia or neurological disease.

Z99.81 – Dependence on supplemental oxygen. 

This is a secondary code used alongside the primary terminal diagnosis. Note: do not confuse this with the retired ICD-9 code 299.81.

What ICD-10 Codes Are NOT Acceptable as Primary Hospice Diagnoses

CMS and Medicare Administrative Contractors (MACs) maintain a list of unacceptable principal diagnosis codes for hospice claims. Using any of these as the primary diagnosis will result in a claim denial.

As of March 2025 (per CMS Change Request 13882 and Palmetto GBA guidance), the following are among the codes no longer accepted as primary hospice diagnoses:

• R53.81 – Other malaise (commonly used for “debility”). This has been rejected as a vague, non-specific code that does not reflect a terminal diagnosis.
• R62.7 – Adult failure to thrive. Similarly rejected by Palmetto GBA and the Alliance for Care at Home as insufficiently specific to document a terminal condition.
• F03.90 – Unspecified dementia without behavioral disturbance. Listed on the National Alliance for Care at Home’s invalid principal diagnosis attachment (CR 8877).
• Symptom codes (R-codes) that describe manifestations of an underlying disease rather than the disease itself.
• Codes for injuries, external causes, or conditions that are not inherently terminal.

The full unacceptable diagnosis list is published in CMS CR 13882 (Attachment A) and updated periodically. Hospice billing teams should review this list at minimum annually.

Coding Guidelines Every Hospice Coder Should Know

Six-month prognosis requirement. 

The primary diagnosis must support a physician-certified prognosis of six months or less if the disease runs its normal course. This is a CMS requirement, not a coding guideline. The physician’s certification must be reflected in the documentation.

Avoid unspecified codes when documentation supports specificity. 

Unspecified codes are not automatically wrong, but auditors treat them as a red flag when more specific codes exist and the chart would support them.

Sequence correctly. 

Terminal diagnosis first. Related comorbidities follow. Non-related comorbidities that affect care may also be reported.

Physician documentation drives coding. 

Coders assign codes based on what is documented, not what is implied. If the chart says “advanced dementia” but doesn’t specify the type, G30.9 or F03.90 may be the only defensible choices even if Lewy body disease is clinically suspected.

Hospice vs. home health coding differences. 

Home health coding targets conditions being actively treated for improvement or stabilization. Hospice coding targets terminal conditions with a declining trajectory. The same patient may carry different primary codes in each setting depending on the purpose of care.

Annual code updates. 

ICD-10-CM codes update every October 1. Using a code that was deleted or revised in the new fiscal year will cause claim rejections starting that date. Review CMS update tables each September.

People Also Ask Questions About ICD-10 Hospice Codes

Let’s answer a few questions about hospice ICD-10 codes now. 

What is the ICD-10 code for hospice patients? 

There is no single ICD-10 code that applies to all hospice patients. Z51.5 (encounter for palliative care) identifies that the encounter involves hospice or palliative services, but every patient also requires a primary terminal diagnosis code, such as G30.9 for Alzheimer’s, I50.9 for heart failure, or N18.6 for end-stage renal disease. The primary code must reflect the condition driving the terminal prognosis.

Can vascular dementia be a primary hospice diagnosis? 

Yes. Vascular dementia (F01.50 or F01.51) is an acceptable primary hospice diagnosis when the patient’s condition meets the six-month prognosis criteria and physician documentation supports the terminal nature of the disease. F01.51 is used when behavioral disturbance is also documented.

Does Parkinson’s disease qualify for hospice? 

Yes. Parkinson’s disease (G20) qualifies as a primary hospice diagnosis when the patient has reached end-stage disease with severe functional decline, dysphagia, recurrent aspiration pneumonia, or other complications that support a prognosis of six months or less. The physician must certify the prognosis in writing.

What diagnosis codes are not allowed for hospice claims? 

CMS prohibits any ICD-10 code on its unacceptable principal diagnosis list from being used as the primary diagnosis on hospice claims. Common examples include R53.81 (debility), R62.7 (adult failure to thrive), and F03.90 (unspecified dementia). The full list is in CMS CR 13882 Attachment A, updated March 2025. Using a prohibited code as the principal diagnosis results in automatic claim denial.

What is Z51.5, and when do you use it? 

Z51.5 is the ICD-10-CM code for “encounter for palliative care.” It is POA-exempt, billable, and used to flag that the encounter involves hospice or comfort-focused services. It should be reported alongside the terminal diagnosis code, not in place of it. Facilities differ on whether Z51.5 is sequenced as primary or secondary; follow your facility policy and the Official Coding Guidelines.

What is the difference between primary and secondary hospice codes? 

The primary code reflects the terminal illness directly responsible for the patient’s hospice admission and expected death. Secondary codes document comorbid conditions that affect care but are not themselves the reason for the prognosis. For example, a patient dying of advanced heart failure (I50.42) may also have diabetes (E11.9) and chronic kidney disease (N18.4) reported as secondary diagnoses.

How often do ICD-10 hospice codes change? 

ICD-10-CM is updated annually on October 1 by the CDC and CMS. Some years bring minor additions or revisions; others include significant changes to acceptable principal diagnosis lists. CMS also periodically issues change requests (CRs) between annual updates to clarify coding policy. Hospice billing teams should review the CMS CR list and their MAC’s guidance at least once every October and whenever a CR is issued that affects hospice claims.