Home Health & AI Glossary

In ICD-10-CM, the word "and" is interpreted to mean "and/or." This means that either one condition alone or both conditions together may satisfy the

The word "with" in ICD-10-CM means "associated with" or "due to." The classification assumes a causal relationship between two conditions when they are

A 30-Day Payment Period is the unit of reimbursement under PDGM. Medicare pays home health agencies separately for each 30-day period based on the patient's clinical characteristics and visit utilization.

The payment period used under the Medicare home health prospective payment system.

A 30-day readmission is an unplanned return to an acute care hospital within 30 days of an inpatient discharge. Medicare tracks readmissions at both the hospital and post-acute level, and the metric shapes referral relationships, value-based payment adjustments, and public quality reporting. For home health agencies, keeping recently discharged patients out of the hospital is both a clinical responsibility and a growth strategy.

The 36-month rule is a Medicare enrollment regulation (42 CFR 424.550(b)) that applies when majority ownership of a home health agency changes within 36 months of its initial enrollment or its most recent change in majority ownership. When triggered, the Medicare provider agreement and billing privileges do not transfer to the buyer, who must instead enroll as a brand-new provider and complete a new state survey or accreditation.

The 5-day assessment window is the regulatory deadline for completing the start of care comprehensive assessment, including the OASIS: within 5 days after the start of care date, where the SOC date counts as day 0. A parallel 5-day window applies at recertification, when the assessment must be completed during the last 5 days of each 60-day certification period.

The 60-day certification period is the length of time a physician or allowed practitioner certifies a patient's need for home health care in a single certification. Under PDGM (the Patient-Driven Groupings Model), each 60-day certification period contains two 30-day payment periods. Care continuing beyond day 60 requires a recertification, supported by a recertification OASIS assessment and an updated plan of care.

An Abscess is a localized collection of pus caused by infection

Abstracting is the process of reviewing medical records and extracting key clinical information, including diagnoses, procedures, demographics, and other key data elements for coding and reporting.

Access Control is the process of restricting access to patient information based on a user's role, responsibilities, and authorization level within the EMR

Provider group responsible for care quality and cost outcomes.

Accounts Receivable (A/R) represents the outstanding payments owed to a home health agency for services that have been billed but not yet collected

Accounts Receivable (A/R) represents money owed to an agency for services that have already.

Accounts Receivable (AR) represents the money owed to a home health agency for services.

Accreditation is a voluntary evaluation in which a CMS-approved accrediting organization certifies that a home health agency meets standards that meet or exceed the Medicare Conditions of Participation. For home health, the three accreditors with CMS deeming authority are the Accreditation Commission for Health Care (ACHC), Community Health Accreditation Partner (CHAP), and The Joint Commission (TJC). Accredited agencies with deemed status are surveyed by their accreditor instead of the state for routine certification purposes.

An Accrediting Organization (AO) evaluates healthcare providers against published standards and may receive CMS deeming authority for specified provider types.

An Active Diagnosis is a medical condition that currently exists and requires ongoing clinical attention, including evaluation, monitoring, medication

Basic self care tasks like bathing, dressing, eating, and walking.

Basic everyday activities such as bathing, dressing, eating, toileting, and moving around.

An Activity Code identifies the activity the patient was performing when an injury or other health event occurred

An actuarially equivalent (AE) plan is a Part D prescription drug plan structured differently from the Part D Standard Benefit but that, on a fiscal basis, provides coverage at least as valuable as the Standard Benefit. Such plans often keep the standard deductible while using different cost-sharing, such as tiered copays.

Federal standard requiring Medicaid managed care capitation rates to be adequate and appropriate.

The acute care hospitalization (ACH) rate is the percentage of home health stays during which the patient was admitted to an acute care hospital, historically measured over the first 60 days of home health. It is a claims-based, risk-adjusted measure that served for years as the industry's headline utilization metric before CMS began shifting to the Potentially Preventable Hospitalization measure.

An Acute Condition is a disease, illness, or injury with a sudden onset that generally requires immediate or short-term treatment

Acute Condition Documentation describes newly developed or short-term illnesses, injuries, or exacerbations that require immediate evaluation or

Acute Kidney Injury (AKI) Coding identifies sudden declines in kidney function resulting from dehydration, infection, medication toxicity, surgery, or other acute causes.

An Additional Diagnosis is any clinically relevant condition documented during the episode of care that impacts assessment, treatment, monitoring, or

Formal request from Medicare or another payer asking a provider to submit medical records.

The Additional Low Income Medicare Beneficiary (ALMB) program is a Medicare Savings Program that pays the Medicare Part B monthly premium for beneficiaries who meet its income test. It is also known as the Qualifying Individual (QI) program and, because it depends on annual funding, is generally operated on a first-come, first-served basis.

An Activities of Daily Living (ADL) Assessment evaluates a patient's ability to independently perform essential self-care tasks such as bathing, dressing, grooming, and eating.

Time and effort spent on administrative tasks such as documentation, coordination, and paperwork.

An Administrative Law Judge (ALJ) presides over Medicare appeal hearings at the third level of the appeals process, with authority to administer oaths, take testimony, rule on evidence, and make findings of fact. ALJ review is available after a reconsideration decision when the amount in controversy meets the applicable threshold.

Formal start of services for a patient.

Initial evaluation of patient condition and care needs.

The Admission Diagnosis is the condition documented at the time a patient is admitted for evaluation or treatment

Records completed as part of admitting a patient to home health services.

Admission Rate measures how many eligible referred patients are successfully admitted into.

Admission Source identifies where the patient came from immediately before starting home health services

Admission volume is the number of new patients a home health agency admits in a given period, counted at the completed start of care visit. It is the top of the census engine: admissions minus discharges determines whether the agency grows, and nearly every growth initiative ultimately has to show up in this number.

The Admission Workflow is the sequence of activities required to admit a patient into a home health agency, including referral review, insurance

An Additional Documentation Request (ADR) is a formal request from Medicare or one of its contractors asking a home health agency to submit records that support a billed claim.

Notice given when Medicare may not cover a service.

Legal document that communicates a patient's healthcare wishes in the event they are unable.

ACA marketplace subsidy that lowers your monthly health insurance premium.

A Medicaid managed care plan decision to deny, reduce, or end services.

An Adverse Drug Event (ADE) is an injury or harmful outcome resulting from the use of a medication, including side effects, medication errors, allergic

Injury or harmful outcome associated with the use of a medication.

An Adverse Effect is an unintended harmful reaction that occurs when a medication is correctly prescribed and properly administered at the recommended dosage.

Unexpected harmful patient care outcome.

Adverse event measures are OASIS-derived quality indicators that flag rare, potentially preventable negative outcomes, such as emergent care for an injury caused by a fall or a substantial decline in function during the episode. Unlike publicly reported outcome measures, they are designed as internal warning signals: each flagged case is meant to trigger a chart review, not a rate comparison.

2010 law, also called Obamacare, that expanded access to health insurance.

An Aftercare Code (typically a Z code) is assigned when a patient is receiving continued care after the active treatment phase of a condition has ended.

Person responsible for overseeing the overall administrative and operational management.

Total number of active patients receiving services from a home health agency during a specific.

Agency Profitability measures the financial performance of a home health agency after.

A software system designed to perform tasks or workflows using AI and, in some cases, external tools.

Automated warning generated from data or documentation.

AI support for selecting accurate billing or diagnosis codes.

Systematic differences in AI outputs that can result from data, design, or other factors.

AI Clinical Documentation is the use of artificial intelligence to assist clinicians with creating, reviewing, organizing, and improving patient documentation.

AI Documentation refers to the use of artificial intelligence to assist clinicians in creating, organizing, reviewing, and improving clinical documentation.

Tool that helps clinicians create or improve notes.

Policies, processes, controls, and oversight used to manage AI responsibly within an organization.

An AI-generated statement that appears plausible but is inaccurate or unsupported by the available information.

Artificial intelligence (AI) in home health is the application of machine learning and large language models to agency workflows: drafting visit documentation, suggesting ICD-10 codes, flagging OASIS inconsistencies, optimizing schedules, and predicting hospitalization risk. Adoption accelerated sharply after 2023 as language models became capable of handling clinical narrative, the dominant data type in home health.

Recommendations or observations generated by artificial intelligence after analyzing clinical.

AI Quality Assurance involves using artificial intelligence to review clinical documentation for accuracy, completeness, compliance, consistency, and

AI based prediction of patient or operational risk.

Practices designed to reduce harmful, unreliable, or unintended AI behavior.

An AI Scribe is an AI-powered application that listens to clinician-patient conversations or clinician dictation and automatically generates structured

Using AI or automated rules to check information for potential errors, inconsistencies, or missing elements.

Use of artificial intelligence to support clinicians in developing individualized plans.

AI-Powered Clinical Decision Support combines artificial intelligence with evidence-based clinical guidelines to provide recommendations, alerts

Instructions for home health aide services.

RN oversight of aide care quality and performance.

An Alcohol Use Code reports alcohol use, alcohol dependence, alcohol abuse, or a history of alcohol-related conditions based on provider documentation

Step based logic used by software or AI.

APR-DRGs (All Patient Refined Diagnosis-Related Groups) are a patient classification system used by many state Medicaid programs and private payers.

Allergy Documentation records known patient allergies and adverse reactions to medications, foods, environmental substances, or other allergens within

Allowed practitioners are nurse practitioners (NPs), physician assistants (PAs), and clinical nurse specialists (CNSs) who are permitted to certify eligibility, order services, and establish and review the plan of care for Medicare home health patients. The authority was granted permanently by the CARES Act in 2020 and operates within each state's scope of practice laws.

The Alphabetic Index is the alphabetical listing of diseases, conditions, symptoms, injuries, and external causes found within the ICD-10-CM manual.

Alzheimer's Disease is the most common cause of dementia and is a progressive neurodegenerative disorder affecting memory, cognition, and functional

Alzheimer's Disease Coding identifies Alzheimer's disease as the underlying diagnosis and often requires an additional code for associated dementia or behavioral disturbances.

Ambient Documentation uses AI to automatically capture conversations between clinicians and patients during a visit and convert them into structured

Patient's ability to walk or move from one location to another.

An Ambulation Assessment specifically evaluates a patient's walking ability, gait, endurance, balance, speed, and need for mobility aids or assistance.

The American Health Information Management Association (AHIMA) is a professional organization that supports health information management professionals.

The American Hospital Association (AHA) is one of the Cooperating Parties responsible for ICD-10-CM coding guidance in the United States.

Rule that a state Medicaid benefit must be sufficient to reasonably achieve its purpose.

The Annual Coordinated Election Period (ACEP) is the yearly window, running October 15 to December 7, during which Medicare beneficiaries can join, switch, or drop Medicare Advantage (Part C) and prescription drug (Part D) plans, with changes effective January 1. It is more commonly called the Annual Election Period (AEP).

The Annual Election Period (AEP) is the October 15 to December 7 window each year when Medicare beneficiaries can enroll in or change Medicare Advantage and Part D plans. It is the same period formally known as the Annual Coordinated Election Period (ACEP).

Annual ICD-10-CM Updates are revisions released each fiscal year that may add new diagnosis codes, revise existing code descriptions, delete obsolete codes, and update guidelines.

Yearly notice of Medicare Advantage or Part D plan changes, sent by September 30.

The Anti-Kickback Statute (AKS) is a federal criminal law that prohibits knowingly offering, paying, soliciting, or receiving anything of value to induce or reward referrals of business payable by federal health care programs such as Medicare and Medicaid. Because home health agencies live on referrals, the AKS shapes how they can compensate liaisons and medical directors and how they interact with referral sources. This page is educational and general; it is not legal advice.

Anxiety Disorder Coding includes diagnosis coding for generalized anxiety disorder, panic disorder, phobias, social anxiety disorder, and other anxiety-related conditions.

API Integration allows different healthcare software applications to securely exchange data and communicate with each other through Application

Request to reverse a payer denial decision.

The decision a Medicaid managed care plan makes about an appeal.

Arrhythmia Coding involves assigning diagnosis codes for abnormal heart rhythms, including atrial fibrillation, atrial flutter, ventricular arrhythmias, and conduction disorders.

An Arterial Ulcer is a wound caused by inadequate arterial blood flow, usually resulting from peripheral arterial disease

Technology capable of analyzing information, identifying patterns, generating content.

AI Coding refers to the use of artificial intelligence technologies to analyze clinical documentation, recommend diagnosis codes, identify documentation gaps, and improve coding accuracy.

AI Documentation uses artificial intelligence to assist clinicians in generating clinical notes.

Aspiration Risk is the likelihood that food, liquids, saliva, or medications may enter the airway instead of the esophagus, potentially leading to

Review of patient health, function, and care needs.

Objective and subjective clinical observations collected during a patient evaluation.

Maximum countable resources allowed to qualify for Medicaid.

Provider agreement to accept the Medicare-approved amount as full payment.

Equipment designed to help a patient perform activities or move more safely and independently.

Asthma is a chronic inflammatory disease of the airways characterized by episodes of wheezing, coughing, chest tightness, and shortness of breath

Asthma Coding requires documentation of asthma severity and whether the patient is experiencing an exacerbation or status asthmaticus.

Atrial Fibrillation (AFib) is an irregular heart rhythm originating in the atria

State of having accurate, complete, organized.

Likelihood that a home health agency will be selected for review because of unusual billing patterns.

Record of system actions, edits, and changes.

Payer approval for requested care or services.

Process of obtaining, tracking, and maintaining required payer authorizations for covered services.

The length of time a Medicaid plan agrees to cover authorized services.

Auto-enrollment is the process by which CMS automatically places dual eligible and other Low Income Subsidy individuals into Part D coverage so they are not left without a drug plan. Beneficiaries are typically enrolled first into a temporary transition plan and then into a qualifying benchmark plan.