-ty

DEFINITION of -ty

-ty (and its common variant -ity) is a Latin-derived suffix used to transform an adjective into a noun that describes a state, quality, or condition. Unlike suffixes such as -osis (which typically denotes a pathological process) or -ia (which often denotes a specific medical disease), -ty usually describes a characteristic or a measurable state of being. For example, Toxicity is the state of being toxic, and Obesity is the state of being obese. In clinical documentation, terms ending in -ty are often used to describe the severity or nature of a patient’s condition (e.g., fragility, intensity, morbidity), providing the qualitative data necessary to assign specific ICD-10-CM codes.

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ETYMOLOGY of -ty

latin

Component	Origin	Meaning
-ty / -ity	[Latin] -tas / -tatis ([tās])	“state,” “quality,” or “condition” — used to create abstract nouns.

The suffix entered English via Old French, originating from the Latin -tas. It is a highly productive suffix in both general and medical English. It belongs to a family of “condition-markers” that allow clinicians to move from a description (the adjective “morbid”) to a diagnostic entity (the noun “morbidity”). It is linguistically related to the Greek suffix -sis and -ia, though it carries a more “characteristic” rather than “disease-process” connotation.

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ALIASES / ALTERNATE TERMS

• -ity (the most frequent clinical form; e.g., Toxicity, Elasticity, Morbidity)
• STATE (lay synonym; the condition of being)
• QUALITY (lay synonym; a characteristic property)
• CONDITION (clinical synonym; the state of a patient’s health)

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RELATED TERMS

• -ia — similar meaning (“condition of”); however, -ia is more common in specific disease names (e.g., Insomnia), whereas -ty is used for states (e.g., Toxicity).
• -osis — denotes a condition, but specifically an abnormal or disease process (e.g., Scoliosis).
• -ism — denotes a condition or a belief/practice; often used for metabolic states (e.g., Hyperthyroidism).
• -sis — denotes a process or condition; often refers to a “forming” or “occurring” state (e.g., Diagnosis).
• -ema — denotes a condition, usually involving a fluid or swelling (e.g., Edema).

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CODING CORNER

While [[-ty]] is a root, the terms it forms are central to 2026 medical coding, particularly regarding “state-based” diagnoses and statistical reporting.

ICD-10-CM CODES (Root-Derived Terms)

Toxicity (Toxicity-derived | T-Series)

Code	Description
T38.0-	Toxicity due to systemic medications
T51.0-	Toxic effect of organic solvents (Systemic toxicity)
T65.9-	Other specified toxic effects (General toxicity state)

Obesity (Obesity-derived | E66 Series)

Code	Description
E66.01	Morbid obesity due to undernutrition
E66.9	Obesity, unspecified (The state of being obese)

Morbidity & Mortality (Reporting Metrics)

Note: These are not coded as individual patient diagnoses but are the primary metrics for Hospital Quality Reporting (HQR) and Risk Adjustment.

Term	Coding Impact
Morbidity	Used to calculate the “Comorbidity” index (CC/MCC), which increases the DRG weight for inpatient reimbursement.
Mortality	Used for outcomes-based coding and quality audits.

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COMMON CPT CODES (State-Based Assessment)

CPT Code	Description
80048	Basic Metabolic Panel (Used to assess the toxicity or metabolic state of the patient)
99202-99205	Evaluation and Management (E/M) codes (Levels are determined by the complexity and morbidity of the patient’s state)

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Coding Note: For 2026 guidelines, avoid using generic “condition” or “state” descriptions in the medical record. For example, instead of documenting “toxicity present,” the coder requires a specific agent (e.g., “Acetaminophen toxicity”). When documenting Obesity, the distinction between “Obesity” and “Morbid Obesity” is a critical trigger for higher-weighted DRGs and surgical clearance for bariatric procedures.

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DERIVATIONS of -ty

TABLE definition AS Definition 
WHERE length(filter(roots, (word) => econtains([[]].roots, word))) > 0 AND file.name != [[]].file.name
SORT file.name ASC

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Query

TABLE definition AS Definition
FROM #medroot
WHERE length(filter(definition, (word) => econtains([[]].definition, word))) > 0 AND file.name != [[]].file.name

Med terms dictionary Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms