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Diagnosis vs. Diagnoses: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Updated on December 25, 2023
"Diagnosis" refers to the identification of a disease or condition, while "Diagnoses" is the plural form, indicating multiple such identifications.
Diagnosis vs. Diagnoses

Key Differences

"Diagnosis" is a singular noun used when identifying a specific disease or condition based on its symptoms and signs. "Diagnoses," on the other hand, is the plural form of diagnosis, used when referring to multiple cases or instances of identifying diseases or conditions.
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Shumaila Saeed
Dec 01, 2023
In medical practice, a doctor makes a "diagnosis" after assessing a patient's symptoms. However, in cases where multiple patients or conditions are involved, the doctor may discuss several "diagnoses," each pertaining to a different patient or disease.
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The process of arriving at a "diagnosis" involves clinical evaluation and sometimes tests. When multiple patients are evaluated, the doctor may reach different "diagnoses" for each, depending on their unique symptoms and test results.
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In medical reports, a single patient's condition is described as a "diagnosis." In contrast, in a research paper discussing various case studies, the term "diagnoses" would be used to refer to the different conditions identified across the study.
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Dec 01, 2023
The accuracy of a "diagnosis" is crucial for effective treatment. When comparing the health trends in a population, epidemiologists may analyze various "diagnoses" to identify common diseases and their causes.
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Comparison Chart

Number

Singular
Plural
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Usage in Context

Refers to one disease or condition
Refers to multiple diseases or conditions
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Example in a Sentence

"The doctor's diagnosis was pneumonia."
"The clinic reported several diagnoses today."
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Grammatical Role

Subject or object in singular form
Subject or object in plural form
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Relevance in Reporting

Used for individual patient's condition
Used in discussing multiple cases or studies
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Diagnosis and Diagnoses Definitions

Diagnosis

A decision reached from an analysis of symptoms.
Her diagnosis came after several tests.
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Nov 27, 2023

Diagnoses

A set of medical conditions identified in patients.
The clinic handled several diagnoses today.
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Nov 27, 2023

Diagnosis

The conclusion of a medical examination.
The diagnosis revealed a mild infection.
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Diagnoses

Multiple determinations of health conditions.
Different diagnoses were made for the symptoms.
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Diagnosis

Naming a disease or condition from its signs.
His diagnosis was confirmed by specialists.
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Diagnoses

Plural of diagnosis, indicating multiple identifications of diseases.
The various diagnoses included flu and bronchitis.
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Diagnosis

Identification of a disease by examination of symptoms.
The doctor's diagnosis of diabetes was based on blood tests.
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Diagnoses

Multiple conclusions from different medical examinations.
Their diagnoses ranged from common cold to asthma.
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Diagnosis

The process of determining a medical condition.
Accurate diagnosis is key to effective treatment.
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Diagnoses

A collection of identified diseases or conditions.
The conference discussed rare diagnoses.
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Diagnosis

The act or process of identifying or determining the nature and cause of a disease or injury through evaluation of patient history, examination, and review of laboratory data.
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Oct 19, 2023

Diagnoses

The act or process of identifying or determining the nature and cause of a disease or injury through evaluation of patient history, examination, and review of laboratory data.
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Oct 19, 2023

Diagnosis

The opinion derived from such an evaluation.
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Diagnoses

The opinion derived from such an evaluation.
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Diagnosis

A critical analysis of the nature of something.
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Diagnoses

A critical analysis of the nature of something.
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Diagnosis

The conclusion reached by such analysis.
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Diagnoses

The conclusion reached by such analysis.
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Diagnosis

(Biology) A brief description of the distinguishing characteristics of an organism, as for taxonomic classification.
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Oct 19, 2023

Diagnoses

(Biology) A brief description of the distinguishing characteristics of an organism, as for taxonomic classification.
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Oct 19, 2023

Diagnosis

(medicine) The identification of the nature and cause of an illness.
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Oct 19, 2023

Diagnoses

To distinguish or identify (a disease, for example) by diagnosis.
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Oct 19, 2023

Diagnosis

The identification of the nature and cause of something (of any nature).
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Diagnoses

To identify (a person) as having a particular disease or condition by means of a diagnosis.
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Diagnosis

(taxonomy) A written description of a species or other taxon serving to distinguish that species from all others; especially a description written and published in Latin.
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Diagnoses

To analyze the nature or cause of
Diagnose the reasons for an economic downturn.
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Diagnosis

Synonym of diagnose
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Diagnoses

To make a diagnosis.
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Diagnosis

The art or act of recognizing the presence of disease from its signs or symptoms, and deciding as to its character; also, the decision arrived at.
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Diagnosis

Hence, the act or process of identifying the nature or cause of some phenomenon, especially the abnormal behavior of an animal or artifactual device; as, diagnosis of a vibration in an automobile; diagnosis of the failure of a sales campaign; diagnosis of a computer malfunction.
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Diagnosis

Scientific determination of any kind; the concise description of characterization of a species.
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Diagnosis

Critical perception or scrutiny; judgment based on such scrutiny; esp., perception of, or judgment concerning, motives and character.
The quick eye for effects, the clear diagnosis of men's minds, and the love of epigram.
My diagnosis of his character proved correct.
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Diagnosis

Identifying the nature or cause of some phenomenon
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Repeatedly Asked Queries

Can a diagnosis change?

Yes, with new information, a diagnosis can change.
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What is a diagnosis?

Identification of a disease from symptoms.
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Is a diagnosis always correct?

Not always; it can be revised with new evidence.
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Can anyone make a diagnosis?

Only qualified healthcare professionals should.
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How is a diagnosis made?

Through examination of symptoms and medical tests.
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How are diagnoses used in research?

To study disease patterns and treatment outcomes.
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What are diagnoses?

Plural of diagnosis, indicating multiple disease identifications.
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Can a diagnosis be preventive?

Yes, early diagnosis can prevent disease progression.
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Why are accurate diagnoses important?

They are crucial for appropriate treatment and management.
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Is diagnosis the same as treatment?

No, diagnosis identifies the problem; treatment addresses it.
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Can there be multiple diagnoses for one patient?

Yes, a patient can have multiple diagnoses.
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What is differential diagnosis?

Considering different diseases that have similar symptoms.
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How do cultural factors influence diagnoses?

Cultural factors can affect symptom expression and interpretation.
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What role do diagnoses play in healthcare?

They guide treatment decisions and healthcare planning.
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Are diagnoses confidential?

Yes, they are part of confidential medical records.
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How does technology affect diagnoses?

It improves accuracy and speed of identification.
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Can diagnoses vary between doctors?

Yes, based on interpretation of symptoms and tests.
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Can mental health have a diagnosis?

Yes, mental health conditions can be diagnosed.
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Why is a second opinion important in diagnoses?

To confirm or reconsider the initial diagnosis.
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Do all symptoms lead to a diagnosis?

Not always; some symptoms may be non-specific.
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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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