Guide: How to Say “Diagnosis” in its Plural Form

Have you ever wondered about the correct way to say “diagnosis” when referring to multiple diagnoses? In this guide, we will explore both the formal and informal ways of expressing the plural form of “diagnosis.” While regional variations may exist, we will primarily focus on the commonly used terminology. So, let’s dive in and learn how to correctly use the plural form of the word “diagnosis.”

1. Formal Ways to Say “Diagnosis” in its Plural Form

When communicating in formal contexts, such as academic or professional settings, it is essential to use proper language and terminology. Here are a few examples of how to express the plural form of “diagnosis” in a formal manner:

  • Diagnoses: This is the most common formal way to express the plural of “diagnosis.” It adheres to standard English grammar rules and is widely accepted.
  • Diagnostic assessments: This phrase can be used when discussing multiple diagnostic evaluations or tests.
  • Multiple diagnoses: This phrase emphasizes the fact that there are several different diagnoses being considered or discussed.

2. Informal Ways to Say “Diagnosis” in its Plural Form

In informal contexts, such as casual conversations or everyday interactions, people tend to use less formal language. When it comes to the plural form of “diagnosis,” there are a few commonly used informal expressions:

  • Diagnosises: While not grammatically correct in standard English, some individuals may use this form in informal speech. However, it’s important to note that using “diagnosises” may not be widely accepted or recognized.
  • Multiple diagnoses: Similar to the formal usage mentioned earlier, this phrase is also commonly used in informal settings. It clearly conveys the idea of multiple diagnoses without deviating from proper grammar.
  • Diagnosis results: This informal phrase focuses on the outcome or findings of multiple diagnoses.

Tip: When in doubt, it is usually best to stick to the formal way of expressing the plural form of “diagnosis.” This ensures clarity and a proper understanding of your intended meaning in most situations.

3. Examples of Using “Diagnosis” in its Plural Form

Let’s take a look at some examples to understand how the plural form of “diagnosis” can be used in various contexts:

  • Formal: The doctors made several diagnoses based on the patient’s symptoms and test results.
  • Informal: I received multiple diagnoses from different specialists, but they all confirmed the same condition.
  • Formal: The hospital conducted numerous diagnostic assessments to identify potential health issues in the community.
  • Informal: My uncle went for diagnosis results yesterday, and fortunately, they ruled out anything serious.


Expressing the plural form of “diagnosis” correctly is crucial in both formal and informal settings. In formal contexts, “diagnoses” is the most widely accepted and commonly used term. However, in informal conversations, terms like “multiple diagnoses” or “diagnosis results” can also be used without deviating significantly from proper grammar rules.

Remember, when in doubt about which term to use, it is generally better to opt for the formal expression. Consistency in language usage allows for clear communication and reduces the chance of confusion. Therefore, whether you are discussing multiple diagnoses in a medical report, academic paper, or casual conversation, understanding the appropriate terminology enhances effective communication.

Written by Ava Lucille

Hello there! I’m Ava, a passionate wordsmith with a fascination for language intricacies. When I'm not writing comprehensive guides on how to pronounce words or use phrases in various contexts, I’m dishing out tips on effective communication or exploring ways to express sentiment. In my spare time, I love to travel the world, gaining firsthand experiences of how language shapes our lives. I enjoy the challenge of decoding hard-to-pronounce words, learning new languages, and diving into the cultural backgrounds of phrases we commonly use. I believe, language is more than just words—it’s the soul of communication. Let's unravel it together!

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