The word “atypical” may make a serious eating disorder sound unusual or less concerning. In reality, atypical anorexia can involve the same feelings of distress, restrictive patterns, weight concerns or dysmorphia, and medical instability associated with anorexia nervosa.
When looking at atypical anorexia vs anorexia nervosa, clinicians investigate more than what someone looks like. The main distinction between these two conditions is how each fits current diagnostic criteria. Then, to determine the right treatment, the person needs a thorough clinical assessment.
What’s Anorexia Nervosa, and Why Does It Matter?
When someone asks, “What is anorexia nervosa?” the answer is relatively straightforward. Anorexia nervosa is defined as a serious eating disorder in which the individual heavily restricts intake, has an intense fear of gaining weight, exhibits persistent behaviors that interfere with weight gain, and has a distorted understanding of a body’s weight or shape (also called body dysmorphia). The diagnostic criteria also require significantly low body weight relative to the person’s health and development.
The National Institute of Mental Health explains that eating disorders can become life-threatening and are sometimes associated with medical complications. They sometimes also involve co-occurring mental health conditions. A person’s appearance alone doesn’t necessarily reflect what’s going on physically or mentally inside the body.
What Is Atypical Anorexia?
Because they sound similar, it’s common to ask, “What is atypical anorexia?” This condition is different because it’s similar to anorexia nervosa but without the low-body-weight criterion. A person may experience significant weight loss and serious physical or emotional effects while technically being above the threshold used to diagnose anorexia nervosa.
Because of the unusual presentation, atypical anorexia can sometimes go undiagnosed as family members, friends, and even healthcare professionals miss early warning signs. That’s why Aster Springs also supports better nutrition as a potential treatment goal while addressing malnutrition in atypical anorexia.
Atypical Anorexia and OSFED
Under the atypical anorexia DSM-5 framework, the condition appears within other specified feeding or eating disorder (OSFED). The DSM-5 criteria summarized by the Agency for Healthcare Research and Quality distinguish atypical anorexia because the features of anorexia nervosa are present, but body weight is not considered significantly low.
At Aster Springs, clients receive treatment for OSFED and other eating disorders based on their needs, not just based on appearance.
How Atypical Anorexia Is Diagnosed
An atypical anorexia diagnosis requires a complete evaluation by qualified professionals. The assessment considers a range of factors, including eating patterns, weight history, thoughts about food and body image, emotional symptoms, physical findings, and how these experiences affect daily life.
Before diagnosing, clinicians must evaluate the client’s medical stability and rule out other possible causes. No single appearance, number on the scale, or symptom tells the whole story about a person’s health, which is why early, weight-inclusive screening matters.
Which Condition Is More Serious?
A 2023 systematic review in the Journal of Eating Disorders found that medical instability can take place in both typical and atypical adolescent anorexia or adult typical or atypical anorexia, even among people who are not at a low body weight.
Risk varies from person to person and depends on the speed and extent of changes, current symptoms, lab findings, heart function, and other clinical factors. Any signs of medical instability mean a client needs a prompt professional evaluation.
Does Treatment Differ for Atypical Anorexia vs Anorexia Nervosa?
Both conditions are treated by looking at the eating disorder’s physical, psychological, and behavioral effects. Clients may receive medical monitoring, nutrition rehabilitation, individual or family therapy, group therapy, and support for co-occurring conditions. A client’s needs depend on factors such as age, medical needs, symptoms, support system, and the appropriate level of care. Both anorexia nervosa treatment and atypical anorexia care should be individualized, evidence-based, and free from assumptions tied to body size.
Trauma-Informed Treatment at Aster Springs
Aster Springs provides clients with gentle, trauma-informed eating disorder treatment in residential and outpatient settings. Its clinical teams address medical, psychological, and behavioral needs together while managing symptoms of an eating disorder or co-occurring disorders.
If you or someone you love is showing signs of anorexia, reach out to the admissions team at Aster Springs to discuss an appropriate level of care. Recovery is possible with the right support.
Frequently Asked Questions About Atypical Anorexia
Can you have anorexia without being underweight?
Yes, it’s possible to have atypical anorexia without having a significantly low body weight. The absence of a low body weight doesn’t rule out serious emotional distress, malnutrition, medical instability, or other issues. Anyone showing warning signs deserves a complete assessment as soon as possible.
Is atypical anorexia a real eating disorder?
Both anorexia nervosa and atypical anorexia are real eating disorders. Atypical anorexia is a recognized eating disorder included within the OSFED category in the DSM-5 and DSM-5-TR. “Atypical” refers to how the diagnosis is classified and doesn’t mean the condition is less genuine or clinically significant. Both anorexia and atypical anorexia are real conditions.
Which condition is more dangerous?
Neither atypical anorexia nor anorexia nervosa is more or less dangerous than the other, and both can lead to serious medical and psychological complications. An individual’s risk depends on their health history, co-occurring disorders, and other factors. Both conditions can be treated and should be diagnosed by a medical professional due to the potential for life-threatening symptoms.
How is atypical anorexia diagnosed?
A qualified professional diagnoses atypical anorexia by looking at the client’s eating patterns, weight history, thoughts and emotions, physical symptoms, and how they function in daily life. They may also look at whether or not features of anorexia nervosa are present and the low-body-weight criterion applies. Depending on the situation, the clinician may also order medical tests to determine the client’s medical stability and set the initial level of care.
Does treatment differ between atypical anorexia and anorexia nervosa?
Because atypical anorexia and anorexia nervosa can affect physical and emotional health, core treatments often overlap. However, each plan is individualized based on the client’s symptoms, medical status, support needs, and treatment goals.
