F50.019 ICD-10-CM Code: Anorexia nervosa, restricting type, unspecified
F50.019 maps to CMS-HCC V28 153. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
F50.019
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAnorexia nervosa, restricting type, unspecified
Anorexia nervosa of the restricting type, but the severity level (mild, moderate, severe, extreme, or remission status) is not specified in the documentation.
Buddy Insight
Anorexia nervosa, restricting type involves weight loss achieved primarily through dieting, fasting, or excessive exercise without binge eating or purging behaviors.
CMS-HCC V28
MappedHCC 153
Coefficient HCC 153: 0.396 (Community Non-Dual Aged (CNA))
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
Context neededHCC 094
Coefficient needs member context
ESRD/PACE
N/A—
Not mapped
RXHCC
MappedHCC 133
Code-level coefficient reference
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for F50.019. Check the code and parent instructions in the Code Book.
Excludes 2
Official- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)Inherited from F01-F99, F50
- feeding difficulties (R63.3-)Inherited from F01-F99, F50
- feeding disorder in infancy or childhood (F98.2-)Inherited from F01-F99, F50
Related Codes
Includes
Official- disorders of psychological developmentInherited from F01-F99
Excludes 1
Official- anorexia NOS (R63.0)Inherited from F50, F50.0
- feeding problems of newborn (P92.-)Inherited from F50, F50.0
- polyphagia (R63.2)Inherited from F50, F50.0
- loss of appetite (R63.0)Inherited from F50, F50.0
- psychogenic loss of appetite (F50.89)Inherited from F50, F50.0
Code First
OfficialNo Code First sequencing instructions are included in this display for F50.019. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for F50.019. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for F50.019. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is F50.019 an HCC code?
Yes. F50.019 (Anorexia nervosa, restricting type, unspecified) maps to HCC 153, Personality Disorders; Anorexia/Bulimia Nervosa under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.396. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.
Coder answer: F50.019 is billable and maps to V28 HCC 153, Personality Disorders; Anorexia/Bulimia Nervosa. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- F50.019
- Description
- Anorexia nervosa, restricting type, unspecified
- HCC (V28)
- HCC 153 — Personality Disorders; Anorexia/Bulimia Nervosa
- RAF reference coefficient
- 0.396
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work F50.019 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for F50.019
For F50.019, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Coder workflow notes
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What This Code Means
F50.019 is the ICD-10-CM diagnosis code for anorexia nervosa, restricting type, unspecified. Anorexia nervosa of the restricting type, but the severity level (mild, moderate, severe, extreme, or remission status) is not specified in the documentation. F50.019 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering behavioral syndromes associated with physiological disturbances and physical factors (f50-f59).
Under the CMS-HCC V28 risk adjustment model, F50.019 maps to Personality Disorders; Anorexia/Bulimia Nervosa (HCC 153) with a source-labeled community, non-dual, aged reference coefficient of 0.396. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.
This is an unspecified severity code; query the provider to determine the appropriate severity level if possible. For F50.019, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for F50.019 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is an unspecified severity code; query the provider to determine the appropriate severity level if possible
- •Review clinical notes for indicators of severity such as BMI, functional impairment, and medical complications
Clinical Significance
Anorexia nervosa, restricting type involves weight loss achieved primarily through dieting, fasting, or excessive exercise without binge eating or purging behaviors. Unspecified severity indicates the restricting type is documented but the provider has not specified the severity level. This subtype carries significant risk for malnutrition, cardiac arrhythmias, and osteoporosis.
Documentation Requirements
- ✓Documentation of restricting behaviors (dieting, fasting, excessive exercise) WITHOUT binge eating or purging
- ✓Current BMI or weight documenting severity level (BMI not specified)
- ✓Distorted body image or intense fear of weight gain
- ✓Duration and course of illness
- ✓Medical monitoring results (vital signs, electrolytes, cardiac evaluation)
Commonly Confused Codes
- •F50.02x (Anorexia nervosa, binge eating/purging type): use when binge/purge behaviors are present in addition to restriction
- •F50.00 (Anorexia nervosa, unspecified): use F50.01x when restricting type is specifically documented
- •F50.82 (Avoidant/restrictive food intake disorder): food restriction NOT driven by body image disturbance or fear of weight gain
- •R63.0 (Anorexia): medical loss of appetite, NOT the psychiatric eating disorder
- •E44.0-E44.1 (Protein-calorie malnutrition): may coexist; code both when documented