FY2027 ICD-10-CM reference
E45: Retarded development following protein-calorie malnutrition
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Retarded development following protein-calorie malnutrition. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
Source: E00-E89 (chapter, inherited).
Excludes1
transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Source: E00-E89 (chapter, inherited).
Excludes1
intestinal malabsorption (K90.-)
Source: E40-E46 (section, inherited).
Excludes1
sequelae of protein-calorie malnutrition (E64.0)
Source: E40-E46 (section, inherited).
Excludes2
nutritional anemias (D50-D53)
Source: E40-E46 (section, inherited).
Excludes2
starvation (T73.0)
Source: E40-E46 (section, inherited).
Instructional note
Nutritional short stature
Source: E45 (category, direct).
Instructional note
Nutritional stunting
Source: E45 (category, direct).
Instructional note
Physical retardation due to malnutrition
Source: E45 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does E45 mean in FY2027?
The official ICD-10-CM descriptor is Retarded development following protein-calorie malnutrition. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is E45 billable in FY2027?
The FY2027 order file marks E45 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does E45 map to an HCC?
E45 has no CMS-HCC V28 category in the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service). Under the PY2026 CMS mapping; CMS 2027 initial file unchanged: ESRD HCC 21; no RxHCC category. Coefficients for these models are pending verification for payment year 2027. HHS-HCC: HCC 23 under the HHS-HCC 2026 benefit year mapping (no RAF; HHS-HCC weights vary by metal level). CMS-HCC V24: not used for payment year 2027 Medicare Advantage payment (CMS CY 2027 Rate Announcement). The PACE mapping is still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition