E87.22 ICD-10-CM Code: Chronic metabolic acidosis
E87.22 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)
E87.22
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceChronic metabolic acidosis
A long-term condition where the blood becomes too acidic due to metabolic problems, such as kidney disease or diabetes complications.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Chronic lactic acidosis
Excludes 2
Official- Ehlers-Danlos syndromes (Q79.6-)Inherited from E70-E88
Related Codes
Includes
OfficialNo Includes notes are included in this display for E87.22. Check the code and parent instructions in the Code Book.
Excludes 1
Official- transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E70-E88, E87, E87.2
- androgen insensitivity syndrome (E34.5-)Inherited from E00-E89, E70-E88, E87, E87.2
- congenital adrenal hyperplasia (E25.0)Inherited from E00-E89, E70-E88, E87, E87.2
- hemolytic anemias attributable to enzyme disorders (D55.-)Inherited from E00-E89, E70-E88, E87, E87.2
- Marfan syndrome (Q87.4-)Inherited from E00-E89, E70-E88, E87, E87.2
- 5-alpha-reductase deficiency (E29.1)Inherited from E00-E89, E70-E88, E87, E87.2
- diabetes insipidus (E23.2)Inherited from E00-E89, E70-E88, E87, E87.2
- electrolyte imbalance associated with hyperemesis gravidarum (O21.1)Inherited from E00-E89, E70-E88, E87, E87.2
- electrolyte imbalance following ectopic or molar pregnancy (O08.5)Inherited from E00-E89, E70-E88, E87, E87.2
- familial periodic paralysis (G72.3)Inherited from E00-E89, E70-E88, E87, E87.2
- metabolic acidemia in newborn, unspecified (P19.9)Inherited from E00-E89, E70-E88, E87, E87.2
- diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosisInherited from E00-E89, E70-E88, E87, E87.2
Code First
Official- underlying etiology, if applicable
Use Additional
OfficialNo Use Additional Code instructions are included in this display for E87.22. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for E87.22. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
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 E87.22 an HCC code?
No. E87.22 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- E87.22
- Description
- Chronic metabolic acidosis
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
E87.22 is the ICD-10-CM diagnosis code for chronic metabolic acidosis. A long-term condition where the blood becomes too acidic due to metabolic problems, such as kidney disease or diabetes complications. E87.22 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).
E87.22 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Verify the underlying cause (kidney disease, diabetes, etc.) and code it separately if documented.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E87.22 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the underlying cause (kidney disease, diabetes, etc.) and code it separately if documented
- •This is specifically for chronic cases; acute metabolic acidosis uses different codes
Code First
- underlying etiology, if applicable