ICD-10 E89.1
Billable / Specific CCPostprocedural hypoinsulinemia
About ICD-10-CM E89.1
ICD-10-CM code E89.1 represents Postprocedural hypoinsulinemia. This is a billable/specific code in the Endocrine, Nutritional, and Metabolic chapter (block E89). The 2026 edition of ICD-10-CM E89.1 became effective on October 1, 2025.
Coding Tips for E89.1
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
E89.1 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under E89.1. Per CMS ICD-10-CM Tabular 2026.
- Postpancreatectomy hyperglycemia
- Postsurgical hypoinsulinemia
Type 1 Excludes
Pure excludes, these codes can never be coded together with E89.1. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- transient postprocedural hyperglycemia (R73.9)
- transient postprocedural hypoglycemia (E16.2)
Use Additional Code
When coding E89.1, also report these additional codes when applicable.
- code, if applicable, to identify:
- acquired absence of pancreas (Z90.41-)
- insulin use (Z79.4)
Coding Notes
Code First
- , if applicable, diabetes mellitus (postpancreatectomy) (postprocedural) (E13.-)
Inpatient DRG Impact, CC
codes Postprocedural hypoinsulinemia. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for E89.1
Local Coverage Determinations (LCDs) from CMS MACs that list E89.1 as a covered diagnosis.
Showing top 10 of 49 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing E89.1.
2 Medicare
1 Aetna
CPT Codes Commonly Billed with E89.1
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert E89.1 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| E89.1 | 2513 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To E89.1
Other codes in section E89 (Postprocedural endocrine and metabolic complications and disorders, not elsewhere classified).
ICD-10 E89.1, Billing FAQ
Is ICD-10 code E89.1 billable? +
Yes, E89.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to E89.1? +
ICD-10 E89.1 includes: Postpancreatectomy hyperglycemia; Postsurgical hypoinsulinemia.
What codes are Type 1 Excludes for E89.1? +
Type 1 Excludes (never code together with E89.1): transient postprocedural hyperglycemia (R73.9); transient postprocedural hypoglycemia (E16.2)
Is E89.1 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does E89.1 map to? +
Per CMS GEMs, E89.1 maps to ICD-9 codes: 2513. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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