ICD-10 Z43.1
Billable / Specific HCC v28: 188 CCEncounter for attention to gastrostomy
About ICD-10-CM Z43.1
ICD-10-CM code Z43.1 represents Encounter for attention to gastrostomy. This is a billable/specific code in the Factors Influencing Health Status chapter (block Z43). The 2026 edition of ICD-10-CM Z43.1 became effective on October 1, 2025.
Coding Tips for Z43.1
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Z43.1 is a CMS-HCC v28 risk-adjustment code (category 188). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Z43.1 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.
Type 2 Excludes
Not included here, the excluded code is not part of Z43.1, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- artificial opening status only, without need for care (Z93.-)
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Inpatient DRG Impact, CC
code Encounter for attention to gastrostomy. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for Z43.1
Local Coverage Determinations (LCDs) from CMS MACs that list Z43.1 as a covered diagnosis.
Showing top 10 of 91 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z43.1.
2 Medicare
CPT Codes Commonly Billed with Z43.1
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 Z43.1 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 |
|---|---|---|
| Z43.1 | V551 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Z43.1
Other codes in section Z40-Z53 (Encounters for other specific health care).
ICD-10 Z43.1, Billing FAQ
Is ICD-10 code Z43.1 billable? +
Yes, Z43.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 2 Excludes for Z43.1? +
Type 2 Excludes (may be coded together when both conditions exist): artificial opening status only, without need for care (Z93.-)
Does Z43.1 affect Medicare Advantage HCC risk adjustment? +
Yes. Z43.1 maps to CMS-HCC v28 category 188. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is Z43.1 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 Z43.1 map to? +
Per CMS GEMs, Z43.1 maps to ICD-9 codes: V551. 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 June 1, 2026.
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