ICD-10 I70.448
Billable / Specific HCC v28: 161 CCAtherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of other part of lower leg
About ICD-10-CM I70.448
ICD-10-CM code I70.448 represents Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of other part of lower leg. This is a billable/specific code in the Circulatory System chapter (block I70). The 2026 edition of ICD-10-CM I70.448 became effective on October 1, 2025.
Coding Tips for I70.448
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I70.448 is a CMS-HCC v28 risk-adjustment code (category 161). 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.
I70.448 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.
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
codes Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of other part of lower leg. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I70.448
Local Coverage Determinations (LCDs) from CMS MACs that list I70.448 as a covered diagnosis.
Showing top 10 of 764 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I70.448.
5 Medicare
CPT Codes Commonly Billed with I70.448
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 11047 CMS LCD: Billing and Coding: Debridement Services CMS LCD
- 11001 CMS LCD: Billing and Coding: Debridement Services CMS LCD
- 11046 CMS LCD: Billing and Coding: Debridement Services CMS LCD
- 11045 CMS LCD: Billing and Coding: Debridement Services CMS LCD
- 11000 CMS LCD: Billing and Coding: Debridement Services CMS LCD
Convert I70.448 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 |
|---|---|---|
| I70.448 | 44031 | 10111 |
| I70.448 | 70719 | 10112 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I70.448
Other codes in section I70-I79 (Diseases of arteries, arterioles and capillaries).
ICD-10 I70.448, Billing FAQ
Is ICD-10 code I70.448 billable? +
Yes, I70.448 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does I70.448 affect Medicare Advantage HCC risk adjustment? +
Yes. I70.448 maps to CMS-HCC v28 category 161. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is I70.448 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 CPT codes are commonly billed with I70.448? +
Procedures frequently paired with I70.448 include: 11047, 11001, 11046, 11045, 11000.
What ICD-9 codes does I70.448 map to? +
Per CMS GEMs, I70.448 maps to ICD-9 codes: 44031, 70719. Useful for legacy data review and historical claim analysis.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team