I70-I79 — Diseases of arteries, arterioles and capillaries
ICD-10-CM codes I70-I79 cover diseases of arteries, arterioles and capillaries, within diseases of the circulatory system. The block holds 421 codes across 10 categories, of which 344 are billable and 77 are header codes that cannot be submitted on a claim.
Risk adjustment in I70-I79
0 codes in this block map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded. Under-coding here is money left on the table; over-coding here is what audits are for.
- HCC 263 Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene
- HCC 383 Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle
- HCC 264 Vascular Disease with Complications
- HCC 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders
What else to watch in I70-I79
- 160 codes are laterality-specific. They come in left and right pairs, and the pair is mutually exclusive on a single site: coding both without a bilateral code is a contradiction a scrubber should catch before the payer does.
- 340 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.
Categories in I70-I79
- I70Atherosclerosis
- I71Aortic aneurysm and dissection
- I72Other aneurysm
- I73Other peripheral vascular diseases
- I74Arterial embolism and thrombosis
- I75Atheroembolism
- I76Septic arterial embolism
- I77Other disorders of arteries and arterioles
- I78Diseases of capillaries
- I79Disorders of arteries, arterioles and capillaries in diseases classified elsewhere