Is R79.1 a billable ICD-10-CM code?

Yes. R79.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R79.1 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on examination of blood, without diagnosis (R70-R79).

What cannot be coded together with R79.1?

R79.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R79.1

R79.1 — Abnormal coagulation profile

Billable / specific codeICD-10-CM

R79.1 is a billable, specific ICD-10-CM code for abnormal coagulation profile. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

coagulation defects (D68.-)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

abnormality of fluid, electrolyte or acid-base balance (E86-E87)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Abnormal or prolonged bleeding time
Abnormal or prolonged coagulation time
Abnormal or prolonged partial thromboplastin time [PTT]
Abnormal or prolonged prothrombin time [PT]
Low von Willebrand factor

Other codes that can never be billed with R79.1

These codes carry an Excludes1 note pointing at R79.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R79.1 alone.

D68Other coagulation defects

Risk adjustment

R79.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

R79.1 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56416Billing and Coding: Assays for Vitamins and Metabolic Function
A56758Billing and Coding: Non-Invasive Vascular Studies

How R79.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R79.1.

Abnormal, abnormality, abnormalities›bleeding time
Abnormal, abnormality, abnormalities›partial thromboplastin time(PTT)
Abnormal, abnormality, abnormalities›prothrombin time(PT)
Low›von Willebrand factor
Prolonged, prolongation›bleeding(time) (idiopathic)
Prolonged, prolongation›coagulation(time)
Prolonged, prolongation›partial thromboplastin time(PTT)
Prolonged, prolongation›prothrombin time
Abnormal, abnormality, abnormalities›chemistry, blood›PTT
Abnormal, abnormality, abnormalities›coagulation›profile
Abnormal, abnormality, abnormalities›coagulation›time

Related codes at this level

Codes that share R79. If R79.1 is not quite right, the correct code is usually one of these.

Questions about R79.1

Is R79.1 a billable ICD-10-CM code?: Yes. R79.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R79.1 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on examination of blood, without diagnosis (R70-R79).
What cannot be coded together with R79.1?: R79.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.