Article courtesy of Renal Business Today
By Betty Johnson, CPC, CPC-I, CPC-H, CPCD, CCS-P, PCS, CCP, CIC, RMC
The Health Insurance Portability and Accountability Act (HIPAA) of 1996 included provisions for standardization of healthcare information, which opened the path to ICD-10-CM in the United States. The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) was developed by the U.S. National Center for Health Statistics (NCHS) along with an advisory panel to ensure accuracy and utility in 1993. On January 5, 2009, the U.S. Department of Health and Human Services (DHHS) announced that ICD-9-CM would be replaced by the ICD-10 system (ICD-10-CM and ICD-10-PCS) on October 1, 2013. All HIPAA covered entities must comply with this date. ICD-10-CM codes are all alphanumeric, starting with an alpha character, as opposed to V and E codes in ICD-9-CM. This article will discuss the guidelines and diagnosis codes related to dialysis patients.
According to the National Kidney Foundation, 26 million American adults have CKD. Dialysis is most commonly prescribed in adult patients for temporary or permanent kidney failure. Diabetes and hypertension are responsible for CKD in up to 2/3 of the cases. We will address the ICD-10-CM codes and guidelines for diabetic chronic kidney disease and hypertensive chronic kidney disease.
Diabetes with Diabetic Chronic Kidney Disease
In ICD-10-CM, more than one code is required to diagnose diabetic chronic kidney disease: one combination code that indicates the type of diabetes with chronic kidney disease and one that indicates the stage of CKD. The diabetes codes in ICD-10-CM are found in Chapter 4, Endocrine, Nutritional, and Metabolic Diseases (E00-E89). There are five (5) categories for diabetes codes in ICD-10-CM, compared to one in ICD-9-CM. This is due to the fact that the diabetes mellitus codes in ICD-10-CM are combination codes. The codes include the type of diabetes mellitus, the body system affected, and the complications affecting that body system. There five categories are as follows:
- E08 Diabetes mellitus due to an underlying condition
- E09 Drug or chemical induced diabetes mellitus
- E10 Type 1 diabetes mellitus
- E11 Type 2 diabetes mellitus
- E13 Other specified diabetes mellitus
The following codes indicate CKD in diabetic patients in ICD-10-CM:
- E08.22 Diabetes mellitus due to underlying condition with diabetic chronic kidney disease
- E09.22 Drug or chemic induced diabetes mellitus with diabetic chronic kidney disease
- E10.22 Type I diabetes mellitus with diabetic chronic kidney disease
- E11.22 Type II diabetes mellitus with diabetic chronic kidney disease
- E13.22 Other specified diabetes mellitus with diabetic chronic kidney disease
Only one code from above would be chosen, based on the type of diabetes.
Under each of the codes listed above, there is a note that directs the user to “Use additional code to identify stage of chronic kidney disease.” This indicates that a second code would need to be listed after the diabetes code. This code will be used to specify the stage of CKD of the patient.
The codes for chronic kidney disease are found in Chapter 14, Diseases of the Genitourinary System (N00-N99). ICD-10-CM classifies CKD based on severity. The following codes indicate CKD in ICD-10-CM:
- N18.1 Chronic kidney disease, stage 1
- N18.2 Chronic kidney disease, stage 2 (mild)
Hypertensive Chronic Kidney Disease
In ICD-10-CM, more than one code is required to diagnose hypertensive chronic kidney disease: one combination code that indicates the patient has both hypertension and CKD, and one that indicates the stage of CKD. The hypertension codes are found in Chapter 9, Diseases of Circulatory System (I00-I99).
According to the ICD-10-CM Draft Official Guidelines for Coding and Reporting 2011 (C.9.a.2), assign codes from category I12, Hypertensive chronic kidney disease, when both hypertension and a condition classifiable to category N18, Chronic kidney disease (CKD), are present. Unlike hypertension with heart disease, ICD-10-CM presumes a cause-and-effect relationship and classifies chronic kidney disease with hypertension as hypertensive chronic kidney disease. The appropriate code from category N18 should be used as a secondary code with a code from category I12 to identify the stage of chronic kidney disease. If the patient has hypertensive chronic kidney disease and acute renal failure, an additional code for the acute renal failure is required.
The guidelines also state (C.9.a.3) to assign codes from combination category I13, Hypertensive heart and chronic kidney disease, when both hypertensive kidney disease and hypertensive heart disease are stated in the diagnosis. Assume a relationship between the hypertension and the CKD, whether or not the condition is so designated. If heart failure is present, assign an additional code from category I50 to identify the type of heart failure. The appropriate code from category N18, Chronic kidney disease, should be used as a secondary code with a code from category I13 to identify the stage of chronic kidney disease.
The following codes indicate hypertensive CKD in ICD-10-CM:
- I12.0 Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease
- I12.9 Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.10 Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.11 Hypertensive heart and chronic kidney disease without heart failure, with stage 5 chronic kidney disease, or end stage renal disease
- I13.2 Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease
Just as with diabetic chronic kidney disease, under each of the codes listed above, there is a note that directs the user to “Use additional code to identify stage of chronic kidney disease”. This indicates that a second code would need to be listed after the hypertension code. This code will be used to specify the stage of CKD of the patient. In the case of I13.2, Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease, here is another note that directs the user to “Use additional code to identify type of heart failure (I50-)” also.
Example 1: Patient has malignant hypertension and end stage renal disease. The proper ICD-10-CM codes, in order, for this patient would be:
- I12.0 Hypertensive chronic kidney disease with stage V chronic kidney disease or end stage renal disease
- N18.6 End stage renal disease
Example 2: A patient has acute diastolic heart failure due to hypertension with stage 5 CKD. The proper ICD-10-CM codes for this patient would be:
- I13.2 Hypertensive heart and renal disease with both heart failure and chronic renal failure
- N18.5 Chronic kidney disease, stage 5
- I50.31 Acute diastolic (congestive) heart failure
The ICD-10-CM Draft Official Guidelines for Coding and Reporting 2011 give further instruction on the usage of the combination code category I13. It states that the combination codes in this category include hypertension, heart disease, and chronic kidney disease. The Includes note at I13 specifies that the conditions included at I11 and I12 (hypertension and hypertensive CKD, respectively) are included together in I13. If a patient has hypertension, heart disease and chronic kidney disease then a code from I13 should be sued, not individual codes for hypertension, heart disease, and chronic kidney disease.
Additionally, there is a code in ICD-10-CM for dependence on dialysis – Z99.2. It is for hemodialysis status, peritoneal dialysis status, renal dialysis status NOS, or presence of arteriovenous shunt for dialysis.
The examples and guidelines outlined above should help to gain an understanding of the documentation necessary for ICD-10-CM in regards to dialysis.
If you need assistance starting the conversion process, please contact Nephrology Practice Solutions at 866-434-9029 or PracticeSolutions@davita.com.
Article courtesy of Renal Business Today