N18.9 - Chronic kidney disease, unspecified

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Acquired hypophosphatemia
• Acute-on-chronic renal failure
• Anemia in chronic kidney disease
• Anemia of chronic renal failure
• Anemia of renal disease
• Anemia secondary to renal failure
• Anemia, pre-end stage renal disease on erythropoietin protocol
• Arteriolar nephrosclerosis
• Benign arteriolar nephrosclerosis
• Benign hypertensive heart AND renal disease
• Benign hypertensive heart disease
• Benign hypertensive heart disease
• Benign hypertensive heart disease and chronic renal disease
• Benign hypertensive renal disease
• Cardiorenal syndrome
• Cardiovascular renal disease
• Chronic hypertensive uremia
• Chronic kidney disease
• Chronic kidney disease due to and following excision of neoplasm of kidney
• Chronic kidney disease due to benign hypertension
• Chronic kidney disease due to hypertension
• Chronic kidney disease due to systemic infection
• Chronic kidney disease due to traumatic loss of kidney
• Chronic kidney disease due to type 1 diabetes mellitus
• Chronic kidney disease due to type 1 diabetes mellitus
• Chronic kidney disease due to type 2 diabetes mellitus
• Chronic kidney disease following donor nephrectomy
• Chronic kidney disease mineral and bone disorder
• Chronic kidney disease with osteoporosis
• Chronic renal insufficiency
• Deficiency of alkaline phosphatase
• Disorder of vitamin D
• Drug resistance
• Erythropoietin resistance in anemia of chronic kidney disease
• Hypercalcemia due to chronic kidney disease
• Hyperphosphatemia
• Hyperphosphatemia due to chronic kidney disease
• Hypertension complicating pregnancy, childbirth and the puerperium
• Hypertension in chronic kidney disease due to type 1 diabetes mellitus
• Hypertension in chronic kidney disease due to type 2 diabetes mellitus
• Hypertension secondary to renal disease complicating AND/OR reason for care during puerperium
• Hypertension secondary to renal disease in obstetric context
• Hypertensive heart and chronic kidney disease
• Hypertensive heart and chronic kidney disease
• Hypertensive heart and chronic kidney disease
• Hypertensive heart AND chronic kidney disease on dialysis
• Hypertensive heart AND chronic kidney disease with congestive heart failure
• Hypertensive heart AND renal disease
• Hypertensive heart AND renal disease complicating AND/OR reason for care during childbirth
• Hypertensive heart AND renal disease complicating AND/OR reason for care during pregnancy
• Hypertensive heart AND renal disease in obstetric context
• Hypertensive heart AND renal disease in obstetric context
• Hypertensive heart AND renal disease in obstetric context
• Hypertensive heart and renal disease with heart failure
• Hypertensive heart and renal disease with heart failure
• Hypertensive heart disease complicating AND/OR reason for care during childbirth
• Hypertensive heart disease in obstetric context
• Hypertensive heart disease in obstetric context
• Hypertensive heart disease in obstetric context
• Hypertensive nephrosclerosis
• Hypertensive renal disease
• Hypertensive renal disease complicating AND/OR reason for care during childbirth
• Hypertensive renal disease complicating AND/OR reason for care during pregnancy
• Hypertensive renal disease in obstetric context
• Hypertensive renal disease in obstetric context
• Hypocalcemia due to chronic kidney disease
• Hypophosphatemia due to chronic kidney disease
• Light chain nephropathy
• Low alkaline phosphatase due to chronic kidney disease
• Malignant arteriolar nephrosclerosis
• Malignant hypertensive heart AND renal disease
• Malignant hypertensive heart disease
• Nephrosclerosis
• Neuropathy in renal failure
• Parenchymal renal hypertension
• Pericarditis secondary to uremia
• Polyneuropathy due to drug
• Pre-existing hypertensive chronic kidney disease in mother complicating pregnancy
• Pre-existing hypertensive heart and chronic kidney disease in mother complicating childbirth
• Pre-existing hypertensive heart and chronic kidney disease in mother complicating pregnancy
• Pre-existing hypertensive heart and renal disease complicating pregnancy, childbirth and the puerperium
• Pre-existing hypertensive heart disease in mother complicating pregnancy
• Recurrent post-transplant renal disease
• Renal failure-associated hyperphosphatemia
• Renal hypertension
• Renal hypertension complicating pregnancy, childbirth and the puerperium
• Renal hypertension complicating pregnancy, childbirth and the puerperium - delivered with postnatal complication
• Renal insufficiency
• Renal involvement in malignant disease
• Sclerosing glomerulonephritis
• Soft tissue calcification due to chronic kidney disease
• Toxic polyneuropathy
• Uremic neuropathy
• Uremic polyneuropathy
• Vitamin D deficiency
• Vitamin D deficiency due to chronic kidney disease

Clinical Information

• Hyperphosphatemia-. a condition of abnormally high level of phosphates in the blood, usually significantly above the normal range of 0.84-1.58 mmol per liter of serum.
• Drug Resistance-. diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. it should be differentiated from drug tolerance which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration.
• Drug Resistance, Bacterial-. the ability of bacteria to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. this resistance may be acquired through gene mutation or foreign dna in transmissible plasmids (r factors).
• Drug Resistance, Fungal-. the ability of fungi to resist or to become tolerant to chemotherapeutic agents, antifungal agents, or antibiotics. this resistance may be acquired through gene mutation.
• Drug Resistance, Microbial-. the ability of microorganisms, especially bacteria, to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. this resistance may be acquired through gene mutation or foreign dna in transmissible plasmids (r factors).
• Drug Resistance, Multiple-. simultaneous resistance to several structurally and functionally distinct drugs.
• Drug Resistance, Multiple, Bacterial-. the ability of bacteria to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. this resistance may be acquired through gene mutation or foreign dna in transmissible plasmids (r factors).
• Drug Resistance, Multiple, Fungal-. the ability of fungi to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. this resistance phenotype may be attributed to multiple gene mutations.
• Drug Resistance, Multiple, Viral-. the ability of viruses to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. this resistance phenotype may be attributed to multiple gene mutation.
• Drug Resistance, Neoplasm-. resistance or diminished response of a neoplasm to an antineoplastic agent in humans, animals, or cell or tissue cultures.
• Drug Resistance, Viral-. the ability of viruses to resist or to become tolerant to chemotherapeutic agents or antiviral agents. this resistance is acquired through gene mutation.
• Nephrosclerosis-. hardening of the kidney due to infiltration by fibrous connective tissue (fibrosis), usually caused by renovascular diseases or chronic hypertension. nephrosclerosis leads to renal ischemia.
• Vitamin D Deficiency-. a nutritional condition produced by a deficiency of vitamin d in the diet, insufficient production of vitamin d in the skin, inadequate absorption of vitamin d from the diet, or abnormal conversion of vitamin d to its bioactive metabolites. it is manifested clinically as rickets in children and osteomalacia in adults. (from cecil textbook of medicine, 19th ed, p1406)
• Acute Kidney Injury-. abrupt reduction in kidney function. acute kidney injury encompasses the entire spectrum of the syndrome including acute kidney failure; acute kidney tubular necrosis; and other less severe conditions.
• Renal Insufficiency-. conditions in which the kidneys perform below the normal level in the ability to remove wastes, concentrate urine, and maintain electrolyte balance; blood pressure; and calcium metabolism. renal insufficiency can be classified by the degree of kidney damage (as measured by the level of proteinuria) and reduction in glomerular filtration rate.
• Phosphates-. inorganic salts of phosphoric acid.
• Drug Tolerance-. progressive diminution of the susceptibility of a human or animal to the effects of a drug, resulting from its continued administration. it should be differentiated from drug resistance wherein an organism, disease, or tissue fails to respond to the intended effectiveness of a chemical or drug. it should also be differentiated from maximum tolerated dose and no-observed-adverse-effect level.
• Chronic Kidney Disease due to Hypertension-. longstanding kidney disease as a complication of hypertension.
• Uremic Neuropathy-. neuropathy resulting from uremia.
• Grade 1 Hyperphosphatemia, CTCAE|Grade 1 Hyperphosphatemia-. laboratory finding only and intervention not indicated
• Grade 2 Hyperphosphatemia, CTCAE|Grade 2 Hyperphosphatemia-. noninvasive intervention indicated
• Grade 3 Hyperphosphatemia, CTCAE|Grade 3 Hyperphosphatemia-. severe or medically significant but not immediately life-threatening; hospitalization or prolongation of existing hospitalization indicated
• Grade 4 Hyperphosphatemia, CTCAE|Grade 4 Hyperphosphatemia-. life-threatening consequences; urgent intervention indicated (e.g., dialysis)
• Grade 5 Hyperphosphatemia, CTCAE|Grade 5 Hyperphosphatemia-. death
• Hyperphosphatemia-. abnormally high level of phosphate in the blood.
• Hyperphosphatemia, CTCAE|Hyperphosphatemia-. a disorder characterized by laboratory test results that indicate an elevation in the concentration of phosphate in a blood.
• Renal Hypertension-. hypertension caused by narrowing or occlusion of the renal arteries.
• Nutritional Vitamin D Deficiency Rickets-. nutritional rickets due to dietary deficiency of vitamin d.
• Vitamin D Deficiency-. abnormally low level of 25-hydroxyvitamin d in the blood.
• Cardiorenal Syndrome-. a disorder of the heart and kidneys in which dysfunction of one of the organs induces dysfunction of the other organ.
• Toxic Polyneuropathy-. polyneuropathy that is caused by exposure to toxins.

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Patient Education

Chronic Kidney Disease

You have two kidneys, each about the size of your fist. Their main job is to filter your blood. They remove wastes and extra water, which become urine. They also keep the body's chemicals balanced, help control blood pressure, and make hormones.

Chronic kidney disease (CKD) means that your kidneys are damaged and can't filter blood as they should. This damage can cause wastes to build up in your body. It can also cause other problems that can harm your health. Diabetes and high blood pressure are the most common causes of CKD.

The kidney damage occurs slowly over many years. Many people don't have any symptoms until their kidney disease is very advanced. Blood and urine tests are the only way to know if you have kidney disease.

Treatments cannot cure kidney disease, but they may slow kidney disease. They include medicines to lower blood pressure, control blood sugar, and lower cholesterol. CKD may still get worse over time. Sometimes it can lead to kidney failure. If your kidneys fail, you will need dialysis or a kidney transplantation.

You can take steps to keep your kidneys healthier longer:

• Choose foods with less salt (sodium)
• Control your blood pressure; your health care provider can tell you what your blood pressure should be
• Keep your blood sugar in the target range, if you have diabetes
• Limit the amount of alcohol you drink
• Choose foods that are healthy for your heart: fruits, vegetables, whole grains, and low-fat dairy foods
• Lose weight if you are overweight
• Be physically active
• Don't smoke

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Diet & Nutrition for Adults with Advanced Chronic Kidney Disease

Mineral & Bone Disorder in Chronic Kidney Disease

Code History

• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)