2027 ICD-10-CM Diagnosis Code N28.1Cyst of kidney, acquired
ICD-10-CM Codes›N00–N99›N25-N29›N28
- Billable — Valid for Submission
- Not Chronic
N28.1 is a billable ICD-10-CM diagnosis code for cyst of kidney, acquired. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of kidney and ureters.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired complex renal cyst
- Acquired cystic disease associated renal cell carcinoma
- Acquired cystic disease of transplanted kidney
- Acquired polycystic kidney disease
- Acquired renal cyst with neoplastic change
- Acquired renal cyst without neoplastic change
- Acquired renal cystic disease
- Complex renal cyst
- Cyst of kidney
- Hydatid cyst of kidney
- Infected renal cyst
- Multiple acquired kidney cysts
- Multiple renal cysts
- Parapelvic renal cyst
- Peripelvic cyst
- Rupture of kidney
- Ruptured cyst of kidney
- Simple renal cyst
- Single acquired kidney cyst
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N28.1: its own notes plus those printed at block N25-N29 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Cyst (multiple) (solitary) of kidney (acquired)
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- cystic kidney disease (congenital) (Q61.-)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Cyst (colloid) (mucous) (simple) (retention)
kidney N28.1
acquired N28.1
simple N28.1
solitary (single) N28.1
acquired N28.1
paranephric N28.1
peripelvic (lymphatic) N28.1
kidney N28.1
cyst, kidney N28.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Kidney Cyst
abnormal fluid filled sac within the kidney, either acquired or congenital.
Patient EducationClinical
Kidney Cysts
A cyst is a fluid-filled sac. You may get simple kidney cysts as you age; they are usually harmless. There are also some diseases which cause kidney cysts. One type is polycystic kidney disease (PKD). It runs in families. In PKD, many cysts grow in the kidneys. This can enlarge the kidneys and make them work poorly.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N28.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N28.1Overview
What is the ICD-10 code for cyst of kidney, acquired?
The ICD-10-CM code for cyst of kidney, acquired is N28.1 (sometimes written as N281). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N28.1 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cyst of kidney, acquired on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N28.1 group to?
When cyst of kidney, acquired is the principal diagnosis on an inpatient stay, it groups to MS-DRG 699, 698, 700, with relative weights from 0.6740 to 1.6400 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N28.1 be reported with a code from Q61?
Not as a rule. The Excludes1 note on N28.1 lists "cystic kidney disease (congenital) (Q61.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of N28.1?
Under the General Equivalence Mappings, cyst of kidney, acquired converts to ICD-9-CM 593.2 (cyst of kidney, acquired). The mapping is a direct match.
