2026 ICD-10-CM Diagnosis Code Q82.2Congenital cutaneous mastocytosis
ICD-10-CM Codes›Q00-Q99›Q80-Q89›Q82
- Billable — Valid for Submission
- POA Exempt
- Chronic Condition
Q82.2 is a billable ICD-10-CM diagnosis code for congenital cutaneous mastocytosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. The code is exempt from POA reporting. Coders also document this condition as bullous diffuse cutaneous mastocytosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified congenital anomalies.
Code Identity
Code Classification
Present on Admission (POA)Billing
Q82.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bullous diffuse cutaneous mastocytosis
- Bullous eruption
- Congenital cutaneous mastocytosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Congenital diffuse cutaneous mastocytosis
- Congenital maculopapular cutaneous mastocytosis
- Congenital urticaria pigmentosa
Type 1 Excludes
- cutaneous mastocytosis NOS D47.01
- diffuse cutaneous mastocytosis with onset after newborn period D47.01
- malignant mastocytosis C96.2
- systemic mastocytosis D47.02
- urticaria pigmentosa non-congenital with onset after newborn period D47.01
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Mastocytosis - D47.09
- cutaneous (diffuse) (maculopapular) - D47.01
- congenital - Q82.2
- of neonatal onset - Q82.2
- of newborn onset - Q82.2
- pigmentosa - D47.01
- congenital - Q82.2
- of neonatal onset - Q82.2
- of newborn onset - Q82.2
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Mastocytosis
- cutaneous (diffuse) (maculopapular)
- congenital
- Mastocytosis
- cutaneous (diffuse) (maculopapular)
- of neonatal onset
- Mastocytosis
- cutaneous (diffuse) (maculopapular)
- of newborn onset
- Urticaria
- pigmentosa
- congenital
- Urticaria
- pigmentosa
- of neonatal onset
- Urticaria
- pigmentosa
- of newborn onset
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert Q82.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Q82.2Overview
Is Q82.2 (Other congenital malformations of skin) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report congenital cutaneous mastocytosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does Q82.2 group to?
When congenital cutaneous mastocytosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.
Is Q82.2 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for congenital cutaneous mastocytosis on inpatient claims.
What is the ICD-9 equivalent of Q82.2?
Under the General Equivalence Mappings, congenital cutaneous mastocytosis converts to ICD-9-CM 757.33 (cong skin pigment anomal). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
