L99 - Other disorders of skin and subcutaneous tissue in diseases classified elsewhere
| ICD-10: | L99 |
| Short Description: | Oth disorders of skin, subcu in diseases classd elswhr |
| Long Description: | Other disorders of skin and subcutaneous tissue in diseases classified elsewhere |
| Status: | Valid for Submission |
| Version: | ICD-10-CM 2023 |
| Code Classification: |
L99 is a billable ICD-10 code used to specify a medical diagnosis of other disorders of skin and subcutaneous tissue in diseases classified elsewhere. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute Chagas' disease
- African trypanosomiasis affecting skin
- Amyloidosis cutis dyschromia
- Amyloidosis limited to skin
- Behcet disease of skin
- Chagas' exanthem
- Cutaneous complication of rheumatoid disease
- Cutaneous complication of systemic sclerosis
- Dermatosis resulting from vascular insufficiency
- Disorder of skin co-occurrent with human immunodeficiency virus infection
- Disorder of skin co-occurrent with human immunodeficiency virus infection
- Disorder of skin due to human immunodeficiency virus infection
- Human immunodeficiency virus modified skin disease
- Metabolic and nutritional disorders affecting skin
- Non-specific cutaneous reaction in Hodgkin's disease
- Primary localized cutaneous amyloidosis
- Rheumatoid neutrophilic dermatitis
- Secondary xanthomatous infiltration of the skin
- Skin disorder with AIDS
- Skin involvement in bacterial endocarditis
- Skin lesion in drug addict
- Small vessel thrombosis of skin
- Spinal cord defect affecting skin
- Systemic disease affecting skin
- Trypanosomiasis affecting skin
- Trypanosomiasis affecting skin
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to this diagnosis code:
Code First
Code FirstCertain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- underlying disease, such as:
- amyloidosis E85
Type 1 Excludes
Type 1 ExcludesA 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.
Code Edits
The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:
- Manifestation diagnoses - Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.
Convert to ICD-9 Code
| Source ICD-10 Code | Target ICD-9 Code | |
|---|---|---|
| L99 | 701.8 - Skin hypertro/atroph NEC | |
| Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code. | ||
| L99 | 709.8 - Skin disorders NEC | |
| Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code. | ||
Patient Education
Skin Conditions
Your skin is your body's largest organ. It covers and protects your body. Your skin:
- Holds body fluids in, preventing dehydration
- Keeps harmful microbes out, preventing infections
- Helps you feel things like heat, cold, and pain
- Keeps your body temperature even
- Makes vitamin D when the sun shines on it
Anything that irritates, clogs, or inflames your skin can cause symptoms such as redness, swelling, burning, and itching. Allergies, irritants, your genetic makeup, and certain diseases and immune system problems can cause rashes, hives, and other skin conditions. Many skin problems, such as acne, also affect your appearance.
NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases
[Learn More in MedlinePlus]
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)
