2024 ICD-10-CM Diagnosis Code D23.9

Other benign neoplasm of skin, unspecified

Short Description:
Other benign neoplasm of skin, unspecified
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • Neoplasms
    • Benign neoplasms, except benign neuroendocrine tumors
      • Other benign neoplasms of skin

D23.9 is a billable diagnosis code used to specify a medical diagnosis of other benign neoplasm of skin, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic connective tissue NEC skin (dermis) NEC [See Also: Neoplasm, skin, by site] ; Neoplasm, neoplastic nail [See Also: Neoplasm, skin, limb] ; Neoplasm, neoplastic scar NEC [See Also: Neoplasm, skin, by site] ; Neoplasm, neoplastic skin NOS ; Neoplasm, neoplastic skin NOS limb NEC ; Neoplasm, neoplastic skin NOS specified sites NEC ; Neoplasm, neoplastic sudoriferous, sudoriparous gland, site unspecified ; etc

Unspecified diagnosis codes like D23.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Acantholytic dyskeratotic epidermal nevus
  • Acantholytic epidermal nevus
  • Achromic nevus
  • Acquired angiokeratoma
  • Acquired digital fibrokeratoma
  • Acral pseudolymphomatous angiokeratoma of children
  • Acrosyringeal nevus
  • Aneurysmal histiocytoma of skin
  • Angiokeratoma circumscriptum
  • Angiokeratoma of Mibelli
  • Angiokeratoma of skin
  • Apocrine adenoma
  • Apocrine cystadenoma
  • Apocrine nevus
  • Atrophic dermatofibroma
  • Atypical histiocytoma of skin
  • Basal cell nevus with comedones
  • Benign epithelial neoplasm of skin
  • Benign fibrohistiocytic neoplasm of skin
  • Benign fibromatous neoplasm of skin
  • Benign neoplasm of adnexa of skin
  • Benign neoplasm of nail apparatus
  • Benign neoplasm of sebaceous gland
  • Benign neoplasm of skin
  • Benign neoplasm of sweat gland
  • Benign skin tumor with apocrine differentiation
  • Benign skin tumor with eccrine differentiation
  • Benign tumor of dermis
  • Benign tumor of skin with pilar differentiation
  • Benign tumor of skin with sebaceous differentiation
  • Blue nevus of skin
  • Brooke-Spiegler syndrome
  • Cellular blue nevus of skin
  • Cellular histiocytoma of skin
  • Circumscribed storiform collagenoma
  • Clear cell acanthoma
  • Clear cell histiocytoma of skin
  • Clear cell syringoma
  • Collagen nevus of skin
  • Common blue nevus of skin
  • Congenital panfollicular nevus
  • Connective tissue nevus of skin
  • Cutaneous leiomyoma
  • Cutaneous leiomyoma
  • Cutaneous lymphadenoma
  • Cutaneous neurofibroma
  • Cutaneous neuroma
  • Cutaneous papillomatosis
  • Cutaneous papillomatosis
  • Cutaneous storiform neurofibroma
  • Cutaneous T-cell pseudolymphoma
  • Cystic trichoblastoma
  • Dermal nerve sheath myxoma
  • Dermal nerve sheath myxoma, cellular
  • Dermatofibroma
  • Dermatomyofibroma
  • Dermoid cyst of skin
  • Desmoplastic trichilemmoma
  • Desmoplastic trichoepithelioma
  • Eccrine angiomatous hamartoma
  • Eccrine dermal cylindroma
  • Eccrine dermal duct tumor
  • Eccrine epithelioma
  • Eccrine hidradenoma
  • Eccrine hidrocystoma
  • Eccrine mixed tumor
  • Eccrine nevus
  • Eccrine papillary adenoma
  • Eccrine poroma
  • Eccrine spiradenoma
  • Eccrine syringofibroadenoma
  • Elastofibroma of skin
  • Epidermal nevus
  • Epithelioid and spindle cell nevus
  • Eruptive collagenoma of skin
  • Eruptive syringomata
  • Familial cutaneous collagenoma
  • Familial multiple cylindroma
  • Familial multiple discoid fibroma
  • Familial multiple pilomatrixoma
  • Familial multiple syringomata
  • Familial multiple trichoepitheliomata
  • Fat-storing hamartoma of dermal dendrocytes
  • Fibrofolliculoma
  • Fibrous histiocytoma of skin
  • Florid cutaneous papillomatosis
  • Ganglioneuroma
  • Ganglioneuroma of skin
  • Generalized eruptive histiocytoma
  • Giant solitary trichoepithelioma
  • Granular cell histiocytoma of skin
  • Halo nevus
  • Hamartoma of apocrine sweat gland apparatus
  • Hamartoma of apocrine sweat gland apparatus
  • Hamartoma of eccrine sweat gland apparatus
  • Hamartoma of eccrine sweat gland apparatus
  • Hamartoma of eccrine sweat gland apparatus
  • Hamartoma of eccrine sweat gland apparatus
  • Hamartoma of pilosebaceous apparatus
  • Hamartoma of pilosebaceous apparatus
  • Hamartoma of skin
  • Hamartoma of skin appendage
  • Hereditary leiomyomatosis and renal cell carcinoma
  • Hidradenoma
  • Hidroacanthoma simplex
  • Inflammatory epidermal nevus
  • Intraepidermal epithelioma of Jadassohn
  • Keloidal histiocytoma of skin
  • Lichenoid epidermal nevus
  • Linear sebaceous nevus sequence
  • Lipomatous hamartoma
  • Lipomatous hamartoma
  • Mantleoma
  • Moniliform hamartoma
  • Multiple agminated spitz nevi
  • Multiple dysplastic nevi
  • Multiple fibrofolliculomas
  • Multiple self-healing epithelioma of Ferguson-Smith
  • Multiple stucco keratoses
  • Myopericytoma
  • Myopericytoma of skin
  • Neonatal adnexal polyp
  • Neuromuscular hamartoma
  • Nevus anelasticus
  • Nevus elasticus
  • Nevus lipomatosus cutaneous superficialis
  • Onychocytic matricoma
  • Onychomatricoma
  • Osteoma cutis
  • Palisaded encapsulated neuroma
  • Palisaded histiocytoma of skin
  • Papillary hidradenoma
  • Papilloma of skin
  • Perifollicular fibroma
  • Pigmented histiocytoma of skin
  • Pilar sheath acanthoma
  • Pilomatrixoma
  • Pleomorphic fibroma
  • Porokeratotic eccrine ostial and dermal duct nevus
  • Schwannoma of skin
  • Sclerosing angioma of skin
  • Sebaceoma
  • Sebaceous adenoma of skin
  • Sebaceous epithelioma
  • Sebaceous nevus
  • Sebaceous trichofolliculoma
  • Shagreen patch
  • Solitary cutaneous leiomyoma
  • Solitary papular angiokeratoma
  • Spitz nevus with intraepidermal pagetoid spread
  • Squamous cell papilloma of skin
  • Storiform collagenoma
  • Stucco keratosis
  • Syringocystadenoma
  • Syringocystadenoma papilliferum
  • Syringoma
  • Trichilemmoma
  • Trichoadenoma
  • Trichoblastoma
  • Trichodiscoma
  • Trichoepithelioma
  • Trichofolliculoma
  • Trichogerminoma
  • Tumor of follicular infundibulum
  • Vascular hamartoma of skin
  • Vascular hamartomas
  • Verruciform xanthoma of skin
  • Winer's dilated pore

Clinical Information

  • Myopericytoma-. rare myofibroma-like perivascular soft tissue tumor, usually benign, characterized by concentric perivascular proliferation.
  • Ganglioneuroma-. a benign neoplasm that usually arises from the sympathetic trunk in the mediastinum. histologic features include spindle cell proliferation (resembling a neurofibroma) and the presence of large ganglion cells. the tumor may present clinically with horner syndrome or diarrhea due to ectopic production of vasoactive intestinal peptide. (from devita et al., cancer: principles and practice of oncology, 5th ed, p966)
  • Pilomatrixoma-. a tumor composed of cells resembling those of the hair matrix, which undergo 'mummification' and may calcify. it is a relatively uncommon tumor, which may occur at any age from infancy. the majority of patients are under 20, and females are affected more than males. the lesion is usually a solitary deep dermal or subcutaneous tumor 3-30 mm in diameter, situated in the head, neck, or upper extremity. (from rook et al., textbook of dermatology, 4th ed, p2401)
  • Adenoma, Pleomorphic-. a benign, slow-growing tumor, most commonly of the salivary gland, occurring as a small, painless, firm nodule, usually of the parotid gland, but also found in any major or accessory salivary gland anywhere in the oral cavity. it is most often seen in women in the fifth decade. histologically, the tumor presents a variety of cells: cuboidal, columnar, and squamous cells, showing all forms of epithelial growth. (dorland, 27th ed)
  • Syringoma-. a benign tumor of the sweat glands which is usually multiple and results from malformation of sweat ducts. it is uncommon and more common in females than in males. it is most likely to appear at adolescence, and further lesions may develop during adult life. it does not appear to be hereditary. (rook et al., textbook of dermatology, 4th ed, pp2407-8)
  • Horner Syndrome-. a syndrome associated with defective sympathetic innervation to one side of the face, including the eye. clinical features include miosis; mild blepharoptosis; and hemifacial anhidrosis (decreased sweating)(see hypohidrosis). lesions of the brain stem; cervical spinal cord; first thoracic nerve root; apex of the lung; carotid artery; cavernous sinus; and apex of the orbit may cause this condition. (from miller et al., clinical neuro-ophthalmology, 4th ed, pp500-11)
  • Becker Nevus|Becker's Nevus|Linear Papular Ectodermal-Mesodermal Hamartoma|Melanosis Neviformis|Pigmented Hairy Epidermal Nevus|Pigmented Hairy Nevus of Becker|Progressive Cribriform and Zosteriform Hyperpigmentation-. a benign lesion that is sometimes congenital and consists of an overgrowth of the epidermis and the presence of melanin-containing cells. it is found mostly in males and typically develops during childhood or adolescence, becoming darker and more hairy after puberty.
  • Epidermal Nevus-. a benign, pigmented skin growth caused by an overgrowth of the epidermis. it is typically seen at birth, but can develop in early childhood or later in life. most cases are sporadic, but familial patterns of inheritance have been observed.
  • Junctional Nevus|Intraepidermal Nevus|Intraepidermal Nevus of Skin|Intraepidermal Nevus of the Skin|Intraepidermal nevus|Junction Nevus|Junction nevus|Junctional Melanocytic Nevus|Junctional Melanocytoma|Junctional Nevus of Skin|Junctional Nevus of the Skin|Junctional Skin Nevus|Junctional nevus, NOS|junctional nevus-. a nevus characterized by the presence of an intraepidermal proliferation of nevus cells. the nevus cells form multiple nests in the dermal-epidermal junction. it presents as a small, slightly raised, pigmented skin lesion.
  • Verrucous Nevus|Verrucous Epidermal Nevus-. a benign wart-like, pigmented skin lesion appearing on various parts of the body at birth or early in childhood, usually in linear groupings.
  • Trichoadenoma-. a rare benign tumor of the hair follicle occurring usually in the face or buttocks.
  • Basal Cell Nevus with Comedones-. a type of pilosebaceous hamartoma characterized by basal cell epitheliomata, epidermoid cysts and comedones, and epidermal atrophy.
  • Trichofolliculoma-. a skin appendage neoplasm with follicular differentiation. it usually occurs in the head and neck region, particularly the face. it presents as a solitary dome-shaped small lesion. the clinical course is benign.
  • Lipomatosis of Nerve|Fibrolipomatous Hamartoma of Peripheral Nerve|Neural Fibrolipoma|Peripheral Nerve Fibrolipomatous Hamartoma-. a tumor composed of mature adipocytes and fibrous tissue infiltrating the epineurium and peripheral nerves. it is often seen at birth or during childhood and may be associated with macrodactyly.
  • Lipomatous Hamartoma-. a benign hamartomatous lesion composed predominantly of adipose tissue.
  • Thymolipoma|Thymolipomatous Hamartoma-. a well-circumscribed tumor of the thymus composed of islands of normal thymic parenchyma and mature adipose tissue. it is not clear if thymolipoma is a neoplastic or non-neoplastic lesion.
  • Osteoma Cutis-. heterotopic ossification of the skin not associated with a preexisting lesion or process, such as inflammation or neoplasia.
  • Progressive Heterotopic Heteroplasia|Osteoma Cutis|Progressive Osseous Heteroplasia-. loss of function mutation(s) in the paternal allele of the gnas gene, encoding guanine nucleotide-binding protein g(s) subunit alpha isoforms short resulting in dermal ossification beginning in infancy, followed by increasing and extensive heterotopic bone formation in deep muscle and fascia.
  • Pleomorphic Fibroma-. a benign, often polypoid, fibroblastic neoplasm characterized by bizarre pleomorphic cells. (who 2018)

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert to ICD-9-CM Code

Source ICD-10-CM CodeTarget ICD-9-CM Code
D23.9216.9 - Benign neoplasm skin NOS
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.

Table of Neoplasms

This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Neoplasm, neoplastic Malignant
CaInSitu Benign Uncertain
»Neoplasm, neoplastic
  »connective tissue NEC
    »skin (dermis) NEC [See Also: Neoplasm, skin, by site]
»Neoplasm, neoplastic
  »nail [See Also: Neoplasm, skin, limb]
»Neoplasm, neoplastic
  »scar NEC [See Also: Neoplasm, skin, by site]
»Neoplasm, neoplastic
  »skin NOS
»Neoplasm, neoplastic
  »skin NOS
    »limb NEC
»Neoplasm, neoplastic
  »skin NOS
    »specified sites NEC
»Neoplasm, neoplastic
  »sudoriferous, sudoriparous gland, site unspecified
»Neoplasm, neoplastic
  »sweat gland (apocrine) (eccrine), site unspecified

Patient Education

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

Tumors are made up of extra cells. Normally, cells grow and divide to form new cells as your body needs them. When cells grow old, they die, and new cells take their place. Sometimes, this process goes wrong. New cells form when your body does not need them, and old cells do not die when they should. These extra cells can divide without stopping and may form tumor.

Treatment often involves surgery. Benign tumors usually don't grow back.

NIH: National Cancer Institute

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.