2027 ICD-10-CM Diagnosis Code D23.9Other benign neoplasm of skin, unspecified

ICD-10-CM Codes›C00–D49›D10-D36›D23

ICD-10-CM D23.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D23.9 is a billable ICD-10-CM diagnosis code for other benign neoplasm of skin, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D23.9
Billable Status
Yes — Valid for Submission
Code Describes
Other benign neoplasm of skin, unspecified
Short Description
Other benign neoplasm of skin, unspecified
Same as the full description in the CMS dataset.
Parent Code
D23
Other benign neoplasms of skin

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD23Other benign neoplasms of skin
This CodeD23.9Other benign neoplasm of skin, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this 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 hidrocystoma
  • Apocrine nevus
  • Atrophic dermatofibroma
  • Basal cell nevus with comedones
  • Benign eccrine dermal duct neoplasm of skin
  • Benign epithelial neoplasm of skin
  • Benign fibrohistiocytic neoplasm of skin
  • Benign fibromatous neoplasm of skin
  • Benign neoplasm of adnexa of skin
  • Benign neoplasm of dermis
  • Benign neoplasm of nail apparatus
  • Benign neoplasm of sebaceous gland
  • Benign neoplasm of skin
  • Benign neoplasm of skin with eccrine differentiation
  • Benign neoplasm of skin with pilar differentiation
  • Benign neoplasm of sweat gland
  • Benign skin tumor with apocrine 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 lymphadenoma
  • Cutaneous neurofibroma
  • Cutaneous neuroma
  • Cutaneous papillomatosis
  • Cutaneous storiform neurofibroma
  • 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 epithelioma
  • Eccrine hidradenoma
  • Eccrine hidrocystoma
  • Eccrine mixed tumor
  • Eccrine nevus
  • Eccrine papillary adenoma
  • Eccrine poroma
  • Eccrine spiradenoma
  • Eccrine syringofibroadenoma
  • Elastofibroma
  • 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 eccrine sweat gland 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
  • Large cell acanthoma
  • Lichenoid epidermal nevus
  • Linear sebaceous nevus sequence
  • Lipomatous hamartoma
  • Mantleoma
  • Moniliform hamartoma
  • Multiple agminated spitz nevi
  • Multiple dysplastic nevi
  • Multiple fibrofolliculomas
  • Multiple self-healing epithelioma of Ferguson-Smith
  • Multiple stucco keratoses
  • Multiple trichilemmomas
  • Myofibroma
  • 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
  • Papillomatosis due to lymphedema
  • Perifollicular fibroma
  • Pigmented histiocytoma of skin
  • Pilar sheath acanthoma
  • Pilomatrixoma
  • Pleomorphic adenoma of soft tissue
  • Pleomorphic fibroma
  • Porokeratotic eccrine ostial and dermal duct nevus
  • Schwannoma of skin
  • Sclerosing angioma of skin
  • Sebaceoma
  • Sebaceous adenoma of skin
  • Sebaceous nevus
  • Sebaceous trichofolliculoma
  • Shagreen patch
  • Single trichilemmoma
  • 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D23.9: its own notes plus those printed at D23 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From D23 Other benign neoplasms of skin applies to 20 codes
  • benign neoplasm of hair follicles
  • benign neoplasm of sebaceous glands
  • benign neoplasm of sweat glands

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From D23 Other benign neoplasms of skin applies to 20 codes

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.

From D23 Other benign neoplasms of skin applies to 20 codes

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO073
Benign neoplasms
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
connective tissue NEC › skin (dermis) NEC [See Also: Neoplasm, skin, by site]C44.90C79.2D04.9D23.9D48.5D49.2
nail [See Also: Neoplasm, skin, limb]C44.90C79.2D04.9D23.9D48.5D49.2
scar NEC [See Also: Neoplasm, skin, by site]C44.90C79.2D04.9D23.9D48.5D49.2
skin NOSC44.90C79.2D04.9D23.9D48.5D49.2
skin NOS › limb NECC44.90C79.2D04.9D23.9D48.5D49.2
skin NOS › specified sites NECC44.80C79.2D04.8D23.9D48.5D49.2
sudoriferous, sudoriparous gland, site unspecifiedC44.90C79.2D04.9D23.9D48.5D49.2
sweat gland (apocrine) (eccrine), site unspecifiedC44.90C79.2D04.9D23.9D48.5D49.2

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D23.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
216.9 Benign neoplasm skin NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D23.9Overview

What is the ICD-10 code for other benign neoplasm of skin, unspecified?

The ICD-10-CM code for other benign neoplasm of skin, unspecified is D23.9 (sometimes written as D239). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D23.9 (Other benign neoplasms of skin) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other benign neoplasm of skin, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D23.9 group to?

When other benign neoplasm of skin, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D23.9?

Under the General Equivalence Mappings, other benign neoplasm of skin, unspecified converts to ICD-9-CM 216.9 (benign neoplasm skin NOS). The mapping is approximate, so confirm the match fits the documentation.