2024 ICD-10-CM Diagnosis Code D36.9

Benign neoplasm, unspecified site

ICD-10-CM Code:
ICD-10 Code for:
Benign neoplasm, unspecified site
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Neoplasms
    • Benign neoplasms, except benign neuroendocrine tumors
      • Benign neoplasm of other and unspecified sites

D36.9 is a billable diagnosis code used to specify a medical diagnosis of benign neoplasm, unspecified site. 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 unknown site or unspecified .

Unspecified diagnosis codes like D36.9 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:

  • Adenoma
  • Angiofibroma
  • Benign adenomatous neoplasm
  • Benign fibrohistiocytic neoplasm
  • Benign glands at surgical margin
  • Benign inverted papilloma
  • Benign mesenchymal neoplasm of uncertain differentiation
  • Benign neoplastic disease
  • Benign tumor of unknown origin
  • Dermoid cyst
  • Dermoid cyst of face
  • Dermoid cyst of skin
  • External angular dermoid
  • Growing teratoma syndrome
  • Hamartoma of integument
  • Lipomatous hamartoma
  • Myelopathy due to benign neoplastic disease
  • Myelopathy due to neoplastic disease
  • Papilloma
  • Pericarditis secondary to benign primary tumor
  • Pericarditis secondary to neoplasia
  • Pigmented neuroectodermal tumor of infancy
  • Surgical lateral margin involved by adenoma
  • Surgical mucosal margin involved by adenoma
  • Surgical proximal margin involved by adenoma
  • Surgical proximal margin involved by adenoma with high-grade dysplasia
  • Surgical proximal margin involved by adenoma with low-grade dysplasia
  • Surgical proximal margin uninvolved by adenoma
  • Tubular adenoma
  • Tumor of unknown origin

Clinical Classification

Clinical Information

  • ACTH-Secreting Pituitary Adenoma

    a pituitary adenoma which secretes adrenocorticotropin, leading to cushing disease.
  • Adenocarcinoma

    a malignant epithelial tumor with a glandular organization.
  • Adenoma

    a benign epithelial tumor with a glandular organization.
  • Adenoma, Acidophil

    a benign tumor, usually found in the anterior lobe of the pituitary gland, whose cells stain with acid dyes. such pituitary tumors may give rise to excessive secretion of growth hormone, resulting in gigantism or acromegaly. a specific type of acidophil adenoma may give rise to nonpuerperal galactorrhea. (dorland, 27th ed)
  • Adenoma, Basophil

    a small tumor of the anterior lobe of the pituitary gland whose cells stain with basic dyes. it may give rise to excessive secretion of acth, resulting in cushing syndrome. (dorland, 27th ed)
  • Adenoma, Bile Duct

    a benign tumor of the intrahepatic bile ducts.
  • Adenoma, Chromophobe

    a benign tumor of the anterior pituitary in which the cells do not stain with acidic or basic dyes.
  • Adenoma, Islet Cell

    a benign tumor of the pancreatic islet cells. usually it involves the insulin-producing pancreatic beta cells, as in insulinoma, resulting in hyperinsulinism.
  • Adenoma, Liver Cell

    a benign epithelial tumor of the liver.
  • Adenoma, Oxyphilic

    a usually benign glandular tumor composed of oxyphil cells, large cells with small irregular nuclei and dense acidophilic granules due to the presence of abundant mitochondria. oxyphil cells, also known as oncocytes, are found in oncocytomas of the kidney, salivary glands, and endocrine glands. in the thyroid gland, oxyphil cells are known as hurthle cells and askanazy cells.
  • 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)
  • Adenoma, Sweat Gland

    a benign neoplasm derived from epithelial cells of sweat glands. (stedman, 25th ed)
  • Adenoma, Villous

    an adenoma of the large intestine. it is usually a solitary, sessile, often large, tumor of colonic mucosa composed of mucinous epithelium covering delicate vascular projections. hypersecretion and malignant changes occur frequently. (stedman, 25th ed)
  • Adenomatoid Tumor

    a small, circumscribed, benign tumor of the genital tract, composed of small glandlike spaces lined by flattened or cuboidal mesothelium-like cells. (from dorland, 27th ed)
  • Adenomatosis, Pulmonary

    a neoplastic disease in which the alveoli and distal bronchi are filled with mucus and mucus-secreting columnar epithelial cells. it is characterized by abundant, extremely tenacious sputum, chills, fever, cough, dyspnea, and pleuritic pain. (stedman, 25th ed)
  • Adenomatous Polyposis Coli

    a polyposis syndrome due to an autosomal dominant mutation of the apc genes (genes, apc) on chromosome 5. the syndrome is characterized by the development of hundreds of adenomatous polyps in the colon and rectum of affected individuals by early adulthood.
  • Adenomatous Polyposis Coli Protein

    a negative regulator of beta-catenin signaling which is mutant in adenomatous polyposis coli and gardner syndrome.
  • Adenomatous Polyps

    benign neoplasms derived from glandular epithelium. (from stedman, 25th ed)
  • Adrenocortical Adenoma

    a benign neoplasm of the adrenal cortex. it is characterized by a well-defined nodular lesion, usually less than 2.5 cm. most adrenocortical adenomas are nonfunctional. the functional ones are yellow and contain lipids. depending on the cell type or cortical zone involved, they may produce aldosterone; hydrocortisone; dehydroepiandrosterone; and/or androstenedione.
  • Epithelial Cells

    cells that line the inner and outer surfaces of the body by forming cellular layers (epithelium) or masses. epithelial cells lining the skin; the mouth; the nose; and the anal canal derive from ectoderm; those lining the respiratory system and the digestive system derive from endoderm; others (cardiovascular system and lymphatic system) derive from mesoderm. epithelial cells can be classified mainly by cell shape and function into squamous, glandular and transitional epithelial cells.
  • Glucagonoma

    an almost always malignant glucagon-secreting tumor derived from the pancreatic alpha cells. it is characterized by a distinctive migratory erythema; weight loss; stomatitis; glossitis; diabetes mellitus; hypoaminoacidemia; and normochromic normocytic anemia.
  • Growth Hormone-Secreting Pituitary Adenoma

    a pituitary tumor that secretes growth hormone. in humans, excess human growth hormone leads to acromegaly.
  • Insulinoma

    a benign tumor of the pancreatic beta cells. insulinoma secretes excess insulin resulting in hypoglycemia.
  • Multiple Endocrine Neoplasia

    a group of autosomal dominant diseases characterized by the combined occurrence of tumors involving two or more endocrine glands that secrete peptide hormones or amines. these neoplasias are often benign but can be malignant. they are classified by the endocrine glands involved and the degree of aggressiveness. the two major forms are men1 and men2 with gene mutations on chromosome 11 and chromosome 10, respectively.
  • Parathyroid Neoplasms

    tumors or cancer of the parathyroid glands.
  • Pituitary Neoplasms

    neoplasms which arise from or metastasize to the pituitary gland. the majority of pituitary neoplasms are adenomas, which are divided into non-secreting and secreting forms. hormone producing forms are further classified by the type of hormone they secrete. pituitary adenomas may also be characterized by their staining properties (see adenoma, basophil; adenoma, acidophil; and adenoma, chromophobe). pituitary tumors may compress adjacent structures, including the hypothalamus, several cranial nerves, and the optic chiasm. chiasmal compression may result in bitemporal hemianopsia.
  • Pneumonia, Atypical Interstitial, of Cattle

    a cattle disease of uncertain cause, probably an allergic reaction.
  • Prolactinoma

    a pituitary adenoma which secretes prolactin, leading to hyperprolactinemia. clinical manifestations include amenorrhea; galactorrhea; impotence; headache; visual disturbances; and cerebrospinal fluid rhinorrhea.
  • Prostatic Hyperplasia

    increase in constituent cells in the prostate, leading to enlargement of the organ (hypertrophy) and adverse impact on the lower urinary tract function. this can be caused by increased rate of cell proliferation, reduced rate of cell death, or both.
  • Pulmonary Adenomatosis, Ovine

    a contagious, neoplastic, pulmonary disease of sheep characterized by hyperplasia and hypertrophy of pneumocytes and epithelial cells of the lung. it is caused by jaagsiekte sheep retrovirus.
  • Thyroid Neoplasms

    tumors or cancer of the thyroid gland.
  • Tuberous Sclerosis

    autosomal dominant neurocutaneous syndrome classically characterized by mental retardation; epilepsy; and skin lesions (e.g., adenoma sebaceum and hypomelanotic macules). there is, however, considerable heterogeneity in the neurologic manifestations. it is also associated with cortical tuber and hamartomas formation throughout the body, especially the heart, kidneys, and eyes. mutations in two loci tsc1 and tsc2 that encode hamartin and tuberin, respectively, are associated with the disease.
  • Angiofibroma

    a benign neoplasm of fibrous tissue in which there are numerous small and large, frequently dilated, vascular channels. (stedman, 25th ed)
  • Dermoid Cyst

    a tumor consisting of displaced ectodermal structures along the lines of embryonic fusion, the wall being formed of epithelium-lined connective tissue, including skin appendages, and containing keratin, sebum, and hair. (stedman, 25th ed)
  • Bovine papillomavirus 1

    a species of deltapapillomavirus infecting cattle.
  • Cottontail rabbit papillomavirus

    the type species of kappapapillomavirus. it is reported to occur naturally in cottontail rabbits in north america.
  • Digital Dermatitis

    highly contagious infectious dermatitis with lesions near the interdigital spaces usually in cattle. it causes discomfort and often severe lameness (lameness, animal). lesions can be either erosive or proliferative and wart-like with papillary growths and hypertrophied hairs. dichelobacter nodosus and treponema are the most commonly associated causative agents for this mixed bacterial infection disease.
  • DNA Probes, HPV

    dna probes specific for the identification of human papilloma virus.
  • Human Papillomavirus Viruses

    a large group of viruses that cause human papillomavirus infection, e.g., genital warts and cancer of the cervix; vagina; vulva; anus; or oropharynx. most common clinically important human papilloma viruses are taxonomically members of alphapapillomavirus and gammapapillomavirus.
  • Lambdapapillomavirus

    a genus of dna viruses in the family papillomaviridae, causing mucosal and cutaneous lesions in cats and dogs. canine oral papillomavirus is the type species.
  • Papilloma

    a circumscribed benign epithelial tumor projecting from the surrounding surface; more precisely, a benign epithelial neoplasm consisting of villous or arborescent outgrowths of fibrovascular stroma covered by neoplastic cells. (stedman, 25th ed)
  • Papilloma, Choroid Plexus

    a usually benign neoplasm that arises from the cuboidal epithelium of the choroid plexus and takes the form of an enlarged choroid plexus, which may be associated with oversecretion of csf. the tumor usually presents in the first decade of life with signs of increased intracranial pressure including headaches; ataxia; diplopia; and alterations of mental status. in children it is most common in the lateral ventricles and in adults it tends to arise in the fourth ventricle. malignant transformation to choroid plexus carcinomas may rarely occur. (adams et al., principles of neurology, 6th ed, p667; devita et al., cancer: principles and practice of oncology, 5th ed, p2072)
  • Papilloma, Intraductal

    a small, often impalpable benign papilloma arising in a lactiferous duct and frequently causing bleeding from the nipple. (stedman, 25th ed)
  • Papilloma, Inverted

    a mucosal tumor of the urinary bladder or nasal cavity in which proliferating epithelium is invaginated beneath the surface and is more smoothly rounded than in other papillomas. (stedman, 25th ed)
  • Papillomaviridae

    a family of small, non-enveloped dna viruses infecting birds and most mammals, especially humans. they are grouped into multiple genera, but the viruses are highly host-species specific and tissue-restricted. they are commonly divided into hundreds of papillomavirus "types", each with specific gene function and gene control regions, despite sequence homology. human papillomaviruses are found in the genera alphapapillomavirus; betapapillomavirus; gammapapillomavirus; and mupapillomavirus.
  • Papillomavirus E7 Proteins

    oncogene proteins from papillomavirus that deregulate the cell cycle of infected cells and lead to neoplastic cell transformation. papillomavirus e7 proteins have been shown to interact with various regulators of the cell cycle including retinoblastoma protein and certain cyclin-dependent kinase inhibitors.
  • Papillomavirus Infections

    neoplasms of the skin and mucous membranes caused by papillomaviruses. they are usually benign but some have a high risk for malignant progression.
  • Papillomavirus Vaccines

    vaccines or candidate vaccines used to prevent papillomavirus infections. human vaccines are intended to reduce the incidence of uterine cervical neoplasms, so they are sometimes considered a type of cancer vaccines. they are often composed of capsid proteins, especially l1 protein, from various types of alphapapillomavirus.
  • Tumor Virus Infections

    infections produced by oncogenic viruses. the infections caused by dna viruses are less numerous but more diverse than those caused by the rna oncogenic viruses.
  • Liver

    a large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.
  • Mitochondria

    semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. each mitochondrion is surrounded by a double limiting membrane. the inner membrane is highly invaginated, and its projections are called cristae. mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of atp. they contain distinctive ribosomes, transfer rnas (rna, transfer); amino acyl t rna synthetases; and elongation and termination factors. mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger rnas (rna, messenger). mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (king & stansfield, a dictionary of genetics, 4th ed)
  • Parathyroid Glands

    two pairs of small oval-shaped glands located in the front and the base of the neck and adjacent to the two lobes of thyroid gland. they secrete parathyroid hormone that regulates the balance of calcium; phosphorus; and magnesium in the body.
  • Prostate

    a gland in males that surrounds the neck of the urinary bladder and the urethra. it secretes a substance that liquefies coagulated semen. it is situated in the pelvic cavity behind the lower part of the pubic symphysis, above the deep layer of the triangular ligament, and rests upon the rectum.
  • Jaagsiekte sheep retrovirus

    a betaretrovirus that causes pulmonary adenomatosis in sheep (pulmonary adenomatosis, ovine).
  • Thyroid Gland

    a highly vascularized endocrine gland consisting of two lobes joined by a thin band of tissue with one lobe on each side of the trachea. it secretes thyroid hormones from the follicular cells and calcitonin from the parafollicular cells thereby regulating metabolism and calcium level in blood, respectively.
  • Deltapapillomavirus

    a genus of dna viruses in the family papillomaviridae causing fibropapillomas in their respective ungulate hosts. species infected include cattle, european elk, deer, and sheep.
  • Kappapapillomavirus

    a genus of dna viruses in the family papillomaviridae, causing cutaneous and mucosal lesions in rabbits. cottontail rabbit papillomavirus is the type species.
  • DNA

    a deoxyribonucleotide polymer that is the primary genetic material of all cells. eukaryotic and prokaryotic organisms normally contain dna in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. dna, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
  • 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.

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 D36.9 to ICD-9-CM

  • ICD-9-CM Code: 229.9 - Benign neoplasm 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
  »unknown site or 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.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.