2026 ICD-10-CM Diagnosis Code D16.9Benign neoplasm of bone and articular cartilage, unspecified

ICD-10-CM Codes›C00–D49›D10-D36›D16

ICD-10-CM D16.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D16.9 is a billable ICD-10-CM diagnosis code for benign neoplasm of bone and articular cartilage, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D16.9
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of bone and articular cartilage, unspecified
Short Description
Benign neoplasm of bone and articular cartilage, unspecified
Same as the full description in the CMS dataset.
Parent Code
D16
Benign neoplasm of bone and articular cartilage

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD16Benign neoplasm of bone and articular cartilage
This CodeD16.9Benign neoplasm of bone and articular cartilage, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ameloblastoma of jaw
  • Benign chondroblastoma of bone
  • Benign chondrogenic neoplasm
  • Benign neoplasm of articular cartilage
  • Benign neoplasm of bone
  • Benign osteogenic neoplasm of articular cartilage of limb
  • Benign osteogenic neoplasm of bone
  • Benign osteogenic neoplasm of bone of limb
  • Bilateral benign neoplasm of bone of lower limbs
  • Bizarre parosteal osteochondromatous proliferation
  • Chondroma of bone
  • Chondromatosis
  • Chondromyxoid fibroma of bone
  • Enchondroma of bone
  • Endosteal osteoma
  • Fibro-osteoma
  • Intraosseous lipoma
  • Multiple osteochondroma
  • Osteoblastoma of bone
  • Osteochondroma
  • Osteochondroma of bone
  • Osteochondromyxoma
  • Osteoid osteoma
  • Osteoma
  • Osteoma mucosae
  • Osteoma of periosteum
  • Parosteal lipoma
  • Periosteal chondroma
  • Subungual exostosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Osteochondromatosis

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Osteoblastoma

    a benign, painful, tumor of bone characterized by the formation of osteoid tissue, primitive bone and calcified tissue. it occurs frequently in the spine of young persons. (from dorland, 27th ed; stedman, 25th ed)

  • Osteoma

    a benign tumor composed of bone tissue or a hard tumor of bonelike structure developing on a bone (homoplastic osteoma) or on other structures (heteroplastic osteoma). (from dorland, 27th ed)

  • Osteoma, Osteoid

    a benign osteoblastic tumor with central vascularized nidus surrounded by normal reactive bone. it occurs especially in second decade of life most commonly in the femoral neck but can occur in any bone and any site within a bone.

  • Osteomalacia

    disorder caused by an interruption of the mineralization of organic bone matrix leading to bone softening, bone pain, and weakness. it is the adult form of rickets resulting from disruption of vitamin d; phosphorus; or calcium homeostasis.

  • Chondromatosis

    multiple formation of chondromas. (dorland, 27th ed)

  • Chondromatosis, Synovial

    rare, benign, chronic, progressive metaplasia in which cartilage is formed in the synovial membranes of joints, tendon sheaths, or bursae. some of the metaplastic foci can become detached producing loose bodies. when the loose bodies undergo secondary calcification, the condition is called synovial osteochondromatosis.

  • Exostoses, Multiple Hereditary

    hereditary disorder transmitted by an autosomal dominant gene and characterized by multiple exostoses (multiple osteochondromas) near the ends of long bones. the genetic abnormality results in a defect in the osteoclastic activity at the metaphyseal ends of the bone during the remodeling process in childhood or early adolescence. the metaphyses develop benign, bony outgrowths often capped by cartilage. a small number undergo neoplastic transformation.

  • Osteochondroma

    a cartilage-capped benign tumor that often appears as a stalk on the surface of bone. it is probably a developmental malformation rather than a true neoplasm and is usually found in the metaphysis of the distal femur, proximal tibia, or proximal humerus. osteochondroma is the most common of benign bone tumors.

  • Osteochondromatosis

    a condition marked by the presence of multiple osteochondromas. (dorland, 27th ed)

Table of NeoplasmsClinical

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

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
bone (periosteum)C41.9C79.51–D16.9D48.0D49.2
bone (periosteum) › cartilage NECC41.9C79.51–D16.9D48.0D49.2
bone (periosteum) › cuneiformC41.9C79.51–D16.9D48.0D49.2
bone (periosteum) › limb NECC40.9C79.51–D16.9––
cartilage (articular) (joint) NEC [See Also: Neoplasm, bone]C41.9C79.51–D16.9D48.0D49.2
joint NEC [See Also: Neoplasm, bone]C41.9C79.51–D16.9D48.0D49.2
skeleton, skeletal NECC41.9C79.51–D16.9D48.0D49.2

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 D16.9 to ICD-9-CMHistory

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

ICD-9-CM
213.9 Benign neo bone NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D16.9Overview

Is D16.9 (Benign neoplasm of bone and articular cartilage) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of bone and articular cartilage, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D16.9 group to?

When benign neoplasm of bone and articular cartilage, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D16.9?

Under the General Equivalence Mappings, benign neoplasm of bone and articular cartilage, unspecified converts to ICD-9-CM 213.9 (benign neo bone NOS). The mapping is a direct match.

Footnotes

[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.