ICD-9 Code 733.99

Other disorders of bone and cartilage

Not Valid for Submission

733.99 is a legacy non-billable code used to specify a medical diagnosis of other disorders of bone and cartilage. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 733.99
Short Description:Bone & cartilage dis NEC
Long Description:Other disorders of bone and cartilage

Convert 733.99 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • M89.30 - Hypertrophy of bone, unspecified site
  • M89.8X9 - Other specified disorders of bone, unspecified site
  • M94.8X9 - Other specified disorders of cartilage, unspecified sites

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (710–739)
    • Osteopathies, chondropathies, and acquired musculoskeletal deformities (730-739)
      • 733 Other disorders of bone and cartilage

Information for Medical Professionals


  • Adynamic bone disease
  • Aluminum bone disease
  • Aluminum-related fracturing osteodystrophy
  • Astronaut-bone demineralization syndrome
  • Benign cortical defect of bone
  • Bipartite ossification
  • Bone resorption disorder
  • Bone turnover rate decreased
  • Bone turnover rate increased
  • Bony weight bearing disorder
  • Bruck syndrome
  • Calcification of laryngeal cartilage
  • Cartilage resorption disorder
  • Chondritis
  • Chondrolysis of articular cartilage
  • Chondrolysis of the femoral head
  • Compensatory hypertrophy of bone
  • Continuity defect of mandible
  • Craniomandibular osteopathy
  • Decreased maintenance of bone matrix
  • Decreased osteoblast function
  • Delayed epiphyseal closure
  • Diaphysitis
  • Disseminated idiopathic skeletal hyperostosis
  • Dumbbell ossification
  • Elongated styloid process syndrome
  • Eosinophilic panostitis
  • Epiphysis closure disorder
  • Epiphysis formation disorder
  • Fibrocartilage lesion of joint
  • Gorham's disease
  • Heterotopic ossification
  • Hyperplasia of zygomatic bone
  • Hypertrophy of bone
  • Idiopathic hypertrophy of bone
  • Incomplete ossification
  • Incomplete ossification of ilium
  • Incomplete ossification of ischium
  • Incomplete ossification of pubis
  • Increased bone formation
  • Infectious disorder of cartilage
  • Interrupted ossification
  • Lack of bone formation
  • Lesion of clavicle
  • Metabolic bone disease
  • Mouth and genital ulcers with inflamed cartilage syndrome
  • Nonossified fibroma of bone
  • Notching of ribs
  • On examination - bone - crepitus
  • On examination - bone-abnormal thickness
  • On examination - joint:bone end thickened
  • Osteoclasia
  • Osteoid formation disorder
  • Osteolysis
  • Osteopathia striata with cranial sclerosis
  • Perichondritis
  • Premature epiphyseal closure
  • Reduced ossification
  • Relapsing polychondritis
  • Relapsing polychondritis of larynx
  • Retained endochondral cartilage cores
  • Sesamoiditis
  • Skeletal fluorosis
  • Subperiosteal hemorrhage
  • Van Bucken's disease
  • Whyte Hemingway carpal tarsal phalangeal osteolyses
  • Xiphoidalgia syndrome

Index to Diseases and Injuries

References found for the code 733.99 in the Index of Diseases and Injuries:

Information for Patients

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone. To have strong bones when you are young, and to prevent bone loss when you are older, you need to get enough calcium, vitamin D and exercise.

There are many kinds of bone problems:

  • Low bone density and osteoporosis, which make your bones weak and more likely to break
  • Osteogenesis imperfecta makes your bones brittle
  • Paget's disease of bone makes them weak
  • Bone disease can make bones easy to break
  • Bones can also develop cancer and infections
  • Other bone diseases are caused by poor nutrition, genetic factors or problems with the rate of bone growth or rebuilding

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

  • ALP - blood test
  • ALP isoenzyme test
  • Blount's disease
  • Bone lesion biopsy
  • Bone pain or tenderness
  • Bone tumor
  • Bowlegs
  • Calcium blood test
  • Craniotabes
  • Fibrous dysplasia
  • Osteomalacia
  • Osteopenia - premature infants
  • Skeletal limb abnormalities
  • X-ray - skeleton

[Read More]

Cartilage Disorders

Cartilage is the tough but flexible tissue that covers the ends of your bones at a joint. It also gives shape and support to other parts of your body, such as your ears, nose and windpipe. Healthy cartilage helps you move by allowing your bones to glide over each other. It also protects bones by preventing them from rubbing against each other.

Injured, inflamed, or damaged cartilage can cause symptoms such as pain and limited movement. It can also lead to joint damage and deformity. Causes of cartilage problems include

  • Tears and injuries, such as sports injuries
  • Genetic factors
  • Other disorders, such as some types of arthritis

Osteoarthritis results from breakdown of cartilage.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

  • Costochondritis
  • Meniscus tears -- aftercare
  • Pectus carinatum
  • Pectus excavatum
  • Pectus excavatum - discharge
  • Pectus excavatum repair
  • Perichondritis
  • What Are Growth Plate Injuries? - NIH (National Institute of Arthritis and Musculoskeletal and Skin Diseases)

[Read More]

ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain 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.
  • Type 1 Excludes Notes - A 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.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.