ICD-10-CM Use Additional Code Notes · Chapter 13 · FY 2027 M00-M99

Use Additional Code Notes in Chapter 13: Diseases of the musculoskeletal system and connective tissue ICD-10-CM

A Use Additional Code note means a second code should be added, after this one, to fully describe the condition. In Chapter 13 (M00-M99), notes printed in the chapter name other codes 67 times, and Use Additional Code Notes anywhere in the Tabular List name the chapter’s codes 10 times, covering 4 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
67
References in Its Notes
10
References to Its Codes
4
Chapter Codes Named
M00-M99
Chapter 13
Chapter 13

Use Additional Code Notes by the code that carries the note

34 of 34 shown
  • M00.0 Staphylococcal arthritis and polyarthritis applies to 24 codes
  • M00.2 Other streptococcal arthritis and polyarthritis applies to 24 codes
  • M00.8 Arthritis and polyarthritis due to other bacteria applies to 24 codes
    • code (B96) to identify bacteria
  • M10 Gout applies to 121 codes
    • Autonomic neuropathy in diseases classified elsewhere (G99.0)
    • Calculus of urinary tract in diseases classified elsewhere (N22)
    • Cardiomyopathy in diseases classified elsewhere (I43)
    • Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
    • Disorders of iris and ciliary body in diseases classified elsewhere (H22)
    • Glomerular disorders in diseases classified elsewhere (N08)
  • M10.2 Drug-induced gout applies to 24 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M1A Chronic gout applies to 242 codes
    • Autonomic neuropathy in diseases classified elsewhere (G99.0)
    • Calculus of urinary tract in diseases classified elsewhere (N22)
    • Cardiomyopathy in diseases classified elsewhere (I43)
    • Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
    • Disorders of iris and ciliary body in diseases classified elsewhere (H22)
    • Glomerular disorders in diseases classified elsewhere (N08)
  • M1A.2 Drug-induced chronic gout applies to 48 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M27.2 Inflammatory conditions of jaws
    • code (W88-W90, X39.0) to identify radiation, if radiation-induced
  • M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
    • acute kidney failure (N17.-)
    • acute respiratory distress syndrome (J80)
    • capillary leak syndrome (I78.8)
    • diffuse alveolar hemorrhage (R04.89)
    • encephalopathy (metabolic) (septic) (G93.41)
    • fluid overload, unspecified (E87.70)
    • graft versus host disease (D89.81-)
    • hemolytic uremic syndrome (D59.3-)
    • hepatic failure (K72.-)
    • hepatic veno-occlusive disease (K76.5)
    • idiopathic interstitial pneumonia (J84.11-)
    • sinusoidal obstruction syndrome (K76.5)
  • M32.0 Drug-induced systemic lupus erythematosus
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M32.19 Other organ or system involvement in systemic lupus erythematosus
    • code(s) to identify organ or system involvement, such as encephalitis (G05.3)
  • M34.2 Systemic sclerosis induced by drug and chemical
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M35.81 Multisystem inflammatory syndrome
    • exposure to COVID-19 or SARS-CoV-2 infection (Z20.822)
    • personal history of COVID-19 (Z86.16)
    • post COVID-19 condition (U09.9)
  • M46.3 Infection of intervertebral disc (pyogenic) applies to 10 codes
    • code (B95-B97) to identify infectious agent.
  • M60.0 Infective myositis applies to 39 codes
    • code (B95-B97) to identify infectious agent
  • M60.2 Foreign body granuloma of soft tissue, not elsewhere classified applies to 23 codes
    • code to identify the type of retained foreign body (Z18.-)
  • M65.0 Abscess of tendon sheath applies to 23 codes
    • code (B95-B96) to identify bacterial agent.
  • M70 Soft tissue disorders related to use, overuse and pressure applies to 75 codes
    • external cause code to identify activity causing disorder (Y93.-)
  • M71.0 Abscess of bursa applies to 24 codes
    • code (B95.-, B96.-) to identify causative organism
  • M71.1 Other infective bursitis applies to 24 codes
    • code (B95.-, B96.-) to identify causative organism
  • M72.6 Necrotizing fasciitis
    • code (B95.-, B96.-) to identify causative organism
  • M72.8 Other fibroblastic disorders
    • code to (B95.-, B96.-) identify causative organism
  • M80 Osteoporosis with current pathological fracture applies to 324 codes
    • code to identify major osseous defect, if applicable (M89.7-)
  • M80.8 Other osteoporosis with current pathological fracture applies to 162 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M81 Osteoporosis without current pathological fracture applies to 3 codes
    • major osseous defect, if applicable (M89.7-)
    • personal history of (healed) osteoporosis fracture, if applicable (Z87.310)
  • M81.8 Other osteoporosis without current pathological fracture
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M83.5 Other drug-induced osteomalacia in adults
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M86 Osteomyelitis applies to 195 codes
    • code (B95-B97) to identify infectious agent
    • code to identify major osseous defect, if applicable (M89.7-)
  • M87 Osteonecrosis applies to 217 codes
    • code to identify major osseous defect, if applicable (M89.7-)
  • M87.1 Osteonecrosis due to drugs applies to 44 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • M89.5 Osteolysis applies to 24 codes
    • code to identify major osseous defect, if applicable (M89.7-)
  • M89.6 Osteopathy after poliomyelitis applies to 24 codes
    • code (B91) to identify previous poliomyelitis
  • M93.0 Slipped upper femoral epiphysis (nontraumatic) applies to 32 codes
    • code for associated chondrolysis (M94.3)
  • M97.8 Periprosthetic fracture around other internal prosthetic joint applies to 3 codes
    • code to identify the joint (Z96.6-)

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Use Additional Code Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Use Additional Code Notes

What does a Use Additional Code note mean?

A Use Additional Code note tells you to add a second code, reported after the code that carries the note, to describe the condition completely. In an etiology/manifestation pair it sits at the etiology code and points to the manifestation (Section I.A.13). The FY 2027 Tabular List has 1,491 of them; 1,174 name other codes, with 1,438 references to 389 distinct codes, categories and ranges.

Where does the additional code go?

After the code carrying the note. For etiology/manifestation pairs the Guidelines are explicit: the etiology is sequenced first, followed by the manifestation code.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.