NLM Clinical Tables

ICD-10-CM codes, diagnosis names and diagnosis code details

NLM Clinical Tables provides public clinical terminology tables, with diagnosis searches that may miss relevant codes and code explanations checked against current NLM and official classification sources.

Explain diagnosis code

Explain an ICD-10-CM diagnosis code with its official name, category, chapter, and whether it is billable. Codes are checked against the current NLM table and the corresponding official classification.

Your information

Code

ICD-10-CM diagnosis code as printed, with or without the dot (for example, E11.9 or E119).

1 credit per run

Example results

Code: E11.9
Chapter: Endocrine, nutritional and metabolic diseases
Billable: Yes
Page URL: clinicaltables.nlm.nih.gov
Category Code: E11
Category Name: Type 2 diabetes mellitus
Official Name: Type 2 diabetes mellitus without complications

Example data · Run in Studio for fresh results.

About NLM Clinical Tables

NLM Clinical Tables finds ICD-10-CM codes and official names from a plain-language condition description, with an optional result maximum.

Explain diagnosis code returns an official name, category, chapter, and billable status for a supplied ICD-10-CM code, with or without a dot.

Built by Fous from clinicaltables.nlm.nih.gov and checked automatically; it last passed a check on Sep 29, 2026. Fous is not affiliated with NLM Clinical Tables.

Actions

Explain diagnosis code

1 credit per run

What you provide

Field	Type	Required	Description
Code`code`	Text	Required	ICD-10-CM diagnosis code as printed, with or without the dot (for example, E11.9 or E119).Example: E119

What you get

Field	Type	Description
Code`code`	Text	Diagnosis code with a dot after the first three characters.Example: E11.9
Chapter`chapter`	Text	ICD-10-CM chapter name in words.Example: Endocrine, nutritional and metabolic diseases
Billable`billable`	Yes or no	Whether the code is sufficiently specific to bill.Example: Yes
Page URL`page_url`	Text	Link to the code in the NLM Clinical Tables search.Example: https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=E11.9&sf=code
Category Code`category_code`	Text	Three-character ICD-10-CM category code.Example: E11
Category Name`category_name`	Text	Official three-character category name.Example: Type 2 diabetes mellitus
Official Name`official_name`	Text	Official diagnosis name.Example: Type 2 diabetes mellitus without complications

Example result

For Code: E119

JSON

{
  "code": "E11.9",
  "chapter": "Endocrine, nutritional and metabolic diseases",
  "billable": true,
  "page_url": "https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=E11.9&sf=code",
  "category_code": "E11",
  "category_name": "Type 2 diabetes mellitus",
  "official_name": "Type 2 diabetes mellitus without complications"
}

Search diagnosis codes

1 credit per run

Find ICD-10-CM diagnosis codes and official names from a plain-language condition description. Results follow the source search order; broad or unfamiliar wording may not match every relevant code.

What you provide

Field	Type	Required	Description
Description`description`	Text	Required	Condition in plain words, such as "type 2 diabetes with kidney problems".Example: Asthma
Max Results`max_results`	Number	Optional	Maximum number of matching codes to return, such as 10 (up to 50).Example: 3

What you get

Field	Type	Description
Diagnosis Codes`diagnosis_codes`	List	Matching ICD-10-CM diagnosis codes, best match first.
Code`diagnosis_codes[].code`	Text	ICD-10-CM diagnosis code used on forms.Example: J45.998
Page URL`diagnosis_codes[].page_url`	Text	NLM record lookup link for this code.Example: https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=J45.998&sf=code&…
Official Name`diagnosis_codes[].official_name`	Text	Official ICD-10-CM diagnosis name.Example: Other asthma

Example result

For Description: Asthma, Max Results: 3

JSON

{
  "diagnosis_codes": [
    {
      "code": "J45.998",
      "page_url": "https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=J45.998&sf=code&df=code%2Cname&count=1",
      "official_name": "Other asthma"
    },
    {
      "code": "J82.83",
      "page_url": "https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=J82.83&sf=code&df=code%2Cname&count=1",
      "official_name": "Eosinophilic asthma"
    },
    {
      "code": "J45.909",
      "page_url": "https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?terms=J45.909&sf=code&df=code%2Cname&count=1",
      "official_name": "Unspecified asthma, uncomplicated"
    }
  ]
}

For developers

Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.

cURL

# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 120 \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@nlm-clinical-tables",
  "visibility": "public",
  "operation": "explain_diagnosis_code",
  "version": 1,
  "input": {
    "code": "E119"
  },
  "response": {
    "format": "json"
  }
}'

What you can do with it

Find diagnosis codes from condition descriptions
Look up official names for diagnosis codes
Check a code’s category and chapter
Determine whether a diagnosis code is billable

Questions

Is Fous affiliated with NLM Clinical Tables?

No. Fous is not affiliated with NLM Clinical Tables. This workflow reads the public clinicaltables.nlm.nih.gov website and returns its data.

How much does it cost?

Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.

Do I need a NLM Clinical Tables account?

No. You only need a Fous account.

How current is the data?

Fous gets the data from clinicaltables.nlm.nih.gov when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 29, 2026.