ASA Physical Status Classification

ASA-PS

Return the caller-assigned ASA Physical Status class 1-6 with optional emergency suffix E and the published class definition (ASA 2014, last amended 2020).

LIVE $0.005 USDC GET /api/calc/asa_physical_status

Markdown: /docs/asa-physical-status.md · Canonical: https://magentlab.com/docs/asa-physical-status

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Return the caller-assigned ASA Physical Status class 1-6 with optional emergency suffix E and the published class definition (ASA 2014, last amended 2020).

When to use

When an agent already has an ASA Physical Status class 1-6 and whether the case is an emergency, and needs the canonical label (e.g. 1 or 2E) and published definition. magent does not examine the patient or assign the class. Not Gupta MICA and not Mallampati.

When not to use

Not a medical device. Classification alone does not predict perioperative risk (ASA statement).
The caller assigns ASA class 1-6 and the emergency flag. magent does not examine the patient. Examples in the ASA table (for example BMI) are not extra scored items.
Not an anesthetic plan. Not Gupta 2011 MICA (ASA 1-5 only). Not Mallampati.

Formula

Caller-assigned ASA Physical Status class 1-6; append E when emergency is true (ASA House of Delegates 2014, last amended 2020)

Citation

Title: ASA Physical Status Classification System
Authors: American Society of Anesthesiologists; Committee of Oversight: Economics
Source: Approved by the ASA House of Delegates on October 15, 2014, and last amended on December 13, 2020
DOI: none

Worked example

ASA 1 not emergency

Given: asa_class=1emergency=false

asa_class 1, emergency false → asa_label 1; a normal healthy patient

ASA 2E emergency

Given: asa_class=2emergency=true

asa_class 2, emergency true → asa_label 2E; mild systemic disease with E suffix

Also searched as

ASA physical status
ASA-PS
ASA class
ASA classification
ASA 1-6
ASA emergency E
physical status classification
ASA 2020

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/asa_physical_status?asa_class=1&emergency=false

Full URL: https://api.magentlab.com/api/calc/asa_physical_status?asa_class=1&emergency=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/asa_physical_status?asa_class=1&emergency=false"

Parameters

Name	Type	Required	Description
`asa_class`	integer	required	ASA Physical Status class 1-6 as assigned by the caller (1 a normal healthy patient; 2 mild systemic disease; 3 severe systemic disease; 4 severe systemic disease that is a constant threat to life; 5 moribund, not expected to survive without the operation; 6 declared brain-dead organ donor). Not Gupta 2011 MICA (ASA 1-5). magent does not examine the patient.
`emergency`	boolean	required	true appends E for emergency surgery: delay in treatment of the patient would lead to a significant increase in the threat to life or body part (ASA 2014/2020). Required. Class 6 may still take E. magent does not examine the patient.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/asa_physical_status Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "asa_class": "1",
      "emergency": "false"
    },
    {
      "asa_class": "1",
      "emergency": "false"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/asa_physical_status",
  "items": [
    {
      "description": "A normal healthy patient",
      "emergency": false,
      "components": [
        {
          "value": 1,
          "factor": "asa_class",
          "met": true
        },
        {
          "factor": "emergency",
          "met": false
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "American Society of Anesthesiologists; Committee of Oversight: Economics",
        "id": "asa-2020",
        "source": "Approved by the ASA House of Delegates on October 15, 2014, and last amended on December 13, 2020",
        "title": "ASA Physical Status Classification System"
      },
      "formula": "asa_physical_status",
      "formula_expression": "Caller-assigned ASA Physical Status class 1-6; append E when emergency is true (ASA House of Delegates 2014, last amended 2020)",
      "asa_class": 1,
      "asa_label": "1"
    },
    {
      "description": "A normal healthy patient",
      "emergency": false,
      "components": [
        {
          "value": 1,
          "factor": "asa_class",
          "met": true
        },
        {
          "factor": "emergency",
          "met": false
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "American Society of Anesthesiologists; Committee of Oversight: Economics",
        "id": "asa-2020",
        "source": "Approved by the ASA House of Delegates on October 15, 2014, and last amended on December 13, 2020",
        "title": "ASA Physical Status Classification System"
      },
      "formula": "asa_physical_status",
      "formula_expression": "Caller-assigned ASA Physical Status class 1-6; append E when emergency is true (ASA House of Delegates 2014, last amended 2020)",
      "asa_class": 1,
      "asa_label": "1"
    }
  ]
}

Response

Field	Type	Description
`formula`	string	asa_physical_status
`formula_expression`	string	Published ASA Physical Status class-plus-E rule
`asa_class`	integer	Caller-assigned class 1-6
`emergency`	boolean	true when the caller assigns the emergency suffix E
`asa_label`	string	Class as a string; E is appended when emergency is true (e.g. 1 or 2E)
`description`	string	ASA 2014/2020 definition for that class
`components`	array	asa_class and emergency criterion rows
`citation`	object	ASA Physical Status 2014/2020
`disclaimer`	string	Not a medical device

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "description": "A normal healthy patient",
  "emergency": false,
  "components": [
    {
      "value": 1,
      "factor": "asa_class",
      "met": true
    },
    {
      "factor": "emergency",
      "met": false
    }
  ],
  "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
  "citation": {
    "authors": "American Society of Anesthesiologists; Committee of Oversight: Economics",
    "id": "asa-2020",
    "source": "Approved by the ASA House of Delegates on October 15, 2014, and last amended on December 13, 2020",
    "title": "ASA Physical Status Classification System"
  },
  "formula": "asa_physical_status",
  "formula_expression": "Caller-assigned ASA Physical Status class 1-6; append E when emergency is true (ASA House of Delegates 2014, last amended 2020)",
  "asa_class": 1,
  "asa_label": "1"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
400	`invalid_asa_physical_status`	asa_class must be an integer from 1 to 6 (ASA Physical Status 2014/2020). Do not use Gupta 2011 invalid_asa_class (1-5). Returned before settlement; you are not charged.
400	`invalid_flag`	boolean clinical flags must be true or false Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

Mallampati — Return the Samsoon 1987 modified Mallampati class 1-4 from a caller-assigned integer, with a stable label.
RCRI — Sum the six Lee 1999 revised cardiac risk index factors and return class I–IV.
Gupta MICA — Compute the Gupta 2011 Table 2 logistic probability of 30-day myocardial infarction or cardiac arrest after surgery from age, ASA class, functional status, creatinine category, and surgery type.
Aldrete — Compute the Aldrete 1970 postanesthetic recovery score as the sum of five caller-assigned 0-2 signs (activity, respiration, circulation, consciousness, color) and return the 1970 recovery-room band.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
Execution is timeout-bounded and concurrency-capped.
Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.