Receipt r330

{
  "forbids": null,
  "inputs": {
    "code": "448"
  },
  "payload": {
    "basis": "measured",
    "basis_caveat": "n is a count of contract rows in this extract, not a count of transactions or of providers who perform the priced service, and it has not passed a claims-joined ghost-rate or plausibility filter",
    "basis_detail": {
      "inputs": [
        {
          "basis": "measured",
          "name": "rate_extract",
          "source": "rate extract, vintage 2026-09-30"
        }
      ],
      "rule": "A figure computed from inputs of more than one basis carries the weakest basis among them, strongest to weakest being measured, then cited, then assumption, so a figure is never stronger than the weakest input that produced it."
    },
    "cells": [
      {
        "largest_n_over_n": 1.0,
        "median": 70231.89,
        "n": 21973,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 47874.39,
        "p75": 92356.14,
        "payer": "cigna",
        "stddev": 34503.59,
        "stddev_over_median": 0.4913
      },
      {
        "largest_n_over_n": 1.0922,
        "median": 70125.9,
        "n": 20118,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 48315.0,
        "p75": 99998.1,
        "payer": "aetna",
        "stddev": 35739.47,
        "stddev_over_median": 0.5096
      },
      {
        "largest_n_over_n": 3.742,
        "median": 55849.19,
        "n": 5872,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 41728.52,
        "p75": 74958.7,
        "payer": "hcsc",
        "stddev": 36996.72,
        "stddev_over_median": 0.6624
      },
      {
        "largest_n_over_n": 4.0024,
        "median": 59508.85,
        "n": 5490,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 42783.3,
        "p75": 78391.36,
        "payer": "anthem",
        "stddev": 37737.54,
        "stddev_over_median": 0.6342
      },
      {
        "largest_n_over_n": 4.8218,
        "median": 60516.22,
        "n": 4557,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 42783.3,
        "p75": 80812.64,
        "payer": "bcbs-mn",
        "stddev": 39752.34,
        "stddev_over_median": 0.6569
      },
      {
        "largest_n_over_n": 4.9223,
        "median": 61076.76,
        "n": 4464,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 44735.54,
        "p75": 79960.62,
        "payer": "highmark",
        "stddev": 38779.36,
        "stddev_over_median": 0.6349
      },
      {
        "largest_n_over_n": 128.4971,
        "median": 53616.43,
        "n": 171,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 40486.92,
        "p75": 71720.41,
        "payer": "bcbs-north-carolina",
        "stddev": 22972.26,
        "stddev_over_median": 0.4285
      },
      {
        "largest_n_over_n": 2197.3,
        "median": 46224.65,
        "n": 10,
        "n_basis": "curated tree: one row per distinct rate, layered re-pulls removed",
        "p25": 43808.47,
        "p75": 55496.98,
        "payer": "centene",
        "stddev": 12602.92,
        "stddev_over_median": 0.2726
      }
    ],
    "code": "448",
    "largest_n_for_code": {
      "basis": "the largest row count any cell at or above the reporting floor carries for this code in this extract, and the denominator of every largest_n_over_n on this answer",
      "n": 21973,
      "payer": "cigna"
    },
    "name": "MS-DRG | Spinal fusion except cervical, multiple level - NYU edition, filed as MS448",
    "note": "sd_lo/sd_hi are median +/- 1 stddev, unclipped (can be negative or extreme for right-skewed distributions - see stddev vs median per row before treating sd_lo/sd_hi as a trustworthy range). Every cell carries n_basis, which says what that cell's n counts, because the cells here were not all assembled from the same tree and n is the denominator largest_n_over_n divides by. A cell marked curated comes from a tree that deduplicates on the full identity of a rate. A cell marked parquet comes from a tree where re-pulls of a month layer rather than replace, so its n is inflated by however many times that payer was re-pulled, and it is used only where the curated tree holds nothing for that payer and code. Measured 2026-08-27 on code 91200, parquet n against curated n: highmark 8,200,690 against 4,270,330, which is 1.9x, with median 27.24 and p75 39.53 identical in both; cigna 10.4x; bcbs-mn 2.8x; hcsc 2.0x. Never compare an n marked parquet against an n marked curated.",
    "quality_filter": "quality_flags & 3 = 0 (excludes pct_of_charge and phantom_suspect flagged rows), negotiated_rate > 0",
    "thinness_note": "Two figures beside each cell say how thin that cell's own evidence is, and neither is a verdict. stddev_over_median is the cell's own stddev divided by its own median, both of them figures on this same cell: a value well above one says the spread dwarfs the middle, which is a property of the rows behind the cell rather than a finding about what the payer pays. largest_n_over_n is the largest row count any cell at or above the reporting floor carries for this code in this extract, divided by this cell's own row count, and largest_n_for_code names the payer and the count that division used so the arithmetic can be redone from this payload. No threshold is applied to either figure, no cell is withheld or refused on account of either, and this world states no opinion about which values make a cell worth standing behind: that reading is the caller's, on evidence this answer states rather than on prose it does not carry.",
    "vintage": "2026-09-30",
    "world_version": "hammer-coverage-intelligence:2026-10-01+2"
  },
  "redeemed": false,
  "refused": false,
  "tool": "rate_position"
}