← The evidence ledger
Evidence row 73183
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://data.spencermcw.com/v1/hospital/payers
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- dd53a3b6df6d7141190b2774bb4e3b27145c3746b7918e34e21fac06e2c8ad56
- Leaf
- 0x97b528a75bbe11be26c9c9abfee8f3c069c3412fa3f44890928ea99302c8ddc8
What was observed
{
"endpoints": [
[
"x402",
"https://data.spencermcw.com/v1/hospital/payers"
]
],
"name": "data.spencermcw.com/v1/hospital/payers",
"owner_address": "0xe6900ae625875b748f56fb45c3e06a59be8870df",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xE6900aE625875b748f56Fb45C3e06a59Be8870DF",
"scheme": "exact"
}
],
"description": "Negotiated prices for one billing code in one area, per canonical payer and plan type",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"code": "470",
"plan_type": "commercial",
"radius_miles": 15,
"zip": "80631"
},
"type": "http"
},
"output": {
"example": {
"data": {
"code": {
"code": "470",
"description": "MAJOR HIP AND KNEE JOINT REPLACEMENT OR REATTACHMENT OF LOWER EXTREMITY WITHOUT MCC",
"description_source": "cms_ms_drg",
"drg": {
"amlos": 2.3,
"gmlos": 2,
"kind": "SURG",
"mdc": "08",
"weight": 1.9563
},
"mrfs_statewide": 45,
"type": "MS-DRG"
},
"filters": {
"plan_type": "commercial",
"setting": null
},
"hospitals_with_prices": 2,
"location": {
"lat": 40.4447,
"lon": -104.6794,
"radius_miles": 15,
"zip": "80631"
},
"payers": [
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 2,
"methodology": "case rate",
"negotiated_dollar": {
"max": "62303.47",
"median": "58474.6",
"min": "32550.19",
"n": 5,
"p10": "32550.19",
"p90": "62303.47"
},
"payer": "Anthem Blue Cross and Blue Shield (Elevance Health)",
"payer_id": "anthem",
"plan_type": "commercial",
"rates": 5
},
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 2,
"methodology": "case rate",
"negotiated_dollar": {
"max": "70238.96",
"median": "58937.54",
"min": "58937.54",
"n": 2,
"p10": "58937.54",
"p90": "70238.96"
},
"payer": "Aetna (CVS Health)",
"payer_id": "aetna",
"plan_type": "commercial",
"rates": 2
},
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 1,
"methodology": "case rate",
"negotiated_dollar": {
"max": "59871.13",
"median": "46501.92",
"min": "42541.89",
"n": 3,
"p10": "42541.89",
"p90": "59871.13"
},
"payer": "Cigna Healthcare",
"payer_id": "cigna",
"plan_type": "commercial",
"rates": 3
},
{
"confidence": 0.6,
"fallback_rates": 3,
"hospitals": 1,
"methodology": "fee schedule",
"negotiated_dollar": {
"max": "46767.99",
"median": "42182.9",
"min": "22008.47",
"n": 3,
"p10": "22008.47",
"p90": "46767.99"
},
"payer": "Other payer",
"payer_id": "other",
"plan_type": "commercial",
"rates": 3
},
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 1,
"methodology": "case rate",
"negotiated_dollar": {
"max": "42605.54",
"median": "37789.08",
"min": "37789.08",
"n": 2,
"p10": "37789.08",
"p90": "42605.54"
},
"payer": "Kaiser Permanente",
"payer_id": "kaiser",
"plan_type": "commercial",
"rates": 2
},
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 1,
"methodology": "case rate",
"negotiated_dollar": {
"max": "66736.08",
"median": "49185.02",
"min": "49185.02",
"n": 2,
"p10": "49185.02",
"p90": "66736.08"
},
"payer": "UnitedHealthcare",
"payer_id": "unitedhealthcare",
"plan_type": "commercial",
"rates": 2
},
{
"confidence": 1,
"fallback_rates": 0,
"hospitals": 1,
"methodology": "fee schedule",
"negotiated_dollar": {
"max": "32750.43",
"median": "32750.43",
"min": "32750.43",
"n": 1,
"p10": "32750.43",
"p90": "32750.43"
},
"payer": "Denver Health Medical Plan",
"payer_id": "denver_health_medical_plan",
"plan_type": "commercial",
"rates": 1
},
{
"confidence": 0.6,
"fallback_rates": 1,
"hospitals": 1,
"methodology": "case rate",
"negotiated_dollar": {
"max": "38245.26",
"median": "38245.26",
"min": "38245.26",
"n": 1,
"p10": "38245.26",
"p90": "38245.26"
},
"payer": "Other payer",
"payer_id": "other",
"plan_type": "commercial",
"rates": 1
}
],
"payers_total": 8
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"code": {
"pattern": "^[0-9A-Za-z]{3,5}$",
"type": "string"
},
"code_type": {
"enum": [
"CPT",
"HCPCS",
"MS-DRG"
],
"type": "string"
},
"lat": {
"maximum": 90,
"minimum": -90,
"type": "number"
},
"lon": {
"maximum": 180,
"minimum": -180,
"type": "number"
},
"plan_type": {
"enum": [
"commercial",
"medicare_advantage",
"medicaid",
"medicare",
"exchange",
"tricare",
"va",
"workers_comp",
"auto",
"supplemental",
"other",
"unspecified"
],
"type": "string"
},
"radius_miles": {
"exclusiveMinimum": 0,
"maximum": 100,
"type": "number"
},
"setting": {
"enum": [
"inpatient",
"outpatient"
],
"type": "string"
},
"zip": {
"pattern": "^\\d{5}$",
"type": "string"
}
},
"required": [
"code"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"additionalProperties": false,
"properties": {
"code": {
"additionalProperties": false,
"properties": {
"code": {
"type": "string"
},
"description": {
"type": [
"string",
"null"
]
},
"description_source": {
"anyOf": [
{
"enum": [
"cms_hcpcs_level_ii",
"cms_ms_drg"
],
"type": "string"
},
{
"type": "null"
}
]
},
"drg": {
"anyOf": [
{
"additionalProperties": false,
"properties": {
"amlos": {
"type": [
"number",
"null"
]
},
"gmlos": {
"type": [
"number",
"null"
]
},
"kind": {
"type": [
"string",
"null"
]
},
"mdc": {
"type": [
"string",
"null"
]
},
"weight": {
"type": [
"number",
"null"
]
}
},
"required": [
"mdc",
"kind",
"weight",
"gmlos",
"amlos"
],
"type": "object"
},
{
"type": "null"
}
]
},
"mrfs_statewide": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"type": {
"enum": [
"CPT",
"HCPCS",
"MS-DRG"
],
"type": "string"
}
},
"required": [
"type",
"code",
"description",
"description_source",
"drg",
"mrfs_statewide"
],
"type": "object"
},
"filters": {
"additionalProperties": false,
"properties": {
"plan_type": {
"type": [
"string",
"null"
]
},
"setting": {
"type": [
"string",
"null"
]
}
},
"required": [
"setting",
"plan_type"
],
"type": "object"
},
"hospitals_with_prices": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"location": {
"additionalProperties": false,
"properties": {
"lat": {
"type": "number"
},
"lon": {
"type": "number"
},
"radius_miles": {
"type": "number"
},
"zip": {
"type": [
"string",
"null"
]
}
},
"required": [
"zip",
"lat",
"lon",
"radius_miles"
],
"type": "object"
},
"payers": {
"items": {
"additionalProperties": false,
"properties": {
"confidence": {
"type": "number"
},
"fallback_rates": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"hospitals": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"methodology": {
"anyOf": [
{
"enum": [
"case rate",
"fee schedule",
"percent of total billed charges",
"per diem",
"other"
],
"type": "string"
},
{
"type": "null"
}
]
},
"negotiated_dollar": {
"anyOf": [
{
"additionalProperties": false,
"properties": {
"max": {
"pattern": "^\\d{1,12}(\\.\\d{1,6})?$",
"type": "string"
},
"median": {
"pattern": "^\\d{1,12}(\\.\\d{1,6})?$",
"type": "string"
},
"min": {
"pattern": "^\\d{1,12}(\\.\\d{1,6})?$",
"type": "string"
},
"n": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"p10": {
"pattern": "^\\d{1,12}(\\.\\d{1,6})?$",
"type": "string"
},
"p90": {
"pattern": "^\\d{1,12}(\\.\\d{1,6})?$",
"type": "string"
}
},
"required": [
"n",
"min",
"p10",
"median",
"p90",
"max"
],
"type": "object"
},
{
"type": "null"
}
]
},
"payer": {
"type": "string"
},
"payer_id": {
"type": "string"
},
"plan_type": {
"type": "string"
},
"rates": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
}
},
"required": [
"payer_id",
"payer",
"plan_type",
"methodology",
"hospitals",
"rates",
"negotiated_dollar",
"fallback_rates",
"confidence"
],
"type": "object"
},
"type": "array"
},
"payers_total": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
}
},
"required": [
"code",
"location",
"filters",
"hospitals_with_prices",
"payers_total",
"payers"
],
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-21T05:32:59.895Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-21T05:32:59.721Z"
},
"resource": "https://data.spencermcw.com/v1/hospital/payers",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Negotiated prices for one billing code in one area, per canonical payer and plan type"
}What the leaf hashes
{"body":"dd53a3b6df6d7141190b2774bb4e3b27145c3746b7918e34e21fac06e2c8ad56","id":73183,"kind":"listing","method":"baseline/1","observed_us":1793025487135619,"prev":null,"subject":"x402_bazaar:https://data.spencermcw.com/v1/hospital/payers","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x97b51b962b9dfcf58180043c81e9ff1523ebd1c7125fbbcccecc0093f7f12df3
- 0xefab5a867948db6c3fdcf705a696abe315a2124a7dd2138540ee65a0fb1c2532
- 0x764b94640513afa4aab489cae5dc29a6a40f4a367e1f21ab91096d694276de0f
- 0xf52294ef4ab468b06f84d4dc5828f051089494bd09389c1983c6e51dcec8907a
- 0x67a67b99f02fd3873988b68967508ae54e0798f9cfabc0981e4d3143aef2e4fd
- 0xc25e71b609f1dce160e40e3198f6becc5b09dc52e5c0cc50f8e3b78656b80774
- 0x322473dbe2b011e5d18c6ce2aa91ce4dee8e9f5e002048cf0afeee32d6dc3641
- 0xda74898d5076c96fbfe2c04a9db8f5b1a72fc21e8edd33332fbe52e1bfc7b7e7
- 0x5dface5ed4838bbe8c4aa2e14c551eb4a6a49a2c39ad138ddd25810394a02f8a
- 0xdc53c89cce7091adf601946635a4d64062fe6855a2f46a4967374baab5240ceb
- 0x33109041c3d120f5b9ce2c3270a8fc409acfab4e749a0ff42fa0744354f87c17
- 0xd43b73151a0c2d9a61f2ae73ed148938b0e6b05c81197f7eebbf95dba38a7004
- 0xb314422bc93e7f1c0b706c67f5fff96c5ddf74934bb2fe8ab6291ae016907e37
- 0x49062da782c4f73855ddd5fdd51840749f928b5f17d1ce75ac50f2d829104e72
- 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
- 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae