TERMINAL · ENTITY CARD · ORGANIZATION

SNOWSHOE LTC GROUP, LLC

Canonical entity in the resolved graph · NC · methodology entity-graph/v1 · 64959a27-19e4-44e3-baef-36c0170dc9a8

active

Cross-source identifiers

Every current identifier attachment, with the link method and confidence carried verbatim — deterministic links are 1.000; probabilistic links surface their real matcher confidence, never rounded up.

Current identifier attachments with link confidence
Scheme	Value	Source table	Link method	Confidence	Since	Provenance
npi	1326074048	nppes_providers	deterministic_pk	1.000	2026-06-10	evidence recorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1326074048","entity_type_code":"2"}
pecos_enrlmt_id	O20110223000518	pecos_providers	exact_npi_in_pecos	1.000	2026-06-16	evidence recorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1326074048","rule":"D-PECOS","enrlmt_id":"O20110223000518"}

Graph edges

One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.

Current 1-hop graph edges
Relationship	Entity	Confidence	Source table	Provenance
← owns	RAYMOND GREGG HILL	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"01/01/2011","percentage_ownership":18.47} evidence: {"rule":"D-OWNER","owner_pac":"0648188227","source_pk":98682,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":18.47,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	ROBERT O'NEIL HILL	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"01/01/2011","percentage_ownership":20.6} evidence: {"rule":"D-OWNER","owner_pac":"1557279130","source_pk":98684,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":20.6,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	STEPHEN BRITT HILL	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"01/01/2011","percentage_ownership":20.02} evidence: {"rule":"D-OWNER","owner_pac":"2466360045","source_pk":98686,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":20.02,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	GALE R BOICE	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"03/05/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2860737442","source_pk":98688,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	DIANNE JOHNSON	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"01/01/2011","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3274714464","source_pk":98690,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	HOLLY BERNARDINI (NC)	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2004","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4183689656","source_pk":98691,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	PRINCIPLE LONG TERM CARE, INC. (NC)	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"01/01/2011","percentage_ownership":50} evidence: {"rule":"D-OWNER","owner_pac":"5193906386","source_pk":98692,"type_owner":"O","enrollment_id":"O20110223000518","role_code_owner":"34","role_text_owner":"5% OR GREATER DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":50,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	PRINCIPLE IT SERVICES, INC. (NC)	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"01/01/2011","percentage_ownership":50} evidence: {"rule":"D-OWNER","owner_pac":"7810178001","source_pk":98694,"type_owner":"O","enrollment_id":"O20110223000518","role_code_owner":"34","role_text_owner":"5% OR GREATER DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":50,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}
← owns	OLIVIA ARMIJO	1.000	snf_all_owners	evidence recorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"04/14/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7911330550","source_pk":98695,"type_owner":"I","enrollment_id":"O20110223000518","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"SNOWSHOE LTC GROUP, LLC"}

Current record

Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.

org · 1326074048 JSON

Current claims for org 1326074048
Metric	Value	Asserted	Source
dba_name	<UNAVAIL>	2026-06-10	Centers for Medicare & Medicaid Services NPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… Upstream source claim API: JSON
enumeration_date	2006-06-24	2026-06-10	Centers for Medicare & Medicaid Services NPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… Upstream source claim API: JSON
legal_business_name	SNOWSHOE LTC GROUP, LLC	2026-06-10	Centers for Medicare & Medicaid Services NPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… Upstream source claim API: JSON
practice_state	NC	2026-06-10	Centers for Medicare & Medicaid Services NPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… Upstream source claim API: JSON
primary_taxonomy	314000000X	2026-06-10	Centers for Medicare & Medicaid Services NPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… Upstream source claim API: JSON

Provider screening signals

NPI-keyed source families read directly for 1326074048: federal and state integrity lists, CMS Open Payments, Order and Referring eligibility, Medicare opt-out, and enrollment revalidation. Cells expose the source and provenance fields supplied by the selected record. A screening aid — re-confirm any match against the primary source before acting; absence means nothing on file in the data Fonteum currently holds, never a guarantee none exists.

Sanctions & integrity

Coverage stale

Exclusion coverage is stale or cannot be reconciled to an attested source artifact. This result is indeterminate and must not be treated as a clearance; check the current issuing-agency lists.

Coverage status: indeterminate
Screened 26 integrity lists; no negative determination was made.

Source:OIG LEIE +25 moreChecked 2026-09-20

14-tuple provenance (26)

OIG LEIE

source: HHS Office of Inspector General (LEIE)

dataset_id: oig-leie

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: 1977-10-25

coverage_end: ongoing

slsa_provenance_url: —

upstream source

SAM.gov Exclusions

source: U.S. General Services Administration (GSA), System for Award Management (SAM.gov)

dataset_id: sam-gov-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: 2012-07-30

coverage_end: ongoing

slsa_provenance_url: —

upstream source

NY Medicaid (OMIG)

source: NY Office of the Medicaid Inspector General (OMIG)

dataset_id: ny-omig-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: NY-OMIG-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

OH Medicaid (ODM)

source: Ohio Department of Medicaid (ODM)

dataset_id: oh-odm-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: OH-ODM-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

GA Medicaid (DCH OIG)

source: Georgia DCH Office of Inspector General

dataset_id: ga-dch-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: GA-DCH-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

PA Medicaid (Medicheck)

source: Pennsylvania Department of Human Services (DHS)

dataset_id: pa-dhs-medicheck

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: PA-DHS-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

NC Medicaid (DHHS)

source: NC DHHS, Division of Health Benefits (NC Medicaid)

dataset_id: nc-dhhs-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: NC-DHHS-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MD Medicaid

source: Maryland Department of Health (MDH)

dataset_id: md-mdh-sanctioned

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MD-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

WA Medicaid

source: Washington State Health Care Authority (HCA)

dataset_id: wa-hca-termination-exclusion

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: WA-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

IA Medicaid

source: Iowa Health and Human Services (Iowa Medicaid)

dataset_id: ia-medicaid-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: IA-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MS Medicaid

source: Mississippi Division of Medicaid (DOM)

dataset_id: ms-dom-sanctioned

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MS-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MT Medicaid

source: Montana Department of Public Health and Human Services (DPHHS)

dataset_id: mt-dphhs-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MT-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

CO Medicaid

source: Colorado Department of Health Care Policy & Financing (HCPF)

dataset_id: co-hcpf-terminations

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: CO-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

IN Medicaid

source: Indiana FSSA, Office of Medicaid Policy and Planning (OMPP)

dataset_id: in-ompp-terminations

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: IN-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

KS Medicaid

source: Kansas Department of Health and Environment, Division of Health Care Finance (KDHE-DHCF)

dataset_id: ks-kmap-terminations

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: KS-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

KY Medicaid

source: Kentucky CHFS, Department for Medicaid Services (DMS)

dataset_id: ky-dms-terminations

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: KY-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

NH Medicaid

source: New Hampshire Department of Health and Human Services (DHHS)

dataset_id: nh-dhhs-sanctions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: NH-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

ND Medicaid

source: North Dakota Health and Human Services (HHS), Medicaid Program Integrity

dataset_id: nd-hhs-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: ND-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

TN Medicaid

source: Tennessee TennCare, Office of Program Integrity

dataset_id: tn-tenncare-terminated

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: TN-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MI Medicaid

source: Michigan Department of Health and Human Services (MDHHS), Medicaid Program Integrity

dataset_id: mi-mdhhs-sanctions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MI-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

LA Medicaid

source: Louisiana Department of Health (LDH), Program Integrity

dataset_id: la-ldh-adverse-actions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: LA-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

SC Medicaid

source: South Carolina Department of Health and Human Services (SCDHHS), Program Integrity

dataset_id: sc-scdhhs-sanctioned

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: SC-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MA Medicaid

source: Massachusetts MassHealth (EOHHS), Office of Program Integrity

dataset_id: ma-masshealth-exclusions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MA-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

MO Medicaid

source: Missouri Medicaid Audit and Compliance (MMAC), Department of Social Services

dataset_id: mo-mmac-sanctions

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: indeterminate, not_reconciled_to_attested_artifact, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: MO-public-records

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

OIG CIA

source: HHS Office of Inspector General — Corporate Integrity Agreements

dataset_id: oig-cia

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: not_flagged, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

CMS Penalties

source: Centers for Medicare & Medicaid Services (CMS) — Civil Money Penalties

dataset_id: cms-cmp

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: not_flagged, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: —

coverage_end: —

slsa_provenance_url: —

upstream source

Industry payments

None on file

0 CMS Open Payments records on file for this NPI.

Source:CMS Open PaymentsChecked 2026-09-20

14-tuple provenance (1)

CMS Open Payments

source: CMS Open Payments (Sunshine Act physician payment disclosures)

dataset_id: cms-open-payments

snapshot: —

methodology: open-payments/v1

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: not_present, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: 2013-08-01

coverage_end: ongoing

slsa_provenance_url: —

upstream source

Order & referring eligibility

None on file

No CMS Order and Referring record on file for this NPI.

Source:CMS Order and ReferringChecked 2026-09-20

14-tuple provenance (1)

CMS Order and Referring

source: Centers for Medicare & Medicaid Services (CMS)

dataset_id: cms-order-referring

snapshot: —

methodology: cms-order-referring/v1

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: not_present, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: —

coverage_end: ongoing

slsa_provenance_url: —

upstream source

Medicare opt-out

None on file

No CMS Medicare opt-out affidavit on file for this NPI.

Source:CMS Opt Out AffidavitsChecked 2026-09-20

14-tuple provenance (1)

CMS Opt Out Affidavits

source: Centers for Medicare & Medicaid Services (CMS)

dataset_id: cms-opt-out-affidavits

snapshot: —

methodology: cms-opt-out/v1

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: not_present, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: 1998-01-01

coverage_end: ongoing

slsa_provenance_url: —

upstream source

Revalidation

On file

1 Medicare enrollment record on file.

Due date: TBD upstream — not due within the ensuing six months.

Source:CMS Medicare Revalidation Due Date ListChecked 2026-09-20

14-tuple provenance (1)

CMS Medicare Revalidation Due Date List

source: Centers for Medicare & Medicaid Services (CMS)

dataset_id: cms-revalidation-due-dates

snapshot: —

methodology: v2026.05.0

last_checked: 2026-09-20T14:15:36.633Z

confidence: 1

data_availability: present, snapshot_date_unavailable

pipeline_version: b1fa680

doi: —

license: US-Government-Works

coverage_start: 2011-03-25

coverage_end: ongoing

slsa_provenance_url: —

upstream source

Point-in-time

Query retained claim coordinates under bitemporal-read/v1. Most facts have no superseded row; dates outside retained coverage may return no prior version, and diffs require both coordinates.

Pick a date to reconstruct, or two dates to diff. Equivalent JSON: /api/v1/history/{subject_type}/{subject_id}?at=… and …/diff?from=…&to=…