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.
| Scheme | Value | Source table | Link method | Confidence | Since | Provenance |
|---|---|---|---|---|---|---|
| npi | 1275724346 | nppes_providers | deterministic_pk | 1.000 | 2026-06-10 | evidencerecorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1275724346","entity_type_code":"2"} |
| pac_id | 2961596192 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1275724346","rule":"D-PECOS","enrlmt_id":"O20070919000600","pecos_asct_cntl_id":"2961596192"} |
| pecos_enrlmt_id | O20070919000600 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1275724346","rule":"D-PECOS","enrlmt_id":"O20070919000600"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| ← owns | EVERGREEN TWO LLC (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"03/18/2026","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0042796070","source_pk":57104,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | SHARON MAURICE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"04/22/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0547743023","source_pk":57105,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | OMNICARE LLC (RI) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0648219162","source_pk":57107,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | LUMENT REAL ESTATE CAPITAL, LLC (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"36","association_date":"05/01/2022","percentage_ownership":76} evidence: {"rule":"D-OWNER","owner_pac":"0749763118","source_pk":57108,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"36","role_text_owner":"5% OR GREATER MORTGAGE INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":76,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | LILLIAN SHARP | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"09/01/2016","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0941784987","source_pk":57109,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | CINDY JOHNSON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"09/18/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1355837717","source_pk":57111,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | JILL CHERRY | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"06/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1355837725","source_pk":57114,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | DAVID HELLER | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"09/18/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1456443332","source_pk":57116,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | FIFTH THIRD BANK (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"36","association_date":"03/07/2017","percentage_ownership":40} evidence: {"rule":"D-OWNER","owner_pac":"1557532637","source_pk":57119,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"36","role_text_owner":"5% OR GREATER MORTGAGE INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":40,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ESSEL W BAILEY | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"12/27/2012","percentage_ownership":74.06} evidence: {"rule":"D-OWNER","owner_pac":"1658340955","source_pk":57121,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":74.06,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | PLANTE & MORAN PLLC (MI) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2062936453","source_pk":57123,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | TRACY SUTTON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"07/12/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2668955154","source_pk":57124,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | DAVID ZETTER (KY) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"05/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2860664513","source_pk":57126,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ORION PROPERTIES FIFTEEN LLC (MI) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"05/01/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2961985338","source_pk":57128,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | BROAD RIVER REHABILITATION (NC) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"09/01/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3375801350","source_pk":57129,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | AMICUS CAPITAL HOLDINGS, INC. EMPLOYEE STOCK OWNERSHIP TRUST (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"08/18/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3870989262","source_pk":57130,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | JENNIFER VAGI | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"01/13/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4587148523","source_pk":57132,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | MIGUEL PAREDES | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/18/2021","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"4587150974","source_pk":57134,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | MELISSA KNIGHT | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4587949458","source_pk":57135,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | AMICUS CAPITAL HOLDINGS INC (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"08/18/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4688053606","source_pk":57137,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | OCS REAL ESTATE HOLDINGS LLC (MI) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4789160086","source_pk":57139,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | CELESTINE GAYLORD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/18/2017","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4789168717","source_pk":57140,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | CURT ANDERSON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"08/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"5698933935","source_pk":57142,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | SUSAN ALBRIGHT ROSS | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"07/12/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"5799695516","source_pk":57144,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | LEADERSTAT LTD (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6204125420","source_pk":57146,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | DONALD D FINNEY | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"12/27/2012","percentage_ownership":24.94} evidence: {"rule":"D-OWNER","owner_pac":"6608786025","source_pk":57147,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":24.94,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ORION OPERATING SERVICES LLC (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"05/16/2007","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"7012986318","source_pk":57149,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"34","role_text_owner":"5% OR GREATER DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | FORVIS MAZARS LLP (MO) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"06/01/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7416866603","source_pk":57151,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ATRIUM CENTERS MANAGEMENT LLC (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"05/16/2007","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"8729057021","source_pk":57152,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ABDALLAH AL-SHAHED (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"05/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"9234160722","source_pk":57154,"type_owner":"I","enrollment_id":"O20070919000600","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | ATRIUM CENTERS, LLC (OH) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"10/01/2007","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"9537258546","source_pk":57156,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
| ← owns | AMICUS PROPERTIES LLC (MI) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"9537645700","source_pk":57157,"type_owner":"O","enrollment_id":"O20070919000600","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ORION AUSTINBURG LLC"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
org · 1275724346 JSON
| Metric | Value | Asserted | Source |
|---|---|---|---|
| dba_name | <UNAVAIL> | 2026-06-10 | Centers for Medicare & Medicaid ServicesNPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… claim API: JSON |
| enumeration_date | 2007-08-05 | 2026-06-10 | Centers for Medicare & Medicaid ServicesNPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… claim API: JSON |
| legal_business_name | ORION AUSTINBURG LLC | 2026-06-10 | Centers for Medicare & Medicaid ServicesNPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… claim API: JSON |
| practice_state | OH | 2026-06-10 | Centers for Medicare & Medicaid ServicesNPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… claim API: JSON |
| primary_taxonomy | 314000000X | 2026-06-10 | Centers for Medicare & Medicaid ServicesNPPES NPI Registry (individuals) 202602 publisher: Centers for Medicare & Medicaid Services retrieved: 2026-06-10 sha256: 8b5267e250fd4df6… claim API: JSON |
Provider screening signals
NPI-keyed source families read directly for 1275724346: 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 staleExclusion 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.
14-tuple provenance (26)
Industry payments
None on file0 CMS Open Payments records on file for this NPI.
14-tuple provenance (1)
Order & referring eligibility
None on fileNo CMS Order and Referring record on file for this NPI.
14-tuple provenance (1)
Medicare opt-out
None on fileNo CMS Medicare opt-out affidavit on file for this NPI.
14-tuple provenance (1)
Revalidation
On file1 Medicare enrollment record on file.
- Due date: TBD upstream — not due within the ensuing six months.
14-tuple provenance (1)
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=…