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 | 1811752413 | nppes_providers | deterministic_pk | 1.000 | 2026-06-10 | evidencerecorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1811752413","entity_type_code":"2"} |
| pac_id | 4284155599 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1811752413","rule":"D-PECOS","enrlmt_id":"O20250303002973","pecos_asct_cntl_id":"4284155599"} |
| pecos_enrlmt_id | O20250303002973 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1811752413","rule":"D-PECOS","enrlmt_id":"O20250303002973"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| ← owns | ALIYA OPERATIONS HOLDINGS LLC (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":80.98} evidence: {"rule":"D-OWNER","owner_pac":"0042668469","source_pk":266851,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":80.98,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 0042731226 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":1.62} evidence: {"rule":"D-OWNER","owner_pac":"0042731226","source_pk":266854,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":1.62,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 0143741322 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"71","association_date":"03/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0143741322","source_pk":266855,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"71","role_text_owner":"TRUSTEE OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | JORDAN REIFER | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":8.1} evidence: {"rule":"D-OWNER","owner_pac":"0345656518","source_pk":266856,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":8.1,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 1153842349 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":4.9} evidence: {"rule":"D-OWNER","owner_pac":"1153842349","source_pk":266857,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.9,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 1759806763 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"03/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1759806763","source_pk":266858,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | MORGAN ARENS | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2163943341","source_pk":266859,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 2466973664 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":2.49} evidence: {"rule":"D-OWNER","owner_pac":"2466973664","source_pk":266861,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2.49,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 2567983760 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":3.24} evidence: {"rule":"D-OWNER","owner_pac":"2567983760","source_pk":266862,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":3.24,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 2961923156 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":4.99} evidence: {"rule":"D-OWNER","owner_pac":"2961923156","source_pk":266863,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.99,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 3678094851 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":2.49} evidence: {"rule":"D-OWNER","owner_pac":"3678094851","source_pk":266864,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2.49,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 3779004973 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3779004973","source_pk":266865,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | ALIYA GB MEMBER A LLC (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":5.99} evidence: {"rule":"D-OWNER","owner_pac":"3779922836","source_pk":266866,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":5.99,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 3870014053 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":4.3} evidence: {"rule":"D-OWNER","owner_pac":"3870014053","source_pk":266867,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.3,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 3870014079 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3870014079","source_pk":266868,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | HAVEN CAPITAL LLC (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":5} evidence: {"rule":"D-OWNER","owner_pac":"4385165570","source_pk":266869,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":5,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 4486175676 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":0.86} evidence: {"rule":"D-OWNER","owner_pac":"4486175676","source_pk":266870,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.86,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | AVRUM WEINFELD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":12.15} evidence: {"rule":"D-OWNER","owner_pac":"5890691927","source_pk":266871,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":12.15,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 6507387784 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":0.35} evidence: {"rule":"D-OWNER","owner_pac":"6507387784","source_pk":266872,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.35,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 6608397880 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"71","association_date":"03/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6608397880","source_pk":266873,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"71","role_text_owner":"TRUSTEE OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 6709307986 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":0.42} evidence: {"rule":"D-OWNER","owner_pac":"6709307986","source_pk":266874,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.42,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 7214458413 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7214458413","source_pk":266875,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | SERGIO LUNA (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7810139292","source_pk":266876,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | DVORAH S WEINFELD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":41.31} evidence: {"rule":"D-OWNER","owner_pac":"8022185628","source_pk":266878,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":41.31,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | ALIYA FIVE HOLDINGS LLC (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"03/01/2024","percentage_ownership":99.99} evidence: {"rule":"D-OWNER","owner_pac":"8224486634","source_pk":266879,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"34","role_text_owner":"5% OR GREATER DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":99.99,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 8224559414 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"03/01/2024","percentage_ownership":0.01} evidence: {"rule":"D-OWNER","owner_pac":"8224559414","source_pk":266880,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.01,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 8325569510 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":4.99} evidence: {"rule":"D-OWNER","owner_pac":"8325569510","source_pk":266881,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.99,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | MOSHE ERLICH | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"03/01/2024","percentage_ownership":12.15} evidence: {"rule":"D-OWNER","owner_pac":"8628431772","source_pk":266882,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":12.15,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | EFRIAM WEINFELD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"8628462520","source_pk":266883,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 9133640337 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"9133640337","source_pk":266886,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 9335660513 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":1.62} evidence: {"rule":"D-OWNER","owner_pac":"9335660513","source_pk":266887,"type_owner":"I","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":1.62,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
| ← owns | OWNER PAC 9638690837 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"03/01/2024","percentage_ownership":2.99} evidence: {"rule":"D-OWNER","owner_pac":"9638690837","source_pk":266888,"type_owner":"O","enrollment_id":"O20250303002973","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2.99,"enrollment_organization_name":"ALIYA OF PALATINE LLC"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
org · 1811752413 JSON
| Metric | Value | Asserted | Source |
|---|---|---|---|
| enumeration_date | 2024-02-14 | 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 | ALIYA OF PALATINE 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 | IL | 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 1811752413: 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=…