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 | 1437702396 | nppes_providers | deterministic_pk | 1.000 | 2026-06-10 | evidencerecorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1437702396","entity_type_code":"2"} |
| pac_id | 8325370901 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1437702396","rule":"D-PECOS","enrlmt_id":"O20191031001258","pecos_asct_cntl_id":"8325370901"} |
| pecos_enrlmt_id | O20191031001258 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1437702396","rule":"D-PECOS","enrlmt_id":"O20191031001258"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| ← owns | OWNER PAC 0345726816 (NY) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":1.5} evidence: {"rule":"D-OWNER","owner_pac":"0345726816","source_pk":195334,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":1.5,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | PHILLIP MCAFEE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"03/22/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0941786420","source_pk":195335,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | BARRY DONATH | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"06/07/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1052797990","source_pk":195337,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 1052897527 (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"08/19/2019","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1052897527","source_pk":195340,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | ENSH CONSULTING LLC (NY) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":46.76} evidence: {"rule":"D-OWNER","owner_pac":"1456683663","source_pk":195341,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":46.76,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | YYES OP LLC (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"08/19/2019","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"1557693769","source_pk":195343,"type_owner":"O","enrollment_id":"O20191031001258","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":"CARTERSVILLE NURSING LLC"} |
| ← owns | GLADYS SONE-EBELOUE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/24/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1759511330","source_pk":195345,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 2163908633 (OR) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"12/31/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2163908633","source_pk":195347,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | ANTHONY KARANJA | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/03/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2668958141","source_pk":195348,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | STARLIGHT HEALTHCARE LLC (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":17} evidence: {"rule":"D-OWNER","owner_pac":"3577856012","source_pk":195350,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":17,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | MICHAEL BERKOWITZ | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":8.66} evidence: {"rule":"D-OWNER","owner_pac":"3678829744","source_pk":195352,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":8.66,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | YW GEORGIA 4 LLC (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":18} evidence: {"rule":"D-OWNER","owner_pac":"4082946298","source_pk":195354,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":18,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | GGI EQUITIES LLC (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"08/19/2019","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4183956394","source_pk":195356,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | STEPHANIE GREEN | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"06/03/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"5395221873","source_pk":195358,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | LE ANTHONY HARDY (GA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"08/19/2019","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"5395722185","source_pk":195360,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | TERESA WAGENAAR | 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":"5597241075","source_pk":195362,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 6204312788 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"04/01/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6204312788","source_pk":195364,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | SARAH HORTON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/01/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6406332980","source_pk":195365,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | SHLOMO E HELLER | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":23.38} evidence: {"rule":"D-OWNER","owner_pac":"6709121213","source_pk":195367,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":23.38,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 6800372376 (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":2} evidence: {"rule":"D-OWNER","owner_pac":"6800372376","source_pk":195369,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 7113403692 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":2.5} evidence: {"rule":"D-OWNER","owner_pac":"7113403692","source_pk":195370,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2.5,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | EPHRAIM NUSSBAUM | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":23.38} evidence: {"rule":"D-OWNER","owner_pac":"7517202021","source_pk":195371,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":23.38,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | RENEE ELLIS | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/21/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7517243819","source_pk":195375,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | JASON BLALOCK | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"08/22/2024","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7618169335","source_pk":195377,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | EMPIRE CARE CENTERS LLC (NY) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"08/19/2019","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7618209826","source_pk":195379,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | ARYEH L SWERDLOFF | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"03/20/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7911383971","source_pk":195381,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 8022594506 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":2} evidence: {"rule":"D-OWNER","owner_pac":"8022594506","source_pk":195383,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":2,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | DEBRA HARWELL | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"05/09/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"8426967480","source_pk":195384,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 8527544097 (NJ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":3.58} evidence: {"rule":"D-OWNER","owner_pac":"8527544097","source_pk":195386,"type_owner":"O","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":3.58,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | LINDA SPIVEY | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"12/11/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"9032695515","source_pk":195387,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | YEHUDA WOLMARK | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"35","association_date":"08/19/2019","percentage_ownership":18} evidence: {"rule":"D-OWNER","owner_pac":"9638412380","source_pk":195389,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"35","role_text_owner":"5% OR GREATER INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":18,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
| ← owns | OWNER PAC 9931685419 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"08/19/2019","percentage_ownership":3.58} evidence: {"rule":"D-OWNER","owner_pac":"9931685419","source_pk":195391,"type_owner":"I","enrollment_id":"O20191031001258","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":3.58,"enrollment_organization_name":"CARTERSVILLE NURSING LLC"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
org · 1437702396 JSON
| Metric | Value | Asserted | Source |
|---|---|---|---|
| enumeration_date | 2019-07-19 | 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 | CARTERSVILLE NURSING 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 | GA | 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 1437702396: 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=…