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 | 1083895627 | nppes_providers | deterministic_pk | 1.000 | 2026-06-10 | evidencerecorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1083895627","entity_type_code":"2"} |
| pecos_enrlmt_id | O20220217000877 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1083895627","rule":"D-PECOS","enrlmt_id":"O20220217000877"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| ← owns | MARISSA GOLDBERG | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/01/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0244619401","source_pk":218159,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | TRACEA R SARALIEV | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"02/08/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0446784458","source_pk":218161,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | MELANIE CATHERINE BATISTE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/21/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0749673606","source_pk":218163,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | VIDHYASHANKARAN MAHALINGAMSHIVARAMAN | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"04/12/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0749682003","source_pk":218165,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | ANDREW MICHAEL PRATT | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/20/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1153857107","source_pk":218168,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | J RICHARD ATWOOD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"04/25/2005","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"1254412505","source_pk":218170,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | ANNA MARIA LEONARD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"02/01/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"1355861972","source_pk":218172,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | DEBORAH MEDRANO | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"12/13/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"1557881273","source_pk":218174,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | CHARLOTTE A WEAVER | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/10/2016","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"1658421300","source_pk":218176,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | CINDY VAZQUEZ | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/01/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2062948011","source_pk":218178,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | GUDARS M RAHNEMA | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"10/02/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"2264790476","source_pk":218180,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | REGINE JEANNE SYDA-LAWTON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"12/13/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"2567982283","source_pk":218182,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PIH HEALTH WHITTIER HOSPITAL (CA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"01/01/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3678545308","source_pk":218184,"type_owner":"O","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | SUSANNE R PONCE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"05/04/1983","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3870723125","source_pk":218186,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | SHELLY L NECKE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"12/01/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3870934771","source_pk":218188,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | MOEZ KHORSANDI (CA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"03/22/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"4183516396","source_pk":218190,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | HAMILTON J HAMAR | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/10/2016","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"4183996507","source_pk":218192,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PIH HEALTH GOOD SAMARITAN HOSPITAL (CA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"34","association_date":"01/01/2020","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"4880887884","source_pk":218194,"type_owner":"O","enrollment_id":"O20220217000877","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":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | WILLIAM HAROLD ROTH | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"03/01/2023","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"5890144984","source_pk":218197,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PETER P GREANEY | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"11/13/2018","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"6507835394","source_pk":218199,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | KPMG LLP (AZ) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"06/01/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6709306426","source_pk":218201,"type_owner":"O","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | NOEL PATRICK COPPINGER | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"01/01/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6800220252","source_pk":218203,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | SCOTT SOUTHRON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"12/13/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"6800316522","source_pk":218205,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PATRICK L MONROE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/10/2016","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"6901178326","source_pk":218207,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | SCOTT KROG | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"12/13/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"7012437734","source_pk":218209,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | JAMES R WEST | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"01/01/2020","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"7719940634","source_pk":218211,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PIH HEALTH INC (CA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"01/01/2020","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"8325275068","source_pk":218215,"type_owner":"O","enrollment_id":"O20220217000877","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | KENTON C WOODS | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"02/28/2005","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"8426139783","source_pk":218216,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | PAUL A TREINEN | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"11/12/2019","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"8820416860","source_pk":218218,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | THURSO BARENDSE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"02/08/2024","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"9537693544","source_pk":218220,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
| ← owns | ALEX F ALVAREZ | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"41","association_date":"10/09/2017","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"9830429307","source_pk":218222,"type_owner":"I","enrollment_id":"O20220217000877","role_code_owner":"41","role_text_owner":"CORPORATE DIRECTOR","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"PIH HEALTH GOOD SAMARITAN HOSPITAL"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
org · 1083895627 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 | 2007-11-26 | 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 | PIH HEALTH GOOD SAMARITAN HOSPITAL | 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 |
| parent_org_lbn | PIH HEALTH INC | 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 | CA | 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 1083895627: 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=…