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 | 1972041952 | nppes_providers | deterministic_pk | 1.000 | 2026-06-10 | evidencerecorded: 2026-06-10 methodology: entity-graph/v1 evidence: {"rule":"D-NPI","source_pk":"1972041952","entity_type_code":"2"} |
| pac_id | 3173870094 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1972041952","rule":"D-PECOS","enrlmt_id":"O20180724002999","pecos_asct_cntl_id":"3173870094"} |
| pecos_enrlmt_id | O20180724002999 | pecos_providers | exact_npi_in_pecos | 1.000 | 2026-06-16 | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 evidence: {"npi":"1972041952","rule":"D-PECOS","enrlmt_id":"O20180724002999"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| ← owns | POKY FEEDERS INC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":4.93} evidence: {"rule":"D-OWNER","owner_pac":"0042487142","source_pk":181316,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.93,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | STEVEN M HOWARD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":9.82} evidence: {"rule":"D-OWNER","owner_pac":"0648351148","source_pk":181317,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":9.82,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | VINCENT TAEGER (IA) | 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":"0941109359","source_pk":181318,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 0941795181 (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"05/15/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0941795181","source_pk":181320,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | ABERNATHY FAMILY FARMS LLC (IA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"11/01/2018","percentage_ownership":9.87} evidence: {"rule":"D-OWNER","owner_pac":"2567710783","source_pk":181321,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":9.87,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 2567957715 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"11/01/2018","percentage_ownership":0.99} evidence: {"rule":"D-OWNER","owner_pac":"2567957715","source_pk":181322,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.99,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | WAYNE C ANDERSON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":5.41} evidence: {"rule":"D-OWNER","owner_pac":"3173431707","source_pk":181323,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":5.41,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | PIVOTAL HEALTH CARE LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2018","percentage_ownership":75} evidence: {"rule":"D-OWNER","owner_pac":"3375718075","source_pk":181324,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":75,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 3476048620 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"11/01/2018","percentage_ownership":0.99} evidence: {"rule":"D-OWNER","owner_pac":"3476048620","source_pk":181326,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.99,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | SCOTT E GULLEDGE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"3870402357","source_pk":181327,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | SCENIC HOLDINGS LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"01/01/2024","percentage_ownership":61.12} evidence: {"rule":"D-OWNER","owner_pac":"4082951249","source_pk":181330,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":61.12,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | MERCY MEDICAL CENTER (IA) | 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":"4183535271","source_pk":181331,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | CADET INVESTMENT LLC (IA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":9.5} evidence: {"rule":"D-OWNER","owner_pac":"4284809989","source_pk":181332,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":9.5,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 4587159736 (IA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/12/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4587159736","source_pk":181333,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 4880189034 | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"4880189034","source_pk":181334,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | 5 R CATTLE, LLC (CO) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":4.93} evidence: {"rule":"D-OWNER","owner_pac":"5698287092","source_pk":181335,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.93,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | MARLENE A ANDERSON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":5.41} evidence: {"rule":"D-OWNER","owner_pac":"5991613523","source_pk":181336,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":5.41,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | WSG LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":15.84} evidence: {"rule":"D-OWNER","owner_pac":"5991972002","source_pk":181337,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":15.84,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | POKY - 5R LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"01/01/2024","percentage_ownership":9.85} evidence: {"rule":"D-OWNER","owner_pac":"6002081700","source_pk":181338,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":9.85,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | MOUW FAMILY INVESTMENTS, LLC (IA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"11/01/2018","percentage_ownership":4.93} evidence: {"rule":"D-OWNER","owner_pac":"6406341643","source_pk":181339,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.93,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | LMRAY, LLC (CO) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"11/01/2018","percentage_ownership":4.93} evidence: {"rule":"D-OWNER","owner_pac":"6507378908","source_pk":181340,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.93,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | GILBERT R WOOD | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6800704438","source_pk":181341,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | TRAVIS S GULLEDGE | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"01/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"6901338334","source_pk":181343,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 7214422450 (IL) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"85","association_date":"11/01/2018","percentage_ownership":0.99} evidence: {"rule":"D-OWNER","owner_pac":"7214422450","source_pk":181346,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"85","role_text_owner":"DIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0.99,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | SUMMIT CARE, LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"11/01/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7315073954","source_pk":181347,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | 3RK, LLC (CO) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"86","association_date":"01/01/2024","percentage_ownership":4.92} evidence: {"rule":"D-OWNER","owner_pac":"7315459716","source_pk":181348,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"86","role_text_owner":"INDIRECT OWNERSHIP INTEREST","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":4.92,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | JORDAN R ANDERSON | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"01/01/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7618358771","source_pk":181349,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | SCENIC DEVELOPMENT LLC (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"11/01/2018","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"7810162518","source_pk":181351,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 8123513363 (KS) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"05/27/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"8123513363","source_pk":181353,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | STEPHEN TRESSEL | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"43","association_date":"06/03/2019","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"8325329626","source_pk":181354,"type_owner":"I","enrollment_id":"O20180724002999","role_code_owner":"43","role_text_owner":"OPERATIONAL/MANAGERIAL CONTROL","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
| ← owns | OWNER PAC 9032604277 (IA) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"72","association_date":"05/15/2025","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"9032604277","source_pk":181356,"type_owner":"O","enrollment_id":"O20180724002999","role_code_owner":"72","role_text_owner":"ADP OF THE SNF","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"CCRC OF CEDAR RAPIDS, LLC"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
org · 1972041952 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 | 2017-02-09 | 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 | CCRC OF CEDAR RAPIDS, 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 | KS | 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 1972041952: 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=…