October Medicare and Medi-Cal claims updates: reconcile completed implementation
Oct 11, 2026 edition · GC-2026-0012 · Published 2026-10-11 · Version 3 · Final
October payment and coding updates require several distinct date and adjustment rules. Current EDI, SNF therapy-file placement, home-health grouping, and laboratory edits must be reconciled with the specific automatic Q5161 adjustment and Medi-Cal receipt-versus-service triggers.
What happened
The current EDI instruction is September 28 R13977, replacing R13967 to update the 276/277 attachment while retaining October 1 effectiveness and October 5 implementation. Other October releases use distinct triggers. MPFS R13929 amends 2026 payment files, with January 1 general effectiveness and individual-record dates. CLFS/CLIA uses CR 14569 and MM14569, effective October 1 and implemented October 5. SNF MM14561 removes specified therapy codes from Part B File 1 while retaining them in File 4, with October 5 placement dates in Table 8. Home-health R13793 requires grouper 07.2.26 for claim From dates on or after October 1 for bill type 032x except 32A and 320. These contractor milestones require release verification rather than an assumption that every local system installed the files.
Adjustment instructions also differ. SNF, MPFS, and CLFS sources describe adjusting affected claims brought to the MAC's attention without a general file search, whereas OPPS R13978 specifically requires Q5161 claims received July 1 through July 20 to be adjusted within 30 days of implementation. OPPS coding/payment changes do not themselves establish Medicare coverage. DMEPOS MM14619 separates October code and fee changes from January 2028 CGM/pump bundling and its patient-owned-equipment transition. Medi-Cal NCCI edits use claims received from October 1; Q4 HCPCS changes generally use service dates from October 1 unless specified otherwise. Reconciliation must therefore preserve each source's claim population, retroactive dates, and exception rather than applying one October deadline or reopening rule to every claim.
Scope and timing
- Authority status
- Final
- Applicability
- Directly applicable
- Audience
- Health systems, Provider networks
- Jurisdiction
- Federal, California
- Affected functions
- Revenue Cycle, IT, Coding, Finance
- Responsible owner
- Revenue Cycle
- Recorded date
- 2026-10-05
- Date type
- implementation
Why it matters
A contractor implementation date is not a provider filing deadline or proof that a vendor applied the release. Medi-Cal NCCI edits turn on claims received from October 1; Q4 HCPCS changes generally turn on dates of service from October 1. Coding and payment changes do not establish coverage, and retroactive corrections retain their separate dates.
Recommended action
Revenue Cycle and IT should obtain actual release evidence for current R13977 EDI, CR14588 MPFS, CR14569 CLFS/CLIA, CR14561 SNF, and home-health grouper 07.2.26 updates, distinguishing each effective trigger from October 5 contractor implementation. Reconcile applicable claims and use MM14561 to verify therapy-code placement. Bring affected SNF, MPFS, and CLFS claims to the MAC as instructed; preserve the separate mandatory Q5161 adjustment for claims received July 1 through July 20. Apply each Medi-Cal receipt-date or service-date rule correctly. The previously reported Noridian October 2–4 downtime window has elapsed; current restoration or ongoing outage remains unverified. January 2027 releases and January 2028 DMEPOS policy remain separate.
Sources
- Rescinded EDI transmittal R13934OTN: replacement is R13967OTNOfficial · Centers for Medicare & Medicaid Services · 2026-08-27 · Source review 2026-10-11
- Transmittal R13929CP, change request 14588, quarterly update to the Medicare Physician Fee Schedule Database, October 2026Official · Centers for Medicare & Medicaid Services · 2026-08-27 · Source review 2026-10-11
- MLN Connects newsletter, August 27, 2026Official · Centers for Medicare & Medicaid Services · 2026-08-27 · Source review 2026-10-11
- MLN Connects, September 3, 2026Official · CMS · 2026-09-03 · Source review 2026-10-11
- MM14561, SNF consolidated billing October updateOfficial · CMS · 2026-09-02 · Source review 2026-10-11
- NCCI quarterly update effective October 1Official · DHCS · 2026-08-31 · Source review 2026-10-11
- Portal, IVR and customer-service limited availability October 2-4Official · Noridian, Jurisdiction E · 2026-09-01 · Source review 2026-09-06
- CMS Transmittal R13978CPOfficial · Centers for Medicare & Medicaid Services · 2026-09-29 · Source review 2026-10-11
- CMS Transmittal R13979CPOfficial · Centers for Medicare & Medicaid Services · 2026-09-29 · Source review 2026-10-11
- CMS Transmittal R13956CPOfficial · Centers for Medicare & Medicaid Services · 2026-09-29 · Source review 2026-10-11
- 2026 HCPCS Quarter 4 UpdateOfficial · DHCS · 2026-09-29 · Source review 2026-10-11
- MM14619, DMEPOS Fee Schedule October 2026 Quarterly UpdateOfficial · CMS · 2026-09-30 · Source review 2026-10-11
- MM14589, Hospital OPPS October 2026 UpdateOfficial · CMS · 2026-10-01 · Source review 2026-10-11
- Transmittal 13791, CR 14492, CARC/RARC and remittance software updateOfficial · CMS · 2026-05-27 · Source review 2026-10-11
- Replacement EDI transmittal R13967OTN, CR 14429Official · CMS · 2026-09-18 · Source review 2026-10-11
- Current EDI replacement transmittal R13977OTN, CR14429Official · CMS · 2026-09-28 · Source review 2026-10-11
- CMS R13929CP, CR14588, actual official PDF instructionOfficial · CMS · 2026-08-27 · Source review 2026-10-14
- CMS R13793CP, CR14509, home-health grouper instructionOfficial · CMS · 2026-07-08 · Source review 2026-10-14
- CMS MM14569, October CLFS and CLIA updateOfficial · CMS · 2026-08-25 · Source review 2026-10-14
Complete edition and supplemental material
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