CMS WatchAugust 18, 2026·5 min read

FY 2027 IPPS Table 6A-6K is posted. Download it before October 1

CMS posted the FY 2027 IPPS Tables 6A-6K zip (new, invalid, and revised codes plus the CC and MCC lists). FY 2027 discharges start October 1, 2026. These files are MS-DRG severity tables, not CMS-HCC V28 mappings.

FY2027IPPSTable 6ICD-10-CMCMS Watch

By the HCC Buddy Coding Team

Published August 18, 2026

A coder desk with folders and a printed packet, standing in for the FY 2027 IPPS Table 6 files before October 1. — CMS posted the FY 2027 IPPS Tables 6A-6K zip on the final-rule home page. FY 2027 discharges start October 1, 2026. — Image: HCC Buddy

Key Takeaways

→CMS's FY 2027 IPPS Final Rule Home Page hosts the Tables 6A-6K zip for CMS-1849-F, including Table 6A new diagnosis codes, Table 6C invalid diagnosis codes, Table 6E revised diagnosis titles, and Table 6J.2 deletions to the CC list.
→CMS-1849-F published in the Federal Register on August 4, 2026 as 91 FR 49570. The Federal Register dates line says these regulations are effective on October 1, 2026.
→The desk download path is fy2027-ipps-fr-tables-6a-6k.zip (server filename cms-1849-f-tables-6a-6k.zip) on the FY 2027 IPPS final-rule home page.
→Tables 6I, 6J, and 6J.2 are IPPS MCC and CC lists used in MS-DRG grouping. They are not CMS-HCC V28 mappings and they do not set a RAF.
→CMS says Table 15 is not posted yet and Table 16B will be available in the fall of 2026. Those files are not the October 1 code-and-severity packet.

The FY 2027 IPPS tables are on CMS's FY 2027 IPPS Final Rule Home Page, including the Tables 6A-6K zip you want before October 1, 2026. CMS-1849-F published in the Federal Register on August 4, 2026 as 91 FR 49570. The Federal Register dates line says these regulations are effective on October 1, 2026.

If you group inpatient stays, this is the file you want. It is not a CMS-HCC model update.

Where the Tables 6A-6K zip lives

CMS lists CMS-1849-F with Date of Display July 31, 2026 and Date of Publication August 4, 2026. Under FY 2027 Final Rule Tables, item 5 is Tables 6A-6K (ZIP). Download fy2027-ipps-fr-tables-6a-6k.zip. The server filename is cms-1849-f-tables-6a-6k.zip.

The page showed Page Last Modified: 08/07/2026 10:16 AM on August 18, 2026. CMS's July 31, 2026 fact sheet points to Federal Register document 2026-15833.

What is in the zip

The zip downloaded on August 18, 2026 had one Excel workbook and the text files CMS listed for Tables 6A through 6K. The workbook is CMS-1849-F Tables 6A-6J.2 v440.xlsx, with sheets 6A through 6J.2.

CMS's page lists Table 6H.2 with the Excel-and-text set. In the zip that opened, 6H.2 is a sheet in that workbook. There was no standalone Table 6H.2 .txt file next to Table 6H.1.

File in the zip	CMS title
CMS-1849-F Table 6A - New Diagnosis Codes - FY 2027.txt	Table 6A-New Diagnosis Codes
CMS-1849-F Table 6B - New Procedure Codes - FY 2027.txt	Table 6B-New Procedure Codes
CMS-1849-F Table 6C - Invalid Diagnosis Codes - FY 2027.txt	Table 6C-Invalid Diagnosis Codes
CMS-1849-F Table 6D - Invalid Procedure Codes - FY 2027.txt	Table 6D-Invalid Procedure Codes
CMS-1849-F Table 6E - Revised Diagnosis Code Titles - FY 2027.txt	Table 6E-Revised Diagnosis Code Titles
CMS-1849-F Table 6F - Revised Procedure Code Titles - FY 2027.txt	Table 6F-Revised Procedure Code Titles
CMS-1849-F Table 6G.1 - Secondary Diagnosis Order Additions to the CC Exclusions List - FY 2027.txt	Table 6G.1-Secondary Diagnosis Order Additions to the CC Exclusions List
CMS-1849-F Table 6G.2 - Principal Diagnosis Order Additions to the CC Exclusions List - FY 2027.txt	Table 6G.2-Principal Diagnosis Order Additions to the CC Exclusions List
CMS-1849-F Table 6H.1 - Secondary Diagnosis Order Deletions to the CC Exclusions List - FY 2027.txt	Table 6H.1-Secondary Diagnosis Order Deletions to the CC Exclusions List
CMS-1849-F Table 6I - Complete MCC List - FY 2027.txt	Table 6I-Complete MCC List
CMS-1849-F Table 6I.1 - Additions to the MCC List - FY 2027.txt	Table 6I.1-Additions to the MCC List
CMS-1849-F Table 6J - Complete CC List - FY 2027.txt	Table 6J-Complete CC List
CMS-1849-F Table 6J.1 - Additions to the CC List - FY 2027.txt	Table 6J.1-Additions to the CC List
CMS-1849-F Table 6J.2 - Deletions to the CC List - FY 2027.txt	Table 6J.2-Deletions to the CC List
CMS-1849-F Table 6K - Complete List of CC Exclusions - FY 2027.txt	Table 6K-Complete List of CC Exclusions (text file only)

New, invalid, and revised codes (Tables 6A through 6F)

6A, 6C, and 6E are diagnosis: new codes, invalid codes, revised titles. 6B, 6D, and 6F are the same three files for procedures.

These are the IPPS tables used for FY 2027 MS-DRG grouping. They do not replace the CDC/NCHS FY 2027 ICD-10-CM code changes. Use Table 6A when the question is how a new diagnosis sits in the FY 2027 grouper (CC flag, MDC, MS-DRG). Use the addenda when the question is whether the code exists in the classification.

After you have the table open, look the code up in the encoder if you need the current tabular note.

CC, MCC, and exclusion lists (Tables 6G through 6K)

Table	What it is for
6I	Complete MCC list
6I.1	Additions to the MCC list
6J	Complete CC list
6J.1	Additions to the CC list
6J.2	Deletions to the CC list
6G.1 / 6G.2	Additions to the CC exclusions list (secondary-diagnosis order and principal-diagnosis order)
6H.1 / 6H.2	Deletions to the CC exclusions list (secondary-diagnosis order and principal-diagnosis order)
6K	Complete list of CC exclusions

Table 6K's own header says it lists codes defined as a CC or MCC when used as a secondary diagnosis, and that a table number groups the principal diagnoses that make that CC or MCC count as a non-CC.

Table 6J.2 is the CC-deletion list. Load it when a diagnosis drops off the CC list for FY 2027 grouping. A separate note covers one CC-to-NonCC policy in this rule. That note is not this file list, and Table 6J.2 is not limited to that one policy.

If last year's CC and MCC flags are still on your cheat-sheet, replace them from 6I, 6J, 6I.1, 6J.1, and 6J.2 before the first October 1 discharge.

This is MS-DRG severity, not CMS-HCC V28

An IPPS CC or MCC flag decides whether a secondary diagnosis moves an inpatient stay into a with-CC or with-MCC MS-DRG. It does not assign a CMS-HCC, and it does not set a RAF.

For Medicare Advantage risk-adjustment work, use the CMS-HCC model for the payment year you are coding. Confirm the mapping in ICD-10 to HCC. Do not copy an IPPS CC flag onto a V28 recapture list.

The code book is still the classification. Table 6 tells you how FY 2027 IPPS treats the code as a CC, MCC, or NonCC.

Other FY 2027 files, and what is still missing

Also posted on the same home page if you group or audit inpatient claims:

Table 5 (ZIP): MS-DRGs, relative weighting factors, and geometric and arithmetic mean length of stay.
FY 2027 Table 10 (ZIP): Relevant ICD-10 codes for certain FY 2027 new technology add-on payments.
MAC Implementation File 6 (ZIP): FY 2027 MS-DRG Grouper Changes.

CMS says these are not posted yet:

Table 15: Hospital Readmissions Reduction Program payment adjustment factors. CMS will post it after hospitals review and correct their calculations, for discharges on or after October 1, 2026.
Table 16B: Actual Hospital VBP payment adjustment factors, available in the fall of 2026. Table 16A is posted and is proxy only. CMS says those proxies will not be used to adjust hospital payments.
MAC Implementation Files 1, 2, 5, and 9: will be posted at a later date.

Do not wait on Table 15 to grab Table 6. The code-and-severity packet is already up.

What coders should do now

1Download Tables 6A-6K (ZIP) from the FY 2027 IPPS Final Rule Home Page (fy2027-ipps-fr-tables-6a-6k.zip) and keep the Excel workbook plus the text files.
2Load Table 6A, 6C, and 6E for new, invalid, and revised diagnosis codes, and Table 6B, 6D, and 6F for the matching procedure files, before the first October 1, 2026 discharge.
3Replace last year's CC and MCC cheat-sheet from Table 6I, 6J, 6I.1, 6J.1, and 6J.2. Use Table 6J.2 when a diagnosis drops off the CC list.
4Keep IPPS CC/MCC flags out of CMS-HCC V28 recapture work. Confirm the payment-year mapping in ICD-10 to HCC, not from an IPPS table.
5Do not wait on Table 15 or Table 16B. CMS says Table 15 is not posted yet and Table 16B comes in the fall of 2026.

Frequently Asked Questions

Where do I download the FY 2027 IPPS Table 6 files?

From the CMS FY 2027 IPPS Final Rule Home Page. Under FY 2027 Final Rule Tables, download Tables 6A-6K (ZIP). The file path is fy2027-ipps-fr-tables-6a-6k.zip. The server filename is cms-1849-f-tables-6a-6k.zip.

When do the FY 2027 IPPS tables take effect?

CMS-1849-F published on August 4, 2026 as 91 FR 49570. The Federal Register dates line says these regulations are effective on October 1, 2026, which is the start of FY 2027 IPPS discharges.

What is Table 6J.2 in the FY 2027 IPPS files?

Table 6J.2 is Deletions to the CC List for FY 2027. It is the IPPS file that lists diagnosis codes removed from the complication or comorbidity list used in MS-DRG grouping. It is not a CMS-HCC V28 mapping file.

Do the FY 2027 IPPS Table 6 files change Medicare Advantage HCC mapping?

No. CMS-1849-F is the FY 2027 IPPS and LTCH PPS final rule. Tables 6I, 6J, and 6J.2 are MS-DRG CC and MCC lists. They do not revise the CMS-HCC risk-adjustment model and they do not set a RAF.

Is FY 2027 IPPS Table 15 posted yet?

No. CMS's FY 2027 IPPS Final Rule Home Page says Table 15 is not available at this time. CMS will post the final Hospital Readmissions Reduction Program payment adjustment factors after hospitals review and correct their calculations, for discharges on or after October 1, 2026.