Resources / Calendar

ACO Calendar

Key dates for voluntary alignment, beneficiary notification letters, health data reporting, and MSSP beneficiary notices.

LEAD Calendar ↓ REACH Calendar ↓ MSSP Calendar ↓
Voluntary Alignment

LEAD SVA Submission Calendar

For LEAD (Long-term Enhanced ACO Design) ACOs participating in Hybrid alignment, below are the PY 2027 SVA submission deadlines and effective alignment dates.

Performance YearSubmission Deadline (by 11:59 PM ET)Beneficiaries Effective Alignment Date
PY 2027October 23, 2026*January 1, 2027
PY 2027December 15, 2026February 1, 2027
PY 2027January 15, 2027March 1, 2027
PY 2027February 15, 2027April 1, 2027
PY 2027March 15, 2027May 1, 2027
PY 2027April 15, 2027June 1, 2027
PY 2027May 14, 2027July 1, 2027
PY 2027June 15, 2027August 1, 2027
PY 2027July 15, 2027September 1, 2027
PY 2027August 13, 2027October 1, 2027
PY 2027September 15, 2027November 1, 2027
PY 2027October 15, 2027December 1, 2027

*Beneficiaries aligned via the October 23, 2026 submission will not be included in the Preliminary Benchmark Report, but will be effective January 1, 2027 and included in the December Aggregate Alignment Estimate.

Voluntary Alignment

ACO REACH SVA Calendar

Voluntary Alignment quarters are slightly shifted from calendar quarters — they're tied to CMS submission dates.

26Q1

Submission day is 2/11/26. Quarter runs 10/23/25 to 2/11/26.

26Q2

Submission day is 5/13/26. Quarter runs 2/12/26 to 5/13/26.

26Q3

Submission day is 8/12/26. Quarter runs 5/14/26 to 8/12/26.

26Q4

Submission day is 10/23/26. Quarter runs 8/13/26 to 10/23/26 (a shorter window that varies year to year).

WeekKey Activities26Q126Q226Q326Q4
0Start of New SVA Quarter10/23/252/12/265/14/268/13/26
2–4Patient Lists Due for SVA Campaigns12/19/253/11/266/10/269/1/26
5–6SVA Campaigns Launch12/27/253/17/266/18/269/8/26
8Upload 4i Files (BAR, Provider Alignment Report, SVA Response File, ACO Participants List)1/31/264/30/267/31/2610/31/26
11"SVAs Awaiting Information" Due to Mabel + Last Call for In-Clinic Forms2/7/265/9/268/8/2610/19/26
12CMS Submission Day2/11/265/13/268/12/2610/23/26
—Alignment Effective Date4/1/267/1/2610/1/261/1/27
Notifications

Beneficiary Notification Letter (BNL) Calendar

Q1 & Q2 Aligned Members

  • CMS deadline: May 30
  • Emails sent: May 4
  • Letters mailed: May 11 (in-home ~May 21)

Q3 Aligned Members

  • CMS deadline: Sept 30
  • Emails sent: Aug 11
  • Letters mailed: Aug 18 (in-home ~Aug 28)

Q4 Aligned Members

  • CMS deadline: Nov 28
  • Emails sent: Nov 6
  • Letters mailed: Nov 13 (in-home ~Nov 23)

Managing undelivered mail

For step-by-step instructions on resolving undeliverable BNLs, see our BNL guide.

Upstream Drivers of Health

SDoH Calendar

January

  • PY26 in-clinic surveys distributed
  • PY25 SDoH processing continues

February

  • Mid-Feb: Mabel creates preliminary SDoH target list based on Jan BAR file
  • Feb 20: Last call for PY25 SDoH exports / in-clinic surveys
  • Late-Feb: PY25 SDoH QC

March

  • Early March: Mabel shares PY25 SDoH submission template
  • Early March: preliminary PY26 SDoH target list based on Jan BAR file
  • Early March: PY26 SDoH Dashboard available
  • March 13: PY25 SDoH submission deadline

April–October

  • Mabel processes PY26 SDoH in-clinic surveys and exports
  • (Optional) email campaigns launch

November

  • Early Nov: updated PY26 SDoH target list based on Oct BAR file
  • Early Nov: SDoH email campaigns launch
  • Mid-Nov: SDoH mail campaigns launch

December–March

  • Mabel processes incoming SDoH responses (see January–March for QC and submission deadline)
MSSP

MSSP Beneficiary Information Notices (BINs)

Initial and follow-up notices sent to newly aligned members each quarter.

QuarterACO-MS Files AvailableInitial NoticeFollow-Up Notice
Q0December–FebruaryASAP after files available~45 days following initial notice
Q1MayASAP after files available~45 days following initial notice
Q2AugustASAP after files available~45 days following initial notice
Q3NovemberASAP after files available~45 days following initial notice

If you have any questions, please reach out to your account manager or support@getmabel.com.

Questions about a deadline?

Your account manager or our support team can help.

Contact Support

support@getmabel.com · Mon–Fri, 8am–6pm PT