Electronic Visit Verification (EVV) in Connecticut
All states: EVV requirements map
In short: Open model. Agencies use the state's Sandata system or a certified alternate vendor. Claims are denied without a confirmed visit.
Connecticut EVV at a glance
| EVV model | Open (the state calls it Open Vendor EVV). Agencies use the state system or their own certified EVV software. |
|---|---|
| State EVV system | Sandata Agency Management (also called Santrax), offered by DSS. |
| Aggregator | Sandata Aggregator, which loads visits into the state's Medicaid claims system (MMIS). |
| Can I use my own EVV vendor? | Yes. The vendor must complete testing and certification with Sandata first. |
| Are claims denied without EVV? | Yes. Home health for dates of service from July 1, 2024. Waiver personal care checks are older. |
| One system or two? | One. An agency keeps its visit data in the state system or in one alternate system, not both. |
| Self-directed staff | Outside this model. Participant-hired staff log time in the GT Independence app. |
Last verified against state sources: 2026-10-08.
How does EVV work in Connecticut?
Connecticut uses an open EVV model, which the Department of Social Services (DSS) calls Open Vendor EVV. An agency can use the state-provided system, Sandata Agency Management (also called Santrax), or choose its own Alternate EVV system. Either way, visits flow through the Sandata Aggregator and are loaded into the state's Medicaid claims system, where they are matched to claims.
The open model arrived in two steps. Home health moved first, with the state accepting home health visit data from either option starting March 23, 2023. Agency personal care and related waiver services followed on May 8, 2024, when DSS began accepting personal care visit data from Alternate EVV systems. Before that, Connecticut required every agency to use the state's vendor.
For home care, the open model covers agency-delivered services such as personal care, homemaker and companion under the Connecticut Home Care Program for Elders and the Personal Care Assistance, Acquired Brain Injury, Autism and Mental Health waivers. The state's EVV Service Code Listing is the place to check whether a specific code is EVV mandated or EVV optional.
- Self-directed staff are separate. Workers hired directly by a participant do not use this model. Since March 24, 2024 they enter their time in the GT Independence app, and there is no alternate vendor choice for that group.
- Developmental services run on a separate track. The Department of Developmental Services (DDS) has its own open model and its own Sandata specification, so a vendor certified for DSS programs is not automatically set up for DDS.
Does Connecticut deny Medicaid claims without a confirmed EVV visit?
Yes. For an EVV mandated service, the claim needs a matching confirmed visit in the state's claims system. When there is none, or when the claim bills more units than the confirmed visit supports, the claim denies. Agencies should also wait 48 hours after a visit is confirmed before billing, so the visit has time to load.
The denial codes on the remittance tell you which check failed:
- EOB 3327: confirmed visit not found (waiver claims).
- EOB 3328: confirmed visit units are exceeded (waiver claims).
- EOB 3331 and 3332: the matching checks for non-waiver home health claims.
The dates differ by service type:
- Home health: denials apply to dates of service from July 1, 2024. The state first announced January 1, 2024, then postponed the start more than once before settling on July 1.
- All four checks: DSS paused them in the fall of 2024 and returned them to denied status on November 15, 2024, for dates of service from July 1, 2024 forward.
- Waiver personal care: confirmed visit checks on these claims were in place before 2024. We did not find a published start date.
The state's home health guidance also says EVV visits are not required for payment of crossover claims.
Important: These claim checks apply to DSS and Mental Health waiver programs billed through the state's Medicaid claims system. We did not find a DDS source that says payment is denied when an EVV visit is missing. If you are a DDS qualified provider, check with DDS on how a missing visit affects payment.
Can a Connecticut agency use its own EVV software?
Yes. Connecticut lets an agency use a third-party Alternate EVV system instead of the state system. The vendor has to complete testing and certification with Sandata before the agency receives production credentials, and the agency has to complete Sandata Aggregator training.
A few rules shape that choice:
- One system only. An agency keeps all of its personal care visit data in either Sandata Agency Management or one Alternate EVV system. A mix of the two is not supported. The same rule applies to home health data.
- Each provider ID is registered separately. An agency with more than one provider ID (the state calls it an AVRS ID) registers each one.
- Tasks travel with the visit. The state's vendor specification requires the tasks performed to be sent along with the visit.
- There is no official vendor list. DSS says it does not publish a list of approved Alternate EVV vendors, because any vendor can certify with Sandata. Ask a vendor directly whether it has completed Connecticut certification for your program.
Agencies that stay on the state system have their own steps. They complete the required online training to receive their Welcome Kit, give Sandata the provider ID for each waiver they serve, and keep the rates in the system in line with the fee schedule. For example, DSS told agencies that bill from the state system to update their rates before billing dates of service from January 1, 2026, when a 4.9 percent rate increase took effect.
What is changing next for Connecticut EVV?
We did not find any upcoming EVV change in DSS postings as of our last check on October 8, 2026. The open model, the Sandata Aggregator and the claim checks described above are the current rules. We also found no upcoming change on the DDS EVV pages.
The most recent EVV notices were about past events, not new rules:
- A notice posted January 7, 2026 on the reprocessing of claims that had denied.
- A new Sandata Customer Support Portal, as of April 20, 2026.
- A backlog of Alternate EVV files from April 20 to April 22, 2026, which left some visits missing from the aggregator for a time.
State messages in 2026 describe Sandata as now part of HHAeXchange. We did not find any announcement that this changes Connecticut's aggregator or the way Alternate EVV systems connect to it. The practical lesson from the 2026 notices is to check that visits have reached the aggregator before you bill, and to keep an eye on the state's provider messages.
Get notified when Connecticut EVV rules change
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Connecticut EVV sources
- Connecticut DSS Provider Bulletin 2024-15: Open Vendor EVV model for personal care services
- Connecticut Medical Assistance Program: Important Message on Alternate EVV for personal care services (May 31, 2024)
- Connecticut Medical Assistance Program: Personal care services Open Vendor EVV implementation
- Connecticut Medical Assistance Program: Personal care services Open Vendor EVV FAQ
- Connecticut Medical Assistance Program: Important Message on EVV claim denials (November 7, 2024)
- Connecticut Medical Assistance Program: Important Message on home health Open Vendor EVV (June 29, 2023)
- Connecticut Medical Assistance Program: EVV Service Code Listing
- Connecticut Medical Assistance Program: Messages Archive
- Connecticut DSS PCA Workforce Council: important announcements
Related reading
- EVV Software Compatible with Sandata Aggregator
- EVV Aggregators Explained: A Simple Guide for Home Care Providers
- The Benefits of Using 3rd-Party EVV Software
- EVV Software Demo Checklist: What to Ask and Test Before You Buy
- What is EVV Software?
- EVV requirements for every state (map)
Other states that use Sandata
California, Colorado, Delaware, District of Columbia, Hawaii, Idaho, Indiana, Maine, Massachusetts, Missouri, Nevada, North Carolina, Ohio, Pennsylvania, Rhode Island, Vermont, Wisconsin. See every state on the EVV requirements map.
Page history
- October 8, 2026: Page rewritten and checked against state sources.
This page is a reference, not legal advice. State rules change, so confirm details with the state before you act on them.
Ankota provides EVV software for Medicaid home care agencies. If you would like to talk through Connecticut's requirements, contact Ankota or read more about Ankota's EVV software.
Ms. Kate McEvoy
Connecticut Department of Social Services
Director of Division of Health Services
55 Farmington Avenue
Hartford, CT 06105