Intro to the DD Services System

1. Overview and objectives

Before you can run an agency in this system, you need a working picture of the system itself. Virginia's developmental disability (DD) waiver services are a federally funded, state-administered set of supports that lets people with intellectual and developmental disabilities live in the community rather than in institutional settings. The system has a particular shape: federal authority at the top (CMS), state administration in the middle (DBHDS and DMAS), and a network of providers, support coordinators, and individuals at the delivery end. This module gives you that map.

By the end you will be able to:

1. Explain what HCBS (Home and Community-Based Services) means and why the system exists in this form.
2. Contrast community-based services with institutional care, and explain the federal and state policy direction toward the former.
3. Describe who the Virginia DD waiver system serves at a high level (the eligibility frame, not the regulation in detail).
4. Explain the slot-and-waitlist concept and why a person can be eligible but not yet receiving services.
5. Identify the Supports Intensity Scale (SIS) as the standardized needs assessment, and describe its purpose without getting into scoring mechanics.
6. Locate yourself, as a provider, in the larger system, and recognize whose decisions affect what you do.

2. Why this matters

The most common mistake a new provider makes is operating tactically without ever understanding the strategic picture. They learn one form, one process, one help desk, but they never see how the pieces connect. The result is a brittle organization that gets blindsided when policy moves, when a regulation is updated, or when a person they support is affected by a system-level decision.

You don't need to be a policy wonk. You do need to understand that you are part of a system that has its own logic and its own history, and that the rules you follow exist for reasons. Knowing the why behind the system is what lets you read a memo and understand it, listen to a roundtable Q&A and know why the question was asked, and notice when something doesn't look right with one of your authorizations or one of your individuals. The next ten modules teach you the specifics. This one teaches you the frame they sit in.

3. Core content

1.1 What HCBS means, and why it exists

HCBS stands for Home and Community-Based Services. It is a category of Medicaid-funded services that lets people with disabilities or chronic conditions live in their own homes or in community settings, with the supports they need to do so, instead of being institutionalized. The federal authority for these services is the Centers for Medicare and Medicaid Services (CMS), the federal agency that runs Medicare and Medicaid. States offer HCBS through what are called waivers: an HCBS waiver is a federal authorization that lets a state use Medicaid dollars for community-based services that Medicaid would not otherwise cover. The word "waiver" reflects that the state is asking CMS to waive specific Medicaid rules (most notably, the institutional-care default) for a defined population and a defined set of services.

HCBS waivers exist for a reason. For most of the 20th century, the way the country supported people with significant disabilities was through institutional placement: large state-run facilities that provided housing, food, and basic care, but at the cost of community participation, individual choice, and (in many cases) basic dignity. Starting in the late 20th century, federal policy, court decisions (most notably the U.S. Supreme Court's Olmstead decision in 1999, which held that unjustified institutionalization of people with disabilities is a form of discrimination under the Americans with Disabilities Act), and the disability rights movement together drove a long shift toward community-based supports. HCBS waivers are the funding mechanism that makes that shift possible at scale.

The practical implication: when you support a person under a DD waiver, you are not just delivering a service, you are participating in a system whose entire purpose is to keep that person in the community when an earlier era would have placed them in an institution. The choices you make about staffing, settings, daily routines, and individual voice are not just operational decisions; they are how the policy actually shows up in someone's life. This frame returns again and again in this course: HCBS Settings (Module 6), person-centered planning (Module 9), and the way risk supports are written into the ISP (Module 7) all flow from it.

1.2 Community-based versus institutional care

It helps to be concrete about the contrast. An institutional placement under Medicaid traditionally meant an Intermediate Care Facility for Individuals with Intellectual Disabilities (ICF/IID): a licensed facility, typically congregate, where care is delivered in a single setting and the institution holds primary control over daily life. Community-based services under HCBS waivers cover the opposite end of the spectrum: a person lives in their own home or apartment, a family home, a sponsored residential arrangement, or a small licensed group home, with services arranged around the person rather than the building.

Three things follow from this contrast and are worth holding in your head as you go through the rest of the course.

• The setting itself is a regulated thing. Federal HCBS rules establish what a community-based setting must look like to qualify (Module 6 covers the federal HCBS Settings Final Rule in depth). Not every congregate setting qualifies; not every group of beds in a house qualifies. The rule exists precisely to prevent a community setting from operating like an institution wearing a different label.
• The person's voice is central by design. Person-centered planning is required, not optional. The Individual Support Plan (ISP) is built around the individual's goals, preferences, and voice (Module 7). This is a direct consequence of the policy choice to fund community-based services, not just a stylistic preference.
• Independence and integration are outcomes the system actively measures. Outcomes are organized around real life areas like employment, healthy living, integrated community involvement, safety and security, and social and spiritual life. The system funds supports that move people toward those outcomes; it does not just fund custodial care.

This is the lens to read every regulation, every form, and every policy memo through: the community-based, person-centered orientation is the whole point.

1.3 Who the system serves

At a high level, Virginia's DD waivers serve people with developmental disabilities as that term is defined under Virginia and federal law. Developmental disability is an umbrella that covers intellectual disability, autism spectrum disorder, cerebral palsy, epilepsy in certain forms, and related conditions that originate before adulthood and result in substantial functional limitations across major life activities. The specific eligibility criteria, including the role of the Virginia Individual Developmental Disabilities Eligibility Survey (VIDES) in establishing functional eligibility, are defined across 12VAC30-122-50 (criteria), -60 (financial eligibility), -70 (assessment and enrollment), and -90 (waiting list and slot process), and are administered through the Community Services Boards (CSBs). The four criteria under -50 are: a diagnosed developmental disability under § 37.2-100 of the Code of Virginia; meets the ICF/IID level of care as demonstrated through the VIDES at least annually (per 42 CFR 441.302); meets the financial eligibility test once a slot is assigned; and indicates willingness to accept waiver services within 30 days of slot assignment. The VIDES is defined at 12VAC30-122-20 and comes in three age-banded forms: DMAS-P235 for infants under 3, DMAS-P236 for ages 3 through 17, and DMAS-P237 for adults 18 and older. The level-of-care determination must be completed no more than six months before enrollment and reviewed annually.

Two practical points matter for you as a provider:

• Eligibility is established before you enter the picture. By the time someone is referred to your agency, they have already been determined eligible for a DD waiver. You are not the gatekeeper for eligibility; the CSB and the state are. Your job is to deliver the services authorized in the person's plan, not to re-litigate whether they qualify.
• The population is genuinely diverse. The DD label spans people whose support needs are relatively light and who are largely independent, people whose support needs are intensive and continuous, and everyone in between. A new provider sometimes carries an unconscious mental model from a single setting they've worked in; the system itself serves a much broader range, and the ISPs, support levels, and services reflect that.

1.4 Slots and the waitlist

One of the first concepts to make peace with is that eligibility is not the same as funding. A person can meet the diagnostic and functional criteria for a DD waiver and still be on a waitlist for years before a slot opens. This is because waivers are funded through a finite number of slots: each slot is a unit of funded service capacity, and the number of slots Virginia operates at any given time is determined by the state budget and federal approval, not by clinical demand. When demand exceeds supply, which has historically been the case, people wait.

The mechanism for assigning waitlist position and prioritizing who comes off the waitlist when slots become available is the Waiver Slot Assignment Committee (WSAC), which operates at the regional level. WSAC uses prioritization criteria that consider urgency of need, caregiver status, and similar factors. You don't run WSAC and you don't sit on it, but you should know it exists, because it explains why a family may have been waiting for years before their loved one shows up on your referral list, and it explains why advocacy at the policy level (more slots, faster slot turnover) is so consistent across the disability community in Virginia.

When a slot is assigned to an individual, the slot is initially set to a Projected enrollment status, and the individual and family are notified. From there, the enrollment lifecycle moves through Accepted to Active, on the timeline Module 5 covers in depth (the 7-day notification window, 15-day acceptance window, the 30-day auto-Accept rule that took effect June 1, 2025, and the 150-day service-start clock under 12VAC30-122-80). For this module, the point is just to know that "slot" is the unit of funded capacity, that slot assignment is upstream of you, and that the enrollment lifecycle starts before you see the referral.

1.5 The Supports Intensity Scale (SIS) and its role

Once a person has a slot and has been assessed for eligibility, the next thing the system does is figure out the intensity of support the person needs across the major life domains. This is what the Supports Intensity Scale (SIS) does. The SIS is a standardized, interview-based assessment developed by the American Association on Intellectual and Developmental Disabilities (AAIDD) that measures the pattern and intensity of support a person needs to participate in everyday community life, not what they can or cannot do on their own.

This is an important distinction. Older approaches to assessment focused on deficits: what the person cannot do, what skills are missing, what their IQ is. The SIS reflects what the field calls the supports paradigm: it asks, given who this person is, what supports do they need to participate fully in life? A high SIS score does not mean a person is "worse off"; it means more support is required to reach the same kind of full, included life everyone deserves. (If your TrainingHub catalog includes the "Understanding the Supports Intensity Scale (SIS)" course, that course goes deeper on the instrument itself; for this module, the framing is enough.)

For your purposes as a provider, three things about the SIS are operationally important:

• The SIS feeds the support level and rate tier. Virginia uses the SIS, plus the Virginia Supplemental Questions (VSQ), and a document review for some individuals, to assign each person a Support Level (1 through 7). Levels 6 and 7 are the exceptional medical and exceptional behavioral levels, identified through the supplemental review process. For services that bill at tiered (acuity-based) rates, the support level determines the rate tier. In plain terms: the SIS feeds the support level, the support level feeds the rate tier, and the rate tier helps fund the staffing that surrounds a person's care. 12VAC30-122-200 (Supports Intensity Scale requirements; Virginia Supplemental Questions; levels of support; supports packages). Virginia uses the SIS-A 2nd Edition for all new adult assessments.
• You may be one of the SIS respondents. The SIS is administered by trained independent assessors contracted by DBHDS, not by the provider agency. But the assessment relies on respondents who know the person well across settings over a meaningful period of time, and a DSP or supervisor is often one of those respondents. Your job, if you are a respondent, is to give accurate, honest, specific information about the support the person actually needs — not more than they need to look "more impaired," and not less to make them look more independent than they are. Both kinds of distortion cause real harm.
• Reassessment is periodic. A SIS is not a one-time event. People are reassessed on a schedule, and a reassessment can happen sooner when a person's support needs change significantly. If you notice that a person you support has clearly changed (either in need or in independence), raising it with the support coordinator is part of your job.

1.6 Where you sit in the system

Pull back and look at the whole shape. At the top, CMS sets the federal HCBS rules. Below CMS, DMAS (Department of Medical Assistance Services) runs Virginia's Medicaid program, including waiver service authorization and payment. Alongside DMAS, DBHDS (Department of Behavioral Health and Developmental Services) handles provider licensing, oversight, the Office of Human Rights, and policy for the DD waivers themselves. Regional Community Services Boards (CSBs) are the local entry point, and the support coordinators they employ are the case managers for individuals on waivers. Two key vendors are Gainwell Technologies (the DMAS provider enrollment vendor) and FEi Systems (the WaMS vendor). At the delivery end are providers (your agency), and at the center of all of it is the individual and their family.

As a provider, your interactions go in three directions:

• Up to the state: licensing under DBHDS, enrollment and billing under DMAS (through Gainwell), service authorizations under DMAS through WaMS, and incident reporting and human rights complaints under DBHDS Office of Human Rights.
• Across to the support coordinator: the SC at the CSB is your day-to-day partner on each individual's plan, authorizations, and reviews.
• Down to the individual and the household: the person and their family are the center of person-centered planning and daily delivery.

The next ten modules each zoom in on a specific piece. Module 2 covers the players and the regulations in more detail. Module 3 covers the three waivers. Modules 4 and 5 cover enrollment and WaMS. Modules 6, 7, and 8 cover settings, the ISP, and competencies. Modules 9, 10, and 11 cover person-centered practice, health/safety/risk, and staying current. Keep coming back to this map; it is the spine the rest hangs on.

4. Worked example

Meet "the Pham family." Lan Pham is a 27-year-old Virginia resident with autism and an intellectual disability. She has been living at home with her parents since adolescence, supported informally by her family, with no Medicaid-funded services. Here is how the system shows up in her life, walked end to end.

1. Eligibility and screening. When Lan was 22, her parents reached out to the local CSB. The CSB completed a VIDES screening and confirmed her functional eligibility for a DD waiver.
2. The waitlist. Lan was added to the waitlist. The regional WSAC reviewed her priority and placed her on the urgent-need list because her aging parents had limited capacity to continue supporting her at her current level of need.
3. A slot opens. Five years later, a Community Living (CL) waiver slot becomes available in her region. WSAC assigns it to Lan. The CSB notifies the family. Enrollment track: Projected. (Module 5 covers the rest of this lifecycle: Accepted within 15 days — or auto-Accepted at 30 — and Active when her first service is approved.)
4. The SIS. A DBHDS-contracted assessor conducts a SIS interview. Lan's mother, her father, and a long-time community connector who has known Lan for years are the respondents. The interview produces a profile of Lan's support needs across the life-activity areas, plus the exceptional medical and behavioral section. Combined with the Virginia Supplemental Questions, this gets Lan a support level that determines her rate tier.
5. The ISP and the provider. A support coordinator at the CSB develops Parts I through IV of Lan's ISP, organizing her goals around the standard life areas. Your agency (in this scenario) is approached as a potential provider for in-home residential support. Once the SC links your agency, you can read the plan and complete Part V, your plan for the supports you will actually deliver.
6. Services start. Once Lan's service authorization clears Medicaid approval, her enrollment status flips to Active and you begin delivering services. The SIS sits behind all of it, shaping the rate that helps fund the staffing intensity Lan actually needs.

The whole arc is the system: federal rules at the top, state policy and assessment in the middle, your agency at the delivery end, and Lan at the center. Every other module is a deeper look at one part of this arc.

5. What trips up new providers

• Confusing eligibility with funding. A person can be eligible for a DD waiver and still wait years for a slot. Slot scarcity is real and structural; advocate for more slots at the policy level if you can, but understand the constraint when you are talking to families.
• Skipping the "why" and going straight to the "what." A provider who never asks why HCBS waivers exist often produces compliant-on-paper but uninspired services. Hold the community-integration, person-centered orientation in your head; it pays off everywhere downstream.
• Treating the SIS as a clinical or IQ test. It is neither. It measures support needs. A high score is not a verdict on the person; it is information about what supports are required for them to live a full, included life.
• Reading every interaction as transactional rather than systemic. When a service authorization gets pended, when the CSB calls about an incident, when a memo from DBHDS lands in your inbox, those are not isolated events. They are signals from the system. Take them as such.
• Confusing DBHDS with DMAS, or "the state" with one agency. DBHDS handles licensing, oversight, and the DD waivers' policy; DMAS handles Medicaid administration and reimbursement; CSBs are local. Module 2 makes this concrete, but if you confuse them at the start it will haunt you in every help-desk call.

6. Key takeaways and job aid

Key takeaways

• HCBS waivers are a Medicaid mechanism, authorized by CMS, that lets states fund community-based supports for people who would otherwise be at risk of institutional placement. They exist for a reason: a decades-long policy and rights-based shift from institutions to community.
• Virginia's DD waivers serve people with developmental disabilities at a wide range of support intensity. Eligibility is established before the individual reaches you; your job is to deliver authorized services well.
• Slots are the unit of funded capacity. Eligibility does not equal a slot, which is why the waitlist exists. WSAC handles slot assignment.
• The Supports Intensity Scale measures support needs, not deficits, and feeds the support level and rate tier under Virginia's system.
• Your agency sits at the delivery end of a system that involves CMS, DMAS, DBHDS, CSBs, support coordinators, and vendors (Gainwell, FEi Systems). Knowing the shape of that system makes every subsequent module easier.

Download as PDF · One-page system map (PDF)

Job aid: One-page system map

CMS (federal HCBS authority) → DMAS (Virginia Medicaid, payment, service authorization) and DBHDS (DD waiver policy, licensing, Office of Human Rights). Local entry point: Community Services Boards (CSBs), with support coordinators as case managers. Vendors: Gainwell (DMAS enrollment), FEi Systems (WaMS). Provider: you. At the center: the individual and family. Cross-cutting tools: the SIS (needs assessment), the ISP (the plan), WaMS (the system of record).

Sources and currency

Currency stamp: Reviewed June 2026. Verify regulatory citations against the published 12VAC30-122 before publish.

Public sources used:

• Centers for Medicare and Medicaid Services, HCBS waiver guidance.
• Olmstead v. L.C., 527 U.S. 581 (1999).
• Virginia Administrative Code 12VAC30-122 (Virginia DD waivers regulation); 12VAC30-122-200 (SIS, VSQ, support levels, supports packages).
• Virginia DBHDS public materials on the DD waivers, WSAC, and developmental disability eligibility.
• American Association on Intellectual and Developmental Disabilities (AAIDD), Supports Intensity Scale documentation.

Verified citations (June 2026 accuracy pass):

• Eligibility: 12VAC30-122-50 (criteria), -60 (financial), -70 (assessment + VIDES), -90 (waiting list, slot process). VIDES defined at -20. Developmental disability defined at § 37.2-100 of the Code of Virginia. A person who accepts a slot but does not start services within five months is terminated from the waiver (-90).
• VIDES forms by age: DMAS-P235 (infants under 3), DMAS-P236 (ages 3–17), DMAS-P237 (adults 18+). Dependency threshold: 2+ categories for infants and children, 3+ for adults (DMAS DD Waiver Provider Manual, Chapter 6).
• SIS framework: 12VAC30-122-200 (Supports Intensity Scale requirements, Virginia Supplemental Questions, levels of support, supports packages). Virginia uses SIS-A 2nd Edition for new adult assessments. Reassessment under -200: at least every 4 years for adults 22+, every 2 years for ages 5–15 with tiered services, sooner if needs change significantly for a sustained 6-month period.

Currency: 12VAC30-122 derives from Virginia Register Vol. 37, Issue 14, effective March 31, 2021, with subsequent amendments. Sections last verified June 2026 via law.lis.virginia.gov.