Trellis Services: ABA therapy provider in Maryland
Directory ID: md-trellis-services
Last verified: 2026-10-22
Listing type: Free listing

== SUMMARY ==
Trellis Services provides applied behavior analysis (ABA) therapy in Maryland. Services: Applied Behavior Analysis, In-home ABA therapy, School-based ABA, Community-based ABA, Early intervention, Social skills groups, Occupational therapy, Diagnostic evaluations, Telehealth ABA. Counties served: Baltimore City, Baltimore County, Harford County, Howard County. Insurance listed: Maryland Medicaid (ABA benefit via the state behavioral health ASO), Maryland Medicaid (Medical Assistance), Kaiser Permanente (Mid-Atlantic), CareFirst BlueCross BlueShield.

== CONTACT ==
Phone: (443) 330-7900
Other phones: (144) 333-7900 (corporate/central line)
Website: https://www.trellisservices.com
Source: https://trellisservices.com/; https://marylandbehavioralhealth.optum.com/content/dam/ops-maryland/documents/provider/Alerts/march-2023/aba-stuff/ABA%20Provider%20Referral%20List_Updated_3.2023.pdf; https://pathfindersforautism.org/provider-view?view=64d830388b (checked 2026-10-22)

== LOCATIONS ==
Location 1: 14550 York Rd, Sparks, MD 21152 (Baltimore County)
Location 2: 14550 A York Road, Sparks, MD 21152 (Baltimore County)
Source: https://npiregistry.cms.hhs.gov/provider-view/1982032405; https://pathfindersforautism.org/provider-view?view=64d830388b (checked 2026-10-22)

== SERVICES ==
- Applied Behavior Analysis
- In-home ABA therapy
- School-based ABA
- Community-based ABA
- Early intervention
- Social skills groups
- Occupational therapy
- Diagnostic evaluations
- Telehealth ABA
Source: https://npiregistry.cms.hhs.gov/provider-view/1982032405; https://trellisservices.com/; https://trellisservices.com/services (checked 2026-10-22)

== AREAS SERVED ==
Counties: Baltimore City, Baltimore County, Harford County, Howard County
Cities/towns named on site: Baltimore, Timonium, Columbia, Towson, Owings Mills, Pikesville, Catonsville, Hunt Valley, Essex, Dundalk, Randallstown, Bel Air, Aberdeen, Edgewood, Havre de Grace, Abingdon, Forest Hill, Fallston
Source: https://trellisservices.com/; https://npiregistry.cms.hhs.gov/provider-view/1982032405; https://trellisservices.com/locations/forest-hill (checked 2026-10-22)

== INSURANCE ==
- Maryland Medicaid (ABA benefit via the state behavioral health ASO)
- Maryland Medicaid (Medical Assistance)
- Kaiser Permanente (Mid-Atlantic)
- CareFirst BlueCross BlueShield
Source: https://marylandbehavioralhealth.optum.com/content/dam/ops-maryland/documents/provider/Alerts/march-2023/aba-stuff/ABA%20Provider%20Referral%20List_Updated_3.2023.pdf; https://trellisservices.com/locations/forest-hill; https://mydoctor.kaiserpermanente.org/mas/article/aba-preferred-providers-2045019 (checked 2026-10-22)

== HOW TO START (from the agency's site) ==
1. Contact the agency or submit an intake/inquiry form
2. A referral or prescription may be needed
3. Initial assessment by a BCBA
Source: https://trellisservices.com/services/aba-therapy; https://trellisservices.com/; https://trellisservices.com/services/diagnosing-autism (checked 2026-10-22)

== QUESTIONS AND ANSWERS ==
Q: Does Trellis Services accept Maryland Medicaid?
A: Yes. Maryland Medicaid is listed as accepted. Source: https://marylandbehavioralhealth.optum.com/content/dam/ops-maryland/documents/provider/Alerts/march-2023/aba-stuff/ABA%20Provider%20Referral%20List_Updated_3.2023.pdf; https://trellisservices.com/locations/forest-hill (checked 2026-10-22)
Q: What insurance does Trellis Services take?
A: Maryland Medicaid (ABA benefit via the state behavioral health ASO), Maryland Medicaid (Medical Assistance), Kaiser Permanente (Mid-Atlantic), CareFirst BlueCross BlueShield. Source: https://marylandbehavioralhealth.optum.com/content/dam/ops-maryland/documents/provider/Alerts/march-2023/aba-stuff/ABA%20Provider%20Referral%20List_Updated_3.2023.pdf; https://trellisservices.com/locations/forest-hill; https://mydoctor.kaiserpermanente.org/mas/article/aba-preferred-providers-2045019 (checked 2026-10-22)
Q: What ages does Trellis Services serve?
A: Not listed on this free page. Contact the agency at (443) 330-7900.
Q: Does Trellis Services offer in-home ABA?
A: Yes. Source: https://trellisservices.com/ (checked 2026-10-22)
Q: Does Trellis Services have a clinic or center?
A: Not stated on the agency website.
Q: Which Maryland counties does Trellis Services serve?
A: Baltimore City, Baltimore County, Harford County, Howard County. Source: https://trellisservices.com/; https://npiregistry.cms.hhs.gov/provider-view/1982032405; https://trellisservices.com/locations/forest-hill (checked 2026-10-22)
Q: How do I start services with Trellis Services?
A: Contact the agency or submit an intake/inquiry form -> A referral or prescription may be needed -> Initial assessment by a BCBA. Contact the agency at (443) 330-7900 or visit https://www.trellisservices.com.

== ABOUT THIS RECORD ==
Compiled from the agency's own website and the CMS NPPES registry; last verified 2026-10-22. Facts extracted automatically and spot-checked by sample. Not medical advice; not an endorsement.