Heather Difonzo, M.S., CCC-SLP
Certificate of Clinical Competence in Speech-Language Pathology, recognized by American Speech-Language-Hearing Association · NPI 1740561091 (Centers for Medicare & Medicaid Services)
Last updated: April 17, 2026
Chelmsford, MA
Speech Therapy
Accepting Patients
Provider Details
- NPI Number
- 1740561091
- Credentials
- M.S., CCC-SLP
- Service Setting
- In-Clinic
- Languages
- English
Specialties
Helpful Resources for Parents
Guides to help you decide if this type of therapy is right for your child, what to ask, and what to expect.
Finding the Right Pediatric Therapist for Your Child: A Parent's Complete Guide
How to vet credentials, what to ask at the first visit, and when to switch.
Read guide →
Pediatric Speech Therapy: A Complete Parent's Guide
What speech therapy covers, what to expect, and how to choose an SLP.
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Childhood Apraxia of Speech: A Parent's Guide
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Articulation vs. Language Disorders: What's the Difference?
Read guide →