Colter Lynn Diehl, MFTI

Marriage & Family Therapist

Telehealth Available
NPI Active per CMS — Q2 2026|Medicare Enrolled|Order & Refer

Colter Lynn Diehl, MFTI has practiced marriage & family therapist for 12+ years, working in group practice. He has been practicing since 2015 — over 12 years. A marriage and family therapist is a person with a master's degree in marriage and family therapy.

1 of 736 Marriage & Family Therapist providers in CASee all Marriage & Family Therapist in Napa12+ years experienceNPI since 2015

Older · 3865dNPPES updated 2015-10-06 · verify on CMS

Contact & Location

Practice Location

1100 Lincoln Ave Suite 202, Napa, CA 94558-4900

Fax: (707) 255-3715

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Background & Specialty

Education, training, and specialty classification from CMS NPPES and Medicare records.

Career Journey
  1. 12 years in practice

    Established

Marriage & Family TherapistBehavioral Health & Social Service Providers

A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.

Taxonomy: 106H00000X

Practice Footprint

Mailing address

1100 Lincoln Ave Suite 108, Napa, CA 94558-4900

Differs from practice location

Virtual Marriage & Family Therapist Care With Colter Lynn Diehl

NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.

Schedule a virtual visit with Colter Lynn Diehl for follow-ups, medication reviews, and ongoing care — no travel to Napa required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.

Frequently Asked Questions

Common questions about Colter Lynn Diehl

Dr. Diehl is listed as active in the NPI registry with telehealth listed in Napa, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (707) 255-3718.

Verified across 2 federal data sources

Sourced from CMS NPPES · OIG LEIE. See Data Methodology.

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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.

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