Mr. Matthew Grelling
M.A. M.F.T. | Mental Health Counselor
1111 Grand Ave Ste J, Diamond Bar
California, 91765-4172
951-505-0019 Maps & DirectionsMr. Matthew Grelling is a Diamond Bar, California based counselor who is specialized as Mental Health Counselor. Active license number of Mr. Matthew Grelling is MFT 35675 for Mental Health Counselor in California. His current practice location is 1111 Grand Ave Ste J, Diamond Bar. Patients can book an appointment with him at 951-505-0019.
Mr. Matthew Grelling is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. He assess clients’ mental health conditions and develop personalized treatment plans to provide therapy for a range of mental health issues, including anxiety, depression, trauma, relationship issues, stress, grief, and life transitions.
Complete Profile:
Mr. Matthew Grelling speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
| Name: | Mr. Matthew Grelling |
| Specialization: | Mental Health Counselor |
| Gender: | Male |
| Credentials: | M.A. M.F.T. |
| Accepts Medicare Assignment: | No |
| Practice Address: | 1111 Grand Ave Ste J, Diamond Bar,
California, 91765-4172 |
| Phone: | 951-505-0019 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| NPI Number: | 1831239037 |
| NPI Enumeration Date: | 07 Feb, 2007 |
| NPI Last Update On: | 08 Jul, 2007 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mr. Matthew Grelling are as mentioned below.
| License Number | Specialization | State | Status | |
| MFT 35675 | Mental Health Counselor | California | Primary | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | 732 Occidental Dr,
Claremont, California |
| Zip: | 91711-2632 |
| Phone Number: | 951-505-0019 |
Patients can reach Mr. Matthew Grelling at
1111 Grand Ave Ste J, Diamond Bar, California or can
call to book an appointment on 951-505-0019.
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Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 09 February, 2026.