Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark a Welch DO, Inc

Organization Psychiatry Physician · NPI 1770031312

Mark a Welch DO, Inc is a Psychiatry Physician in Rancho Cucamonga, California. Licensed in California. Registered with an NPI since 2016.

Licensed in
CA
In the registry since
2016
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

10737 Laurel St Ste 230
Rancho Cucamonga, CA 91730-3837
Phone: (909) 989-5556
Fax: (909) 989-5558
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 2OA8950 (CA)

Record details

NPI number1770031312
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Welch — Doctor · (951) 966-5802
NPI enumeratedSeptember 12, 2016
Last updated in NPPESSeptember 12, 2016
Mailing address10737 Laurel St, Suite 230, Rancho Cucamonga, CA 91730-3837

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