Mark a Welch DO, Inc
NPI 1770031312 · Psychiatry Physician · Rancho Cucamonga, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark a Welch DO, Inc is a Psychiatry Physician organization in Rancho Cucamonga, CA (NPI 1770031312).
Provider details
- NPI number
- 1770031312
- Entity type
- Organization
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Welch, Doctor(951) 966-5802
- License
- 2OA8950 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-09-12
- Last updated
- 2016-09-12
Frequently asked questions
- What is Mark a Welch DO, Inc's NPI number?
- Mark a Welch DO, Inc's National Provider Identifier (NPI) is 1770031312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark a Welch DO, Inc?
- Mark a Welch DO, Inc is classified in the NPPES registry as Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark a Welch DO, Inc located?
- Mark a Welch DO, Inc's practice location on file with NPPES is 10737 Laurel St, Rancho Cucamonga, CA 91730-3837.
- What is Mark a Welch DO, Inc's phone number?
- The practice phone number listed in the NPPES registry for Mark a Welch DO, Inc is (909) 989-5556.
- Does Mark a Welch DO, Inc accept Medicare?
- Mark a Welch DO, Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark a Welch DO, Inc?
- The authorized official listed on Mark a Welch DO, Inc's NPPES record is Mark Welch, Doctor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark a Welch DO, Inc's NPI active?
- Yes — Mark a Welch DO, Inc's NPI (1770031312) is active in the NPPES registry as of the last update on 2016-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.