Robert J. Wielenga, MD, a Professional Corporation
NPI 1043363807 · Family Medicine Physician · Downey, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert J. Wielenga, MD, a Professional Corporation is a Family Medicine Physician organization in Downey, CA (NPI 1043363807).
Provider details
- NPI number
- 1043363807
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Robert Wielenga, Ceo(562) 923-9100
- License
- G81044 (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
19 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
- 2007-01-18
- Last updated
- 2020-02-26
- Certified
- 2020-02-26
Frequently asked questions
- What is Robert J. Wielenga, MD, a Professional Corporation's NPI number?
- Robert J. Wielenga, MD, a Professional Corporation's National Provider Identifier (NPI) is 1043363807, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Robert J. Wielenga, MD, a Professional Corporation?
- Robert J. Wielenga, MD, a Professional Corporation is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert J. Wielenga, MD, a Professional Corporation located?
- Robert J. Wielenga, MD, a Professional Corporation's practice location on file with NPPES is 10835 New St, Downey, CA 90241-3714.
- What is Robert J. Wielenga, MD, a Professional Corporation's phone number?
- The practice phone number listed in the NPPES registry for Robert J. Wielenga, MD, a Professional Corporation is (562) 923-9100.
- Does Robert J. Wielenga, MD, a Professional Corporation accept Medicare?
- Robert J. Wielenga, MD, a Professional Corporation 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 Robert J. Wielenga, MD, a Professional Corporation?
- The authorized official listed on Robert J. Wielenga, MD, a Professional Corporation's NPPES record is Robert Wielenga, Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Robert J. Wielenga, MD, a Professional Corporation's NPI active?
- Yes — Robert J. Wielenga, MD, a Professional Corporation's NPI (1043363807) is active in the NPPES registry as of the last update on 2020-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.