Guillermo Valenzuela, MD
NPI 1730263484 · Maternal & Fetal Medicine Physician · Colton, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Valenzuela, MD is a Maternal & Fetal Medicine Physician provider in Colton, CA (NPI 1730263484).
Provider details
- NPI number
- 1730263484
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A38671 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$72 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-25
- Last updated
- 2020-05-29
- Certified
- 2020-05-29
Frequently asked questions
- What is Guillermo Valenzuela's NPI number?
- Guillermo Valenzuela's National Provider Identifier (NPI) is 1730263484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Valenzuela's specialty?
- Guillermo Valenzuela is listed in the NPPES registry with a primary specialty of Maternal & Fetal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Valenzuela located?
- Guillermo Valenzuela's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is Guillermo Valenzuela's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Valenzuela is (909) 580-6333.
- Does Guillermo Valenzuela accept Medicare?
- Guillermo Valenzuela is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Valenzuela's NPI active?
- Yes — Guillermo Valenzuela's NPI (1730263484) is active in the NPPES registry as of the last update on 2020-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.