Alejandro Siller, MD, MSCI
NPI 1558893198 · Pediatric Endocrinology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alejandro Siller, MD, MSCI is a Pediatric Endocrinology Physician provider in Houston, TX (NPI 1558893198).
Provider details
- NPI number
- 1558893198
- Entity type
- Individual
- Primary specialty
- Pediatric Endocrinology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MSCI
- Sex
- Male
- Sole proprietor
- No
- License
- S6047 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 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.
$181 across 3 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
- 2017-04-02
- Last updated
- 2024-08-22
- Certified
- 2024-08-22
Frequently asked questions
- What is Alejandro Siller's NPI number?
- Alejandro Siller's National Provider Identifier (NPI) is 1558893198, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alejandro Siller's specialty?
- Alejandro Siller is listed in the NPPES registry with a primary specialty of Pediatric Endocrinology Physician (Allopathic & Osteopathic Physicians).
- Where is Alejandro Siller located?
- Alejandro Siller's practice location on file with NPPES is 1 Baylor Plz # Bcm320, Houston, TX 77030-3411.
- What is Alejandro Siller's phone number?
- The practice phone number listed in the NPPES registry for Alejandro Siller is (832) 824-1170.
- Does Alejandro Siller accept Medicare?
- Alejandro Siller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alejandro Siller's NPI active?
- Yes — Alejandro Siller's NPI (1558893198) is active in the NPPES registry as of the last update on 2024-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.