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ALEJANDRO FRANCISCO SILLER JR. MD, MSCI
NPI 1558893198
Pediatrics - Pediatric Endocrinology in Houston, TX

Active since April 02, 2017PECOS Enrolled
1 BAYLOR PLZ # BCM320, HOUSTON, TX 77030(832) 824-1170 Get Directions Write a Review

NPPES record last updated: August 22, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 22, 2024, Apr 3, 2020, Apr 2, 2017 (3 updates tracked since 2017).

About Alejandro Francisco Siller Jr. Md, Msci NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALEJANDRO FRANCISCO SILLER JR. MD, MSCI (NPI 1558893198) is an individual pediatric endocrinology provider in Houston, Texas, licensed in Texas (S6047) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1558893198
Entity TypeIndividualMale
Primary Taxonomy2080P0205X
Provider Legal NameALEJANDRO FRANCISCO SILLER JR.Credential: MD, MSCI
Location Address1 BAYLOR PLZ # BCM320Houston, TX 77030-3411
Mailing Address3852 Shaw BlvdSaint Louis, MO 63110-3741 · (936) 525-0166
Phone(832) 824-1170
Sole ProprietorNo
Enumeration DateApril 2, 2017
Last NPPES UpdateAugust 22, 20243 updates tracked since enumeration
NPPES CertifiedAugust 22, 2024
✔ NPI 1558893198 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0205X
License✔ Licensed in TX · S6047
Definition
A pediatrician who provides expert care to infants, children and adolescents who have diseases that result from an abnormality in the endocrine glands (glands which secrete hormones). These diseases include diabetes mellitus, growth failure, unusual size for age, early or late pubertal development, birth defects, the genital region and disorders of the thyroid, the adrenal and pituitary glands.
Also ListedPediatricsTaxonomy 208000000X · License S6047 (TX)
1 BAYLOR PLZ # BCM320, Houston, TX 77030
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Moda Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alejandro Francisco Siller Jr. Md, Msci is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Alejandro Siller reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Baylor College Of Medicine
0.2 mi
Family Medicine
1504 TAUB LOOP
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • 2,296 clinicians in this Medicare group
NPI 1053352914 (713) 873-2000
Texas Children's Physician Group
0.3 mi
Pediatrics
6621 FANNIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Texas Childrens Physician Group
  • 2,498 clinicians in this Medicare group
NPI 1861675506 (832) 824-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KHANH LINH NGUYEN MD
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
SRAVYA REDDY GURIVIREDDYGARI MD, MPH
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
COURTNEY THUY HANG HUYNH
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
ASHWIN SRIVATSAV
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
CHARLES BURKE
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
LAWRENCE WILLIAM MORRIS HAMILTON
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
DR. ALISHA SADHWANI MBBS, BSC
Student in an Organized Health Care Education/Training Program
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170
ELLEN WITTE MUELLER MD
Pediatrics
1 BAYLOR PLZ # BCM320
HOUSTON, TX 77030
Harris County (832) 824-1170

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alejandro Siller's NPI number?

The NPI number for Alejandro Siller is 1558893198. It was assigned to this individual provider in the NPPES registry on April 2, 2017.

Where is Alejandro Siller located?

Alejandro Siller practices at 1 Baylor Plz # Bcm320, Houston, TX 77030. The listed phone number is (832) 824-1170.

What is Alejandro Siller's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Endocrinology, with taxonomy code 2080P0205X.

Is Alejandro Siller enrolled in Medicare?

Yes. Alejandro Siller is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Alejandro Siller's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alejandro Siller reassigns Medicare benefits to 2 organizations: Baylor College Of Medicine (Houston, TX) and Texas Children's Physician Group (Houston, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alejandro Siller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alejandro Siller accept?

Health plans from Moda Health Plan, Inc. list Alejandro Siller as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alejandro Siller was last updated on August 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.