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JULIO CESAR CASTILLO MD
NPI 1417989203
Pediatrics in Prosper, TX

Active since July 06, 2006PECOS Enrolled
4100 W UNIVERSITY DR, PROSPER, TX 75078(945) 204-4100(682) 885-1903 Get Directions Write a Review

NPPES record last updated: February 23, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 23, 2023, Feb 3, 2021 (2 updates tracked since 2021).

About Julio Cesar Castillo Md NPPES

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

JULIO CESAR CASTILLO MD (NPI 1417989203) is an individual pediatrics provider in Prosper, Texas, licensed in Texas (P4292) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1417989203
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameJULIO CESAR CASTILLOCredential: MD
Location Address4100 W UNIVERSITY DRProsper, TX 75078-3123
Mailing AddressPo Box 733784Dallas, TX 75373-3784 · (682) 885-6483 · Fax (682) 885-3113
Phone(945) 204-4100
Fax(682) 885-1903
Sole ProprietorNo
Enumeration DateJuly 6, 2006
Last NPPES UpdateFebruary 23, 20232 updates tracked since enumeration
NPPES CertifiedFebruary 23, 2023
✔ NPI 1417989203 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in TX · P4292
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
4100 W UNIVERSITY DR, Prosper, TX 75078
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Imperial Insurance Companies, Inc., Oscar Health Maintenance Organization of Florida.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Julio Cesar Castillo Md 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

7

Medicare enrollment records show Julio Castillo reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pediatric Emergency Medicine Group LLP
11 mi
Emergency Medicine
7601 PRESTON RD
Plano, TX 75024
  • Reassigned Medicare billing, Texas enrollment
  • 123 clinicians in this Medicare group
NPI 1629448535 (817) 451-4208
Cook Children's Physician Network
43 mi
Pediatrics
801 7TH AVE
Fort Worth, TX 76104
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Cook Childrens Physician Network
  • 1,186 clinicians in this Medicare group
NPI 1083472062 (682) 885-6483
Emergency Medicine Services Of Tx, PLLC
275 mi
Emergency Medicine
7700 FLOYD CURL DR
San Antonio, TX 78229
  • Reassigned Medicare billing, Texas enrollment
  • 1,452 clinicians in this Medicare group
NPI 1245938729 (210) 575-4000
Van Meter Emergency Physicians Inc. Apmc
444 mi
Emergency Medicine
95 E FAIRWAY DR
Covington, LA 70433
  • Reassigned Medicare billing, Louisiana enrollment
  • 159 clinicians in this Medicare group
NPI 1649410697 (985) 867-4000
Independence Emergency Group LLC
452 mi
Emergency Medicine
4700 S I 10 SERVICE RD W
Metairie, LA 70001
  • Reassigned Medicare billing, Louisiana enrollment
  • 114 clinicians in this Medicare group
NPI 1528384773 (504) 885-3333
Panhandle Emergency Physicians A Div Of Sacred Heart Hosp Pensacola
598 mi
Emergency Medicine
5151 N 9TH AVE, ER
Pensacola, FL 32504
  • Reassigned Medicare billing, Florida enrollment
  • 108 clinicians in this Medicare group
NPI 1215948096 (850) 416-7000
Emergency Medicine Services Of Fl, LLC
1,122 mi
Emergency Medicine
20900 BISCAYNE BLVD
Aventura, FL 33180
  • Reassigned Medicare billing, Florida enrollment
  • 1,912 clinicians in this Medicare group
NPI 1043917180 (305) 682-7000

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 75078 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

SANA JAMIL SIDDIQUI-YOUSUFZAI M.D.
Hospitalist
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
NATALIE NIMER SMITH M.D.
Pediatrics (Pediatric Emergency Medicine)
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
ALOCHANA RAGULA MD
Hospitalist
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
PAULINA JOANNA RAMOS-COBORN MD
Hospitalist
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
JAY S JEON
Hospitalist
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
AMY CHENG M.D.
Pediatrics (Pediatric Emergency Medicine)
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100
MICHAEL PALDINO MD
Radiology (Neuroradiology)
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (682) 885-6483
JILL YVONNE STEINBACH CPNP-AC
Nurse Practitioner (Acute Care)
4100 W UNIVERSITY DR
PROSPER, TX 75078
Collin County (945) 204-4100

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 Julio Castillo's NPI number?

The NPI number for Julio Castillo is 1417989203. It was assigned to this individual provider in the NPPES registry on July 6, 2006.

Where is Julio Castillo located?

Julio Castillo practices at 4100 W University Dr, Prosper, TX 75078. The listed phone number is (945) 204-4100.

What is Julio Castillo's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Julio Castillo enrolled in Medicare?

Yes. Julio Castillo is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Julio Castillo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Julio Castillo reassigns Medicare benefits to 7 organizations: Pediatric Emergency Medicine Group LLP (Plano, TX), Cook Children's Physician Network (Fort Worth, TX), Emergency Medicine Services Of Tx, PLLC (San Antonio, TX), Van Meter Emergency Physicians Inc. Apmc (Covington, LA), Independence Emergency Group LLC (Metairie, LA) and 2 more organizations, listed in the Medicare section above. 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 Julio Castillo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Julio Castillo accept?

Health plans from Blue Cross and Blue Shield of Texas, Imperial Insurance Companies, Inc. and Oscar Health Maintenance Organization of Florida list Julio Castillo 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 Julio Castillo was last updated on February 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.