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ALLEN R.M. CASTILLO MD
NPI 1396881850
Pediatrics in Harvard, IL

Active since January 30, 2007PECOS Enrolled
348 S DIVISION ST, HARVARD, IL 60033(815) 943-1122 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Allen R.m. Castillo Md NPPES

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

ALLEN R.M. CASTILLO MD (NPI 1396881850) is an individual pediatrics provider in Harvard, Illinois and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396881850
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameALLEN R.M. CASTILLOCredential: MD
Location Address348 S DIVISION STHarvard, IL 60033-3247
Mailing Address348 S Division StHarvard, IL 60033-3247 · (815) 943-1122
Phone(815) 943-1122
Sole ProprietorNo
Enumeration DateJanuary 30, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1396881850 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
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.
348 S DIVISION ST, Harvard, IL 60033
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Other Identifiers 1

Medicare UPING18516

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allen R.m. 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

2

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

Mercy Harvard Hospital Inc
1.0 mi
Critical Access
901 GRANT ST
Harvard, IL 60033
  • Reassigned Medicare billing, Illinois enrollment
  • 382 clinicians in this Medicare group
NPI 1427001445 (815) 943-5431
Mercy Health System Corporation
28 mi
Multi-Specialty
580 N WASHINGTON ST
Janesville, WI 53548
  • Reassigned Medicare billing, Illinois enrollment
  • 671 clinicians in this Medicare group
NPI 1598718603 (608) 741-7630

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 60033 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
$85.71 typical visit price
range $54.80 – $168.44
Typical copayment $21.42 (range $13.70 – $42.11)
Most-billed visit code 99203
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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 3

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

MERCY HEALTH SYSTEM CORPORATION
Durable Medical Equipment & Medical Supplies
348 S DIVISION ST
HARVARD, IL 60033
McHenry County (815) 943-1122
ELIZABETH ANNE STEFFENS NP-C
Nurse Practitioner (Adult Health)
348 S DIVISION ST
HARVARD, IL 60033
McHenry County (815) 943-1122
DR. SHAILESH R VIRANI MD
Family Medicine
348 S DIVISION ST
HARVARD, IL 60033
McHenry County (815) 943-1122

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 Allen Castillo's NPI number?

The NPI number for Allen Castillo is 1396881850. It was assigned to this individual provider in the NPPES registry on January 30, 2007.

Where is Allen Castillo located?

Allen Castillo practices at 348 S Division St, Harvard, IL 60033. The listed phone number is (815) 943-1122.

What is Allen Castillo's specialty?

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

Is Allen Castillo enrolled in Medicare?

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

Which organizations bill Medicare for Allen Castillo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allen Castillo reassigns Medicare benefits to 2 organizations: Mercy Harvard Hospital Inc (Harvard, IL) and Mercy Health System Corporation (Janesville, WI). 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 Allen Castillo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Allen Castillo accept?

Health plans from Anthem Blue Cross and Blue Shield list Allen 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 Allen Castillo was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.