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DR. ROSELIA GUILLEN-SANTANA M.D.
NPI 1235140922
Pediatrics in Hempstead, NY

Active since August 10, 2006PECOS Enrolled
250 FULTON AVE FL 1, HEMPSTEAD, NY 11550(516) 497-7520(516) 280-9051 Get Directions Write a Review

NPPES record last updated: June 16, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Roselia Guillen-santana M.d. NPPES

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

DR. ROSELIA GUILLEN-SANTANA M.D. (NPI 1235140922) is an individual pediatrics provider in Hempstead, New York, licensed in New York (240701) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235140922
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. ROSELIA GUILLEN-SANTANACredential: M.D.
Location Address250 FULTON AVE FL 1Hempstead, NY 11550-3917
Mailing Address250 Fulton Ave Fl 1Hempstead, NY 11550-3917 · (516) 497-7520 · Fax (516) 280-9051
Phone(516) 497-7520
Fax(516) 280-9051
Sole ProprietorNo
Enumeration DateAugust 10, 2006
Last NPPES UpdateJune 16, 2026
NPPES CertifiedJune 16, 2026
✔ NPI 1235140922 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in NY · 240701
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.
250 FULTON AVE FL 1, Hempstead, NY 11550
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Roselia Guillen-santana M.d. 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 Roselia Guillen-santana reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mount Sinai School Of Medicine
0.2 mi
Psychiatry
175 FULTON AVE STE 309
Hempstead, NY 11550
  • Reassigned Medicare billing, New York enrollment
  • 302 clinicians in this Medicare group
NPI 1508333956 (516) 485-5710
Sun River Health Inc
18 mi
Adult Day Care
1543-1545 INWOOD AVENUE, HUDSON RIVER HEALTHCARE ADULT DAY PROGRAM
Bronx, NY 10452
  • Reassigned Medicare billing, New York enrollment
  • 683 clinicians in this Medicare group
NPI 1740763275 (855) 681-8700

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 11550 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
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
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.

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 Roselia Guillen-santana's NPI number?

The NPI number for Roselia Guillen-santana is 1235140922. It was assigned to this individual provider in the NPPES registry on August 10, 2006.

Where is Roselia Guillen-santana located?

Roselia Guillen-santana practices at 250 Fulton Ave Fl 1, Hempstead, NY 11550. The listed phone number is (516) 497-7520.

What is Roselia Guillen-santana's specialty?

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

Is Roselia Guillen-santana enrolled in Medicare?

Yes. Roselia Guillen-santana is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Roselia Guillen-santana's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Roselia Guillen-santana reassigns Medicare benefits to 2 organizations: Mount Sinai School Of Medicine (Hempstead, NY) and Sun River Health Inc (Bronx, NY). 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 Roselia Guillen-santana's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Roselia Guillen-santana was last updated on June 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.