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GUILLERMO DAVID ALFONSO JR. DO
NPI 1124588561
Radiology - Pediatric Radiology in Cincinnati, OH

Active since March 21, 2019PECOS EnrolledAccepts Medicare Assignment
3333 BURNET AVE, CINCINNATI, OH 45229(513) 636-4200 Get Directions Write a Review

NPPES record last updated: August 26, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jun 5, 2025, Mar 21, 2019 (2 updates tracked since 2019).

About Guillermo David Alfonso Jr. Do NPPES

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

GUILLERMO DAVID ALFONSO JR. DO (NPI 1124588561) is an individual pediatric radiology provider in Cincinnati, Ohio, licensed in Ohio (34.017009) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Cincinnati Children's Hospital Medical Center, and maintains a secondary practice location in Lexington.

NPPES Registry Identity

NPI1124588561
Entity TypeIndividualMale
Primary Taxonomy2085P0229X
Provider Legal NameGUILLERMO DAVID ALFONSO JR.Credential: DO
Location Address3333 BURNET AVECincinnati, OH 45229-3026
Mailing Address3333 Burnet Ave, Ml 5031Cincinnati, OH 45229-3026 · (513) 636-4200
Phone(513) 636-4200
Sole ProprietorNo
Medical School CMSEdward Via Col Of Osteo Medicine-carolinas CampusGraduated 2019
Enumeration DateMarch 21, 2019
Last NPPES UpdateAugust 26, 20252 updates tracked since enumeration
NPPES CertifiedAugust 26, 2025
✔ NPI 1124588561 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Pediatric RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085P0229X
Licenses✔ Licensed in OH · 34.017009✔ Licensed in KY · TP522
Definition
A radiologist who is proficient in all forms of diagnostic imaging as it pertains to the treatment of diseases in the newborn, infant, child and adolescent. This specialist has knowledge of both imaging and interventional procedures related to the care and management of diseases of children. A pediatric radiologist must be highly knowledgeable of all organ systems as they relate to growth and development, congenital malformations, diseases peculiar to infants and children and diseases that begin in childhood but cause substantial residual impairment in adulthood.
3333 BURNET AVE, Cincinnati, OH 45229
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Secondary Practice Location 1

Location 1800 Rose StLexington, KY 40536-3026 · Phone (859) 323-2222 · Fax (859) 323-5090

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Guillermo David Alfonso Jr. Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3870916919
PECOS Enrollment IDI20250829000173
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 Guillermo Alfonso reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Children's Hospital Medical Center
Same address
Pediatrics
3333 BURNET AVENUE
Cincinnati, OH 45229
  • Reassigned Medicare billing, Ohio enrollment
  • 2,080 clinicians in this Medicare group
NPI 1609915784 (513) 636-4225
University Of Kentucky
75 mi
Dentist
740 S LIMESTONE ST
Lexington, KY 40536
  • Reassigned Medicare billing, Kentucky enrollment
  • 1,761 clinicians in this Medicare group
NPI 1730225129 (859) 257-3462

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

OwnershipVoluntary non-profit - Private
CMS Certification Number363300
Location3333 Burnet AvenueCincinnati, OH 45229 · Hamilton County
Emergency services

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.

PREEYACHA PACHARN M.D.
Radiology (Pediatric Radiology)
3333 BURNET AVE, ML 5031
CINCINNATI, OH 45229
Hamilton County (513) 636-4251
BRIAN KEITH TURPIN D.O.
Pediatrics (Pediatric Hematology-Oncology)
3333 BURNET AVE
CINCINNATI, OH 45229
Hamilton County (513) 636-3381
ETHAN J MUSGRAVE M.D.
Psychiatry & Neurology (Child & Adolescent Psychiatry)
3333 BURNET AVE, ML 3014
CINCINNATI, OH 45229
Hamilton County (513) 636-4788
KATHRYN WEAVER M.D.
Medical Genetics (Clinical Genetics (M.D.))
3333 BURNET AVE, ML 4006
CINCINNATI, OH 45229
Hamilton County (513) 636-4760
ROBIN T COTTON, MD, INC
Otolaryngology (Pediatric Otolaryngology)
3333 BURNET AVE, MLC 2018
CINCINNATI, OH 45229
Hamilton County (513) 636-7138
ELIZABETH ANN MOORE CNP
Nurse Practitioner (Acute Care)
3333 BURNET AVE, ML 2003
CINCINNATI, OH 45229
Hamilton County (513) 636-4432
CONSTANCE MARIE MARTIN CNP
Nurse Practitioner (Primary Care)
3333 BURNET AVE, ML 2018
CINCINNATI, OH 45229
Hamilton County (513) 636-4355
EMILY RENAE LY LSW
Case Manager/Care Coordinator
3333 BURNET AVE
CINCINNATI, OH 45229
Hamilton County (513) 803-6316

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 Guillermo Alfonso's NPI number?

The NPI number for Guillermo Alfonso is 1124588561. It was assigned to this individual provider in the NPPES registry on March 21, 2019.

Where is Guillermo Alfonso located?

Guillermo Alfonso practices at 3333 Burnet Ave, Cincinnati, OH 45229. The listed phone number is (513) 636-4200.

What is Guillermo Alfonso's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Pediatric Radiology, with taxonomy code 2085P0229X.

Is Guillermo Alfonso enrolled in Medicare?

Yes. Guillermo Alfonso is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Guillermo Alfonso's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Alfonso reassigns Medicare benefits to 2 organizations: Children's Hospital Medical Center (Cincinnati, OH) and University Of Kentucky (Lexington, KY). 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 Guillermo Alfonso's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Guillermo Alfonso affiliated with any hospitals?

According to CMS data, Guillermo Alfonso is affiliated with Cincinnati Children's Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Guillermo Alfonso was last updated on August 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.