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DR. MICHAEL LIAM O'BYRNE M.D.
NPI 1891992152
Pediatrics - Pediatric Cardiology in Philadelphia, PA

Active since June 29, 2007PECOS Enrolled
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA, PHILADELPHIA, PA 19104(215) 590-1000(215) 590-2204 Get Directions Write a Review

NPPES record last updated: November 18, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Michael Liam O'byrne M.d. NPPES

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

DR. MICHAEL LIAM O'BYRNE M.D. (NPI 1891992152) is an individual pediatric cardiology provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD439352) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891992152
Entity TypeIndividualMale
Primary Taxonomy2080P0202X
Provider Legal NameDR. MICHAEL LIAM O'BYRNECredential: M.D.
Location Address3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIAPhiladelphia, PA 19104-4319
Mailing Address100 Penn Square East - North Tower, Wanamaker Bldg - 9th FloorPhiladelphia, PA 19107-3323 · (267) 425-9232 · Fax (267) 425-9299
Phone(215) 590-1000
Fax(215) 590-2204
Sole ProprietorNo
Enumeration DateJune 29, 2007
Last NPPES UpdateNovember 18, 2013
✔ NPI 1891992152 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric CardiologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0202X
License✔ Licensed in PA · MD439352
Definition
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.
3401 CIVIC CENTER BLVD, Philadelphia, PA 19104
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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. Michael Liam O'byrne 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 Michael O'byrne reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Childrens Health Care Associates, Inc
Same address
Neurology
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA
Philadelphia, PA 19104
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 1,225 clinicians in this Medicare group
NPI 1033204086 (215) 590-1000
Children's Hospital
120 mi
Pediatrics
111 MICHIGAN AVE NW
Washington, DC 20010
  • Reassigned Medicare billing, District of Columbia enrollment
  • 1,417 clinicians in this Medicare group
NPI 1780800128 (202) 476-5000

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

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.

AARON DORFMAN M.D.
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - CARDIOLOGY
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-4040
MS. NICOLE MARIE KOEPKE CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - EMERGENCY MED
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1944
DR. CASSANDRA ALYS LIGH MD
Surgery (Plastic and Reconstructive Surgery)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-2208
DR. PREETI SOI
Psychiatry & Neurology (Child & Adolescent Psychiatry)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-7555
ROSALIND USHER M.D.
Pediatrics (Developmental - Behavioral Pediatrics)
3401 CIVIC CENTER BLVD, DIVISION OF DEVELOPMENTAL AND BEHAVIORAL PEDIATRICS
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-6336
DR. MATTHEW DAVID SCHREIER MD
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
DR. TERRENCE CALDWELL JR. PHARMD
Pharmacist (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
ALYSSA STIEFEL CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000

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 Michael O'byrne's NPI number?

The NPI number for Michael O'byrne is 1891992152. It was assigned to this individual provider in the NPPES registry on June 29, 2007.

Where is Michael O'byrne located?

Michael O'byrne practices at 3401 Civic Center Blvd Children's Hospital Of Philadelphia, Philadelphia, PA 19104. The listed phone number is (215) 590-1000.

What is Michael O'byrne's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Is Michael O'byrne enrolled in Medicare?

Yes. Michael O'byrne is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Michael O'byrne's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael O'byrne reassigns Medicare benefits to 2 organizations: Childrens Health Care Associates, Inc (Philadelphia, PA) and Children's Hospital (Washington, DC). 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 Michael O'byrne'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 Michael O'byrne was last updated on November 18, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.