Catherine O'neill Buck, MD - Medicare Pediatrics in New Haven, CT

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Catherine O'neill Buck, MD is a medicare enrolled "Pediatrics - Neonatal-perinatal Medicine" physician in New Haven, Connecticut. Her current practice location is 1 Park St, New Haven, Connecticut. You can reach out to her office (for appointments etc.) via phone at (401) 274-1122.

Catherine O'neill Buck is licensed to practice in Connecticut (license number 62689) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1437425402.

Contact Information

Catherine O'neill Buck, MD
1 Park St,
New Haven, CT 06504-8901
(401) 274-1122
Not Available

Map and Direction




Physician's Profile

Full NameCatherine O'neill Buck
GenderFemale
SpecialityPediatrics - Neonatal-perinatal Medicine
Location1 Park St, New Haven, Connecticut
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1437425402
  • Provider Enumeration Date: 03/23/2012
  • Last Update Date: 04/29/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 8921328840
  • Enrollment ID: I20190606000574

Medical Identifiers

Medical identifiers for Catherine O'neill Buck such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437425402NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics MD15391 (Rhode Island)Secondary
208000000XPediatrics Q0881 (Texas)Secondary
2080N0001XPediatrics - Neonatal-perinatal Medicine 62689 (Connecticut)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Catherine O'neill Buck allows following entities to bill medicare on her behalf.
Entity NameYale University
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205822236
PECOS PAC ID: 9436061736
Enrollment ID: O20031105000015

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Catherine O'neill Buck is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Catherine O'neill Buck, MD
1 Park St,
New Haven, CT 06504-8901

Ph: (203) 785-4081		Catherine O'neill Buck, MD
1 Park St,
New Haven, CT 06504-8901

Ph: (401) 274-1122

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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