Mark Joseph O'connor Jr, MD - Medicare Cardiovascular Disease (cardiology) in Leominster, MA

Mark Joseph O'connor Jr, MD is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in Leominster, Massachusetts. He went to University Of Massachusetts Medical School and graduated in 2012 and has 12 years of diverse experience with area of expertise as Cardiovascular Disease (cardiology). He is a member of the group practice Saint Vincent Physician Services Inc and his current practice location is 100 Hospital Rd Ste 3a-b, Leominster, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (978) 534-3179.

Mark Joseph O'connor Jr is licensed to practice in Massachusetts (license number 277574) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1215297270.

Contact Information

Mark Joseph O'connor Jr, MD
100 Hospital Rd Ste 3a-b,
Leominster, MA 01453-2253
(978) 534-3179
(978) 840-3161

Map and Direction




Physician's Profile

Full NameMark Joseph O'connor Jr
GenderMale
SpecialityCardiovascular Disease (cardiology)
Experience12 Years
Location100 Hospital Rd Ste 3a-b, Leominster, Massachusetts
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mark Joseph O'connor Jr attended and graduated from University Of Massachusetts Medical School in 2012
  NPI Data:
  • NPI Number: 1215297270
  • Provider Enumeration Date: 05/24/2012
  • Last Update Date: 05/14/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 0547486326
  • Enrollment ID: I20190530000734

Medical Identifiers

Medical identifiers for Mark Joseph O'connor Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1215297270NPI-NPPES
110103978AMedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0000XInternal Medicine - Cardiovascular Disease 277574 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Healthalliance Hospitals, IncLeominster, MAHospital
St Vincent HospitalWorcester, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Saint Vincent Physician Services Inc892105627670

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. Mark Joseph O'connor Jr allows following entities to bill medicare on his behalf.
Entity NameSaint Vincent Physician Services Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013997329
PECOS PAC ID: 8921056276
Enrollment ID: O20050104000566
Entity NameCardiology Internists Of Leominster Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982769824
PECOS PAC ID: 7911929344
Enrollment ID: O20051228000414

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. Mark Joseph O'connor Jr 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
Mark Joseph O'connor Jr, MD
100 Hospital Rd Ste 3a-b,
Leominster, MA 01453-2253

Ph: (978) 534-3179
Mark Joseph O'connor Jr, MD
100 Hospital Rd Ste 3a-b,
Leominster, MA 01453-2253

Ph: (978) 534-3179

Reviews and Comments


Internal Medicine Doctors in Leominster, MA

Paul J Block, MD
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 100 Hospital Rd, Ste 3a, Leominster, MA 01453
Phone: 978-537-9305    Fax: 978-537-9307
David J Petullo, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 60 Hospital Rd, Leominster, MA 01453
Phone: 978-466-4169    Fax: 978-466-4169
Jyoti Dhananjay Nagarkar, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 80 Erdman Way, Suite 207, Leominster, MA 01453
Phone: 978-534-0230    Fax: 978-534-3915
Binu Pathrose, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 60 Hospital Rd, Leominster, MA 01453
Phone: 978-466-4169    Fax: 978-466-4164
Dr. Min Soo Song, MD.,CM
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 105 Erdman Way, Leominster, MA 01453
Phone: 978-466-7800    Fax: 978-466-9333
Dr. Jonathan Harris Robbins, M.D.
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 100 Hospital Rd, Suite 3b, Leominster, MA 01453
Phone: 978-534-3179    Fax: 978-840-3161
Naveen C Pandaraboyina, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 50 Memorial Drive, Suite # 114, Leominster, MA 01453
Phone: 978-466-4980    Fax: 978-466-4022

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.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.