Mark J O'connor, MD in Leominster, MA

Mark J O'connor, MD is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in Leominster, Massachusetts. His current practice location is 100 Hospital Rd, Leominster, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (978) 466-2052.

Mark J O'connor 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 J O'connor, MD
	100 Hospital Rd, Leominster, MA 01453-2253
	(978) 466-2052
	(978) 466-2085

Map and Direction

Physician's Profile

Full Name	Mark J O'connor
Gender	Male
Speciality
Experience	Years
Location	100 Hospital Rd, Leominster, Massachusetts
Accepts Medicare Assignments	Yes. 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 J O'connor attended and graduated from in

NPI Data:

NPI Number: 1215297270
Provider Enumeration Date: 05/24/2012
Last Update Date: 09/10/2025

Medicare PECOS Information:

PECOS PAC ID:
Enrollment ID:

Medical Identifiers

Medical identifiers for Mark J O'connor such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1215297270	NPI	-	NPPES
110103978A	Medicaid	MA

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RC0000X	Internal Medicine - Cardiovascular Disease	277574 (Massachusetts)	Primary

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 J O'connor 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 Address	Practice Location Address
Mark J O'connor, MD Po Box 415348, Boston, MA 02241-5348 Ph: (800) 225-8885	Mark J O'connor, MD 100 Hospital Rd, Leominster, MA 01453-2253 Ph: (978) 466-2052

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

Mark J O'connor, MD - Medicare in Leominster, MA