Dr Mark Philip Eisenberg, MD - Medicare Internal Medicine in Fruit St, MA

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Dr Mark Philip Eisenberg, MD is a medicare enrolled "Internal Medicine" physician in Fruit St, Massachusetts. He went to Harvard Medical School and graduated in 1980 and has 44 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Massachusetts General Physicians Organization Inc, The General Hospital Corporation and his current practice location is 15 Fruit St, Mgh, Fruit St, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 724-8135.

Dr Mark Philip Eisenberg is licensed to practice in Massachusetts (license number 54761) 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 1487628418.

Contact Information

Dr Mark Philip Eisenberg, MD
15 Fruit St, Mgh,
Fruit St, MA 02114-3026
(617) 724-8135
(617) 724-8010

Map and Direction




Physician's Profile

Full NameDr Mark Philip Eisenberg
GenderMale
SpecialityInternal Medicine
Experience44 Years
Location15 Fruit St, Fruit St, 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:
  • Dr Mark Philip Eisenberg attended and graduated from Harvard Medical School in 1980
  NPI Data:
  • NPI Number: 1487628418
  • Provider Enumeration Date: 02/15/2006
  • Last Update Date: 09/23/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8325036510
  • Enrollment ID: I20040505000970

Medical Identifiers

Medical identifiers for Dr Mark Philip Eisenberg such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1487628418NPI-NPPES
054761OtherMATUFTS HEALTH PLAN
3013103MedicaidMA
J05654OtherMABCBS MA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RA0401XInternal Medicine - Addiction Medicine 54761 (Massachusetts)Secondary
207RI0200XInternal Medicine - Infectious Disease 54761 (Massachusetts)Secondary
207R00000XInternal Medicine 54761 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Massachusetts General HospitalBoston, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Massachusetts General Physicians Organization Inc24663658203084
The General Hospital Corporation65078038061058

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. Dr Mark Philip Eisenberg allows following entities to bill medicare on his behalf.
Entity NameMassachusetts General Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801874573
PECOS PAC ID: 2466365820
Enrollment ID: O20031111000434
Entity NameThe General Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023049236
PECOS PAC ID: 6507803806
Enrollment ID: O20080313000351
Entity NameBoston Health Care For The Homeless Program, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033157771
PECOS PAC ID: 2668475419
Enrollment ID: O20110527000309

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. Dr Mark Philip Eisenberg 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
Dr Mark Philip Eisenberg, MD
Po Box 9142, Mass General Physician Organization,
Charlestown, MA 02129-9142

Ph: (617) 724-8135		Dr Mark Philip Eisenberg, MD
15 Fruit St, Mgh,
Fruit St, MA 02114-3026

Ph: (617) 724-8135

Reviews and Comments


Internal Medicine Doctors in Fruit St, MA


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.