Mark D Johnson, MD PHD - Medicare Neurosurgery in Worcester, MA

Mark D Johnson, MD PHD is a medicare enrolled "Neurological Surgery" physician in Worcester, Massachusetts. He went to Harvard Medical School and graduated in 1995 and has 29 years of diverse experience with area of expertise as Neurosurgery. He is a member of the group practice Umass Memorial Medical Group Inc and his current practice location is 55 Lake Ave N, Worcester, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 856-2963.

Mark D Johnson is licensed to practice in Massachusetts (license number 217384) 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 1578501797.

Contact Information

Mark D Johnson, MD PHD
55 Lake Ave N,
Worcester, MA 01655-0002
(508) 856-2963
Not Available

Map and Direction




Physician's Profile

Full NameMark D Johnson
GenderMale
SpecialityNeurosurgery
Experience29 Years
Location55 Lake Ave N, Worcester, 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 D Johnson attended and graduated from Harvard Medical School in 1995
  NPI Data:
  • NPI Number: 1578501797
  • Provider Enumeration Date: 06/02/2006
  • Last Update Date: 10/26/2020
  Medicare PECOS Information:
  • PECOS PAC ID: 9638353360
  • Enrollment ID: I20110405000263

Medical Identifiers

Medical identifiers for Mark D Johnson such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1578501797NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207T00000XNeurological Surgery 217384 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Umass Memorial Medical Center/university CampusWorcester, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Umass Memorial Medical Group Inc42845398911898

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 D Johnson allows following entities to bill medicare on his behalf.
Entity NameBrigham & Womens Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093733537
PECOS PAC ID: 3870405988
Enrollment ID: O20031211000800
Entity NameUmass Memorial Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760445373
PECOS PAC ID: 4284539891
Enrollment ID: O20040113000267
Entity NameBrigham & Womens Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033535497
PECOS PAC ID: 3870405988
Enrollment ID: O20150107001260

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 D Johnson 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 D Johnson, MD PHD
Po Box 415348,
Boston, MA 02241-5348

Ph: () -
Mark D Johnson, MD PHD
55 Lake Ave N,
Worcester, MA 01655-0002

Ph: (508) 856-2963

Reviews and Comments


Neurological Surgery Doctors in Worcester, MA

Dr. Stephen M Gutting, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-0605    
Oguz I Cataltepe, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Department Of Neurosurgery, Worcester, MA 01655
Phone: 508-334-0605    Fax: 508-856-5074
Dr. Madhav Sukumaran, MD, PHD
Neurological Surgery
Medicare: Medicare Enrolled
Practice Location: 55 Lake Avenue North, Worcester, MA 01655
Phone: 508-334-0605    
Frederik A Pennings, M.D., PHD
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 119 Belmont St, Worcester, MA 01605
Phone: 508-334-1886    Fax: 508-334-9769
Richard P Moser, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Department Of Surgery, Worcester, MA 01655
Phone: 508-334-0605    Fax: 508-856-5074
Arno S. Sungarian, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 67 Belmont St, Worcester, MA 01605
Phone: 508-752-6381    Fax: 508-795-0407
Farid Hamzei-sichani,
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-0605    Fax: 508-856-5074

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.