Calvin Gerald Ludwig, MD - Internal Medicine in Boston, MA

Calvin Gerald Ludwig, MD is a Internal Medicine physician based in Boston, Massachusetts. Calvin Gerald Ludwig is licensed to practice in Massachusetts (license number 3013982) and his current practice location is 800 Washington St, Boston, Massachusetts. He can be reached at his office (for appointments etc.) via phone at (617) 636-5000.

NPI number for Calvin Gerald Ludwig is 1407541485 and his current mailing address is 800 Washington St, Boston, Massachusetts. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1407541485.

Contact Information

Calvin Gerald Ludwig, MD
800 Washington St,
Boston, MA 02111-1552
(617) 636-5000
Not Available

Map and Direction




Physician's Profile

Full NameCalvin Gerald Ludwig
GenderMale
SpecialityInternal Medicine
Location800 Washington St, Boston, Massachusetts
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1407541485
  • Provider Enumeration Date: 04/06/2023
  • Last Update Date: 06/06/2023

Medical Identifiers

Medical identifiers for Calvin Gerald Ludwig such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1407541485NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 3013982 (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. Calvin Gerald Ludwig is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Calvin Gerald Ludwig, MD
800 Washington St,
Boston, MA 02111-1552

Ph: () -
Calvin Gerald Ludwig, MD
800 Washington St,
Boston, MA 02111-1552

Ph: (617) 636-5000

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.

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.