Dr Frederick W Ruymann, MD - Medicare Gastroenterology in Cambridge, MA

Dr Frederick W Ruymann, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Cambridge, Massachusetts. He went to Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University and graduated in 1987 and has 37 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Medical Affiliates Of Cape Cod Inc and his current practice location is 300 Mount Auburn St, Ste 405, Cambridge, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 661-0221.

Dr Frederick W Ruymann is licensed to practice in Massachusetts (license number 71422) 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 1568466316.

Contact Information

Dr Frederick W Ruymann, MD
300 Mount Auburn St, Ste 405,
Cambridge, MA 02138-5665
(617) 661-0221
(617) 661-3862

Map and Direction




Physician's Profile

Full NameDr Frederick W Ruymann
GenderMale
SpecialityGastroenterology
Experience37 Years
Location300 Mount Auburn St, Cambridge, 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 Frederick W Ruymann attended and graduated from Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University in 1987
  NPI Data:
  • NPI Number: 1568466316
  • Provider Enumeration Date: 06/09/2005
  • Last Update Date: 01/11/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 2961459573
  • Enrollment ID: I20050406000259

Medical Identifiers

Medical identifiers for Dr Frederick W Ruymann such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1568466316NPI-NPPES
3052788MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 71422 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Cape Cod HealthcareHyannis, MAHospital
Falmouth HospitalFalmouth, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Medical Affiliates Of Cape Cod Inc3577471564187

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 Frederick W Ruymann allows following entities to bill medicare on his behalf.
Entity NameMedical Affiliates Of Cape Cod Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770534927
PECOS PAC ID: 3577471564
Enrollment ID: O20040510001010

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 Frederick W Ruymann 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 Frederick W Ruymann, MD
300 Mount Auburn St, Ste 405,
Cambridge, MA 02138-5502

Ph: (617) 661-0221
Dr Frederick W Ruymann, MD
300 Mount Auburn St, Ste 405,
Cambridge, MA 02138-5665

Ph: (617) 661-0221

Reviews and Comments


Internal Medicine Doctors in Cambridge, MA

Yun- Ting Eric Yeh, M.D.
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Dr. Ayse A. Atasoylu, M.D., M.P.H.
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Dr. Alexandra Vania Chabrerie, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 330 Mount Auburn Street, Department Of Medicine, Cambridge, MA 02138
Phone: 617-492-3500    

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.