Jonathan Sylvan Williams, MD - Medicare Internal Medicine in Boston, MA

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Jonathan Sylvan Williams, MD is a medicare enrolled "Internal Medicine - Endocrinology, Diabetes & Metabolism" physician in Boston, Massachusetts. His current practice location is 221 Longwood Avenue Rfb 2, Brigham And Womens Hospital Endocrinology Diabetes And, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 732-5661.

Jonathan Sylvan Williams is licensed to practice in Massachusetts (license number 204984) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1245297936.

Contact Information

Jonathan Sylvan Williams, MD
221 Longwood Avenue Rfb 2, Brigham And Womens Hospital Endocrinology Diabetes And,
Boston, MA 02115
(617) 732-5661
Not Available

Map and Direction




Physician's Profile

Full NameJonathan Sylvan Williams
GenderMale
SpecialityInternal Medicine - Endocrinology, Diabetes & Metabolism
Location221 Longwood Avenue Rfb 2, Boston, Massachusetts
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1245297936
  • Provider Enumeration Date: 04/27/2006
  • Last Update Date: 04/12/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 8123003928
  • Enrollment ID: I20040623001479

Medical Identifiers

Medical identifiers for Jonathan Sylvan Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1245297936NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 204984 (Massachusetts)Secondary
207RE0101XInternal Medicine - Endocrinology, Diabetes & Metabolism 204984 (Massachusetts)Primary

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. Jonathan Sylvan Williams allows following entities to bill medicare on his behalf.
Entity NameSound Physicians Of Massachusetts Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1740678408
PECOS PAC ID: 2062554637
Enrollment ID: O20100120000133
Entity NameSteward Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629398219
PECOS PAC ID: 2860688728
Enrollment ID: O20101119000007
Entity NameSteward Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629398219
PECOS PAC ID: 2860688728
Enrollment ID: O20101119000332
Entity NameSteward St. Annes Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932411493
PECOS PAC ID: 3678760493
Enrollment ID: O20101206001124
Entity NameNew England Sinai Hospital A Steward Family Hospital Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851646087
PECOS PAC ID: 5193972123
Enrollment ID: O20130118000243
Entity NameBrigham & Womens Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033535497
PECOS PAC ID: 3870405988
Enrollment ID: O20150107001260
Entity NameSound Physicians Of Massachusetts Ii Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1306376397
PECOS PAC ID: 9436421567
Enrollment ID: O20170823003703

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. Jonathan Sylvan Williams 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
Jonathan Sylvan Williams, MD
221 Longwood Avenue Rfb 2, Brigham And Womens Hospital Endocrinology Diabetes And,
Boston, MA 02115

Ph: (617) 732-5661		Jonathan Sylvan Williams, MD
221 Longwood Avenue Rfb 2, Brigham And Womens Hospital Endocrinology Diabetes And,
Boston, MA 02115

Ph: (617) 732-5661

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).

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