Wassim Assaf, MD - Medicare Sleep Medicine in Auburn, MA

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Wassim Assaf, MD is a medicare enrolled "Internal Medicine - Sleep Medicine" physician in Auburn, Massachusetts. He graduated from medical school in 2004 and has 20 years of diverse experience with area of expertise as Sleep Medicine. He is a member of the group practice Henry Heywood Memorial Hospital and his current practice location is 48 Auburn St Ste 1, Auburn, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (774) 772-7058.

Wassim Assaf is licensed to practice in Massachusetts (license number 265574) 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 1548400278.

Contact Information

Wassim Assaf, MD
48 Auburn St Ste 1,
Auburn, MA 01501-2438
(774) 772-7058
(774) 772-7059

Map and Direction




Physician's Profile

Full NameWassim Assaf
GenderMale
SpecialitySleep Medicine
Experience20 Years
Location48 Auburn St Ste 1, Auburn, 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:
  • Wassim Assaf graduated from medical school in 2004
  NPI Data:
  • NPI Number: 1548400278
  • Provider Enumeration Date: 02/20/2009
  • Last Update Date: 02/03/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 1254501430
  • Enrollment ID: I20180508002298

Medical Identifiers

Medical identifiers for Wassim Assaf such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1548400278NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 265574 (Massachusetts)Secondary
207RS0012XInternal Medicine - Sleep Medicine 265574 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Heywood Hospital -Gardner, MAHospital
Athol Memorial HospitalAthol, MAHospital

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. Wassim Assaf allows following entities to bill medicare on his behalf.
Entity NameHenry Heywood Memorial Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205823879
PECOS PAC ID: 1658262605
Enrollment ID: O20040322000360
Entity NameAthol Memorial Hospital Incorporated
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336120047
PECOS PAC ID: 7911959846
Enrollment ID: O20050218000228
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 NameSound Physicians Of Massachusetts Ii Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1306376397
PECOS PAC ID: 9436421567
Enrollment ID: O20170823003703
Entity NameHospitalist Medicine Physicians Of Massachusetts - Worcester, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538648670
PECOS PAC ID: 5799035887
Enrollment ID: O20180911003318
Entity NameAssaf Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1841760295
PECOS PAC ID: 6608113188
Enrollment ID: O20190122001552

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. Wassim Assaf 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
Wassim Assaf, MD
Po Box 415348,
Boston, MA 02241-5348

Ph: (800) 225-8885		Wassim Assaf, MD
48 Auburn St Ste 1,
Auburn, MA 01501-2438

Ph: (774) 772-7058

Reviews and Comments


Internal Medicine Doctors in Auburn, MA

Dr. Hesham M. A. Hammouda, M.D.
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Phone: 508-721-4100    Fax: 508-721-4124
Dr. Rekha Hari Nair, M.D.
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Chloe Sihua Deng, D.O.
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Steven R Rozak, M.D.
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Phone: 508-832-9646    Fax: 508-832-7862
Lauren Needell, DO
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Practice Location: 489 Washington St, Auburn, MA 01501
Phone: 508-832-9646    Fax: 508-832-7862
Putcha R Murthy, MD
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Practice Location: 385 Southbridge St, Auburn, MA 01501
Phone: 508-721-1170    Fax: 508-832-0859

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.