Timothy J Ernst, MD - Medicare Medical Oncology in Natick, MA

Timothy J Ernst, MD is a medicare enrolled "Internal Medicine - Medical Oncology" physician in Natick, Massachusetts. He went to University Of Nebraska College Of Medicine and graduated in 1980 and has 44 years of diverse experience with area of expertise as Medical Oncology. He is a member of the group practice Newton-wellesley Medical Group, Inc., Massachusetts General Physicians Organization Inc, The General Hospital Corporation and his current practice location is 67 Union St, Suite 206, Natick, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 655-0065.

Timothy J Ernst is licensed to practice in Massachusetts (license number 52630) 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 1972542975.

Contact Information

Timothy J Ernst, MD
67 Union St, Suite 206,
Natick, MA 01760-7700
(508) 655-0065
Not Available

Map and Direction




Physician's Profile

Full NameTimothy J Ernst
GenderMale
SpecialityMedical Oncology
Experience44 Years
Location67 Union St, Natick, 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:
  • Timothy J Ernst attended and graduated from University Of Nebraska College Of Medicine in 1980
  NPI Data:
  • NPI Number: 1972542975
  • Provider Enumeration Date: 06/05/2006
  • Last Update Date: 06/13/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 6002855673
  • Enrollment ID: I20050503000571

Medical Identifiers

Medical identifiers for Timothy J Ernst such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1972542975NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RX0202XInternal Medicine - Medical Oncology 52630 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Massachusetts General HospitalBoston, MAHospital
Newton-wellesley HospitalNewton, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Newton-wellesley Medical Group, Inc.0244133494395
Massachusetts General Physicians Organization Inc24663658203085
The General Hospital Corporation65078038061054

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. Timothy J Ernst allows following entities to bill medicare on his behalf.
Entity NameMassachusetts General Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801874573
PECOS PAC ID: 2466365820
Enrollment ID: O20031111000434
Entity NameNewton-wellesley Medical Group, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538191218
PECOS PAC ID: 0244133494
Enrollment ID: O20040127001012
Entity NameThe General Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023049236
PECOS PAC ID: 6507803806
Enrollment ID: O20080313000351

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. Timothy J Ernst 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
Timothy J Ernst, MD
67 Union St, Suite 206,
Natick, MA 01760-7700

Ph: (508) 655-0065
Timothy J Ernst, MD
67 Union St, Suite 206,
Natick, MA 01760-7700

Ph: (508) 655-0065

Reviews and Comments


Internal Medicine Doctors in Natick, MA

Wendy J. Parker, M.D.
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Phone: 508-820-8383    Fax: 508-820-0250
Dr. Simone Mordas, MD
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Practice Location: 192 Worcester Rd, Natick, MA 01760
Phone: 508-647-1040    Fax: 508-647-1080
Trista N Repassy, M.D.
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Practice Location: 190 N Main St, First Floor, Natick, MA 01760
Phone: 508-655-2555    Fax: 508-655-2596
Dr. Dainius Juknelis, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 67 Union St Ste 407, Natick, MA 01760
Phone: 508-881-3029    Fax: 508-650-9413
Dr. Lawrence Handler, M.D.
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Medicare: May Accept Medicare Assignments
Practice Location: 67 Union St, Suite 201, Natick, MA 01760
Phone: 508-651-1998    Fax: 508-651-2587
Dr. Deborah Hope Markowitz, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 67 Union St, Natick, MA 01760
Phone: 508-650-7432    Fax: 508-650-7883
Dr. Leslie Gerald Selbovitz, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 11 Morgan Dr, Unit 205, Natick, MA 01760
Phone: 617-899-9334    

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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.

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