Dr William O Hartzell, MD - Medicare Pulmonary Disease in Westborough, MA

Dr William O Hartzell, MD is a medicare enrolled "Internal Medicine - Pulmonary Disease" physician in Westborough, Massachusetts. He went to University Of Virginia School Of Medicine and graduated in 1992 and has 32 years of diverse experience with area of expertise as Pulmonary Disease. His current practice location is 150 Flanders Rd, Westborough, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 871-2000.

Dr William O Hartzell is licensed to practice in Virginia (license number 0101239857) and he also participates in the medicare program. He may accept medicare assignments (which means he may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance) and his NPI Number is 1417938986.

Contact Information

Dr William O Hartzell, MD
150 Flanders Rd,
Westborough, MA 01581-1017
(508) 871-2000
Not Available

Map and Direction




Physician's Profile

Full NameDr William O Hartzell
GenderMale
SpecialityPulmonary Disease
Experience32 Years
Location150 Flanders Rd, Westborough, Massachusetts
Accepts Medicare AssignmentsMay be. He may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William O Hartzell attended and graduated from University Of Virginia School Of Medicine in 1992
  NPI Data:
  • NPI Number: 1417938986
  • Provider Enumeration Date: 11/10/2005
  • Last Update Date: 02/18/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 9830172188
  • Enrollment ID: I20061025000541

Medical Identifiers

Medical identifiers for Dr William O Hartzell such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1417938986NPI-NPPES
0164861MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RP1001XInternal Medicine - Pulmonary Disease 0101239857 (Virginia)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Inova Fair Oaks HospitalFairfax, VAHospital
Inova Fairfax HospitalFalls church, VAHospital

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 William O Hartzell allows following entities to bill medicare on his behalf.
Entity NameFairfax Lung Center Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1790951994
PECOS PAC ID: 3779648704
Enrollment ID: O20090209000030

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 William O Hartzell 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 William O Hartzell, MD
Po Box 62, Turnpike Station,
Shrewsbury, MA 01545-0062

Ph: (508) 334-8815
Dr William O Hartzell, MD
150 Flanders Rd,
Westborough, MA 01581-1017

Ph: (508) 871-2000

Reviews and Comments


Internal Medicine Doctors in Westborough, MA

Dr. Nandana Kansra, M.D.
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Ninad N Samant, MD
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Dr. John B Mccahan, M.D.
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Phone: 508-836-4884    Fax: 508-836-3351
Dr. Gordon S Manning, M.D.
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Practice Location: 154 E Main St, Suite 101, Westborough, MA 01581
Phone: 508-366-1120    
Matthew K Bonner, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 19 Overlook Dr, Westborough, MA 01581
Phone: 508-366-8734    

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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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