Douglas Alan Horst, MD - Medicare Internal Medicine in Boston, MA

Douglas Alan Horst, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Boston, Massachusetts. He went to University Of California, San Francisco School Of Medicine and graduated in 1974 and has 50 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc, Nantucket Cottage Hospital and his current practice location is 330 Brookline Ave, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 632-8623.

Douglas Alan Horst is licensed to practice in Massachusetts (license number 39297) 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 1518957224.

Contact Information

Douglas Alan Horst, MD
330 Brookline Ave,
Boston, MA 02215-5400
(617) 632-8623
Not Available

Map and Direction




Physician's Profile

Full NameDouglas Alan Horst
GenderMale
SpecialityInternal Medicine
Experience50 Years
Location330 Brookline Ave, Boston, 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:
  • Douglas Alan Horst attended and graduated from University Of California, San Francisco School Of Medicine in 1974
  NPI Data:
  • NPI Number: 1518957224
  • Provider Enumeration Date: 10/24/2005
  • Last Update Date: 04/14/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 5890730006
  • Enrollment ID: I20050628000017

Medical Identifiers

Medical identifiers for Douglas Alan Horst such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1518957224NPI-NPPES
1194765438MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 39297 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Beth Israel Deaconess Medical CenterBoston, MAHospital
Nantucket Cottage HospitalNantucket, MAHospital
Massachusetts General HospitalBoston, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc44865671041354
Nantucket Cottage Hospital175935760164

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. Douglas Alan Horst allows following entities to bill medicare on his behalf.
Entity NameHarvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225078801
PECOS PAC ID: 4486567104
Enrollment ID: O20031204000414
Entity NameHarvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194765438
PECOS PAC ID: 4486567104
Enrollment ID: O20031204000918
Entity NameBeth Israel Deaconess Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548202641
PECOS PAC ID: 8123936119
Enrollment ID: O20041001000827
Entity NameNantucket Cottage Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1447214622
PECOS PAC ID: 1759357601
Enrollment ID: O20050104000928

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. Douglas Alan Horst 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
Douglas Alan Horst, MD
110 Francis St,
Boston, MA 02215-5501

Ph: (617) 632-8623
Douglas Alan Horst, MD
330 Brookline Ave,
Boston, MA 02215-5400

Ph: (617) 632-8623

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).

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.