Gregory Dennis Hollis, - Medicare Physician Assistant in Boston, MA

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Gregory Dennis Hollis, is a medicare enrolled "Physician Assistant" in Boston, Massachusetts. He graduated from nursing school in 2024 and has 2 years of diverse experience with area of expertise as Physician Assistant. He is a member of the group practice Medstar Urgent Care Llc, Unity Health Care Inc., Crescent Urgent Health Care Services, Llc, Comprehensive Primary Care And Associates Llc and his current practice location is 360 Huntington Ave, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 393-2000.

Gregory Dennis Hollis is licensed to practice in * (Not Available) (license number ) 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 1174308126.

Contact Information

Gregory Dennis Hollis,
360 Huntington Ave,
Boston, MA 02115-5005
(617) 393-2000
Not Available

Map and Direction




Provider's Profile

Full NameGregory Dennis Hollis
GenderMale
SpecialityPhysician Assistant
Experience2 Years
Location360 Huntington 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:
  • Gregory Dennis Hollis graduated from nursing school in 2024
  NPI Data:
  • NPI Number: 1174308126
  • Provider Enumeration Date: 08/29/2023
  • Last Update Date: 08/29/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 2961932967
  • Enrollment ID: I20250205003876

Medical Identifiers

Medical identifiers for Gregory Dennis Hollis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1174308126NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant (* (Not Available))Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Medstar Washington Hospital CenterWashington, DCHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Medstar Urgent Care Llc9335303155300
Unity Health Care Inc.3476647264151
Crescent Urgent Health Care Services, Llc589084302312
Comprehensive Primary Care And Associates Llc5092991984167

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. Gregory Dennis Hollis allows following entities to bill medicare on his behalf.
Entity NameUnity Health Care Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093894172
PECOS PAC ID: 3476647264
Enrollment ID: O20071024000456
Entity NameCrescent Urgent Health Care Services, LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346494234
PECOS PAC ID: 5890843023
Enrollment ID: O20090428000314
Entity NameComprehensive Primary Care and Associates LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831492586
PECOS PAC ID: 5092991984
Enrollment ID: O20110510000453
Entity NameMedstar Urgent Care LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871843409
PECOS PAC ID: 9335303155
Enrollment ID: O20130513000540

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. Gregory Dennis Hollis 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
Gregory Dennis Hollis,
2818 Pomeroy Rd Se Apt 2,
Washington, DC 20020-5929

Ph: (202) 651-1464		Gregory Dennis Hollis,
360 Huntington Ave,
Boston, MA 02115-5005

Ph: (617) 393-2000

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.