William Harrison Mcallister, MD - Medicare Pediatric Medicine in Charleston, SC

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William Harrison Mcallister, MD is a medicare enrolled "Pediatrics" physician in Charleston, South Carolina. He graduated from medical school in 2021 and has 5 years of diverse experience with area of expertise as Pediatric Medicine. His current practice location is 169 Ashley Avenue, Room 202 Main Hospital Msc333, Charleston, South Carolina. You can reach out to his office (for appointments etc.) via phone at (843) 792-9570.

William Harrison Mcallister is licensed to practice in South Carolina (license number 91777) 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 1194305292.

Contact Information

William Harrison Mcallister, MD
169 Ashley Avenue, Room 202 Main Hospital Msc333,
Charleston, SC 29425
(843) 792-9570
Not Available

Map and Direction




Physician's Profile

Full NameWilliam Harrison Mcallister
GenderMale
SpecialityPediatric Medicine
Experience5 Years
Location169 Ashley Avenue, Charleston, South Carolina
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:
  • William Harrison Mcallister graduated from medical school in 2021
  NPI Data:
  • NPI Number: 1194305292
  • Provider Enumeration Date: 04/12/2021
  • Last Update Date: 11/03/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 6901207877
  • Enrollment ID: I20251211002824

Medical Identifiers

Medical identifiers for William Harrison Mcallister such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194305292NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics 57.251574 (Ohio)Secondary
208M00000XHospitalist 91777 (South Carolina)Secondary
208000000XPediatrics 91777 (South Carolina)Primary
390200000XStudent In An Organized Health Care Education/training Program (* (Not Available))Secondary

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. William Harrison Mcallister allows following entities to bill medicare on his behalf.
Entity NameBon Secours St Francis Xavier Hospital Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1740502822
PECOS PAC ID: 8325008717
Enrollment ID: O20100607000884

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. William Harrison Mcallister 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
William Harrison Mcallister, MD
169 Ashley Ave,
Charleston, SC 29425-8905

Ph: Not Available		William Harrison Mcallister, MD
169 Ashley Avenue, Room 202 Main Hospital Msc333,
Charleston, SC 29425

Ph: (843) 792-9570

Reviews and Comments


Pediatrics Doctors in Charleston, SC

Andrew M Atz, MD
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 171 Ashley Ave, Charleston, SC 29425
Phone: 843-792-1414    
Dr. Savanna Gilhooly Dincman, MD, MPH
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 171 Ashley Ave, Charleston, SC 29425
Phone: 843-792-1414    
Dr. Kelly Michelle Roelf, MD
Pediatrics
Medicare: Accepting Medicare Assignments
Practice Location: 125 Doughty Street, Msc 561, Charleston, SC 29403
Phone: 310-929-0627    
Jason Robert Buckley, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 171 Ashley Ave, Charleston, SC 29425
Phone: 843-792-1414    
Elizabeth Emrath Zivick, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 171 Ashley Ave, Charleston, SC 29425
Phone: 843-792-1414    
Elizabeth Mary Wallis, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 171 Ashley Ave, Charleston, SC 29425
Phone: 843-792-1414    
Hannah Elizabeth Pressler,
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 169 Ashley Ave, Charleston, SC 29425
Phone: 843-754-7275    

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).

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