Lawrence Callahan, MD - Medicare Internal Medicine in Littlestown, PA

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Lawrence Callahan, MD is a medicare enrolled "Internal Medicine" physician in Littlestown, Pennsylvania. His current practice location is 300 W King St, Littlestown, Pennsylvania. You can reach out to his office (for appointments etc.) via phone at (717) 359-9214.

Lawrence Callahan is licensed to practice in Pennsylvania (license number MD038890L) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1669511259.

Contact Information

Lawrence Callahan, MD
300 W King St,
Littlestown, PA 17340
(717) 359-9214
(717) 359-8120

Map and Direction




Physician's Profile

Full NameLawrence Callahan
GenderMale
SpecialityInternal Medicine
Location300 W King St, Littlestown, Pennsylvania
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1669511259
  • Provider Enumeration Date: 02/06/2007
  • Last Update Date: 08/07/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 7911182837
  • Enrollment ID: I20110419000568

Medical Identifiers

Medical identifiers for Lawrence Callahan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1669511259NPI-NPPES
0043373000MedicaidWV

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine MD038890L (Pennsylvania)Primary

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. Lawrence Callahan allows following entities to bill medicare on his behalf.
Entity NamePinnacle Health Medical Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932143427
PECOS PAC ID: 7618960493
Enrollment ID: O20040407000180
Entity NameCenterville Clinics Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801877048
PECOS PAC ID: 7214837202
Enrollment ID: O20040427000681

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. Lawrence Callahan 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
Lawrence Callahan, MD
409 S 2nd St Ste 2f,
Harrisburg, PA 17104-1612

Ph: (717) 231-8932		Lawrence Callahan, MD
300 W King St,
Littlestown, PA 17340

Ph: (717) 359-9214

Reviews and Comments


Internal Medicine Doctors in Littlestown, PA


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.