Dr William L Diehl, MD - Medicare General Surgery in Livingston, NJ

Dr William L Diehl, MD is a medicare enrolled "Surgery - Surgical Oncology" physician in Livingston, New Jersey. He graduated from medical school in 1981 and has 43 years of diverse experience with area of expertise as General Surgery. He is a member of the group practice Summit Medical Group Pa and his current practice location is 75 E Northfield Rd, Livingston, New Jersey. You can reach out to his office (for appointments etc.) via phone at (973) 436-1530.

Dr William L Diehl is licensed to practice in New Jersey (license number 25MA04355800) 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 1629068457.

Contact Information

Dr William L Diehl, MD
75 E Northfield Rd,
Livingston, NJ 07039-4532
(973) 436-1530
(973) 422-0414

Map and Direction




Physician's Profile

Full NameDr William L Diehl
GenderMale
SpecialityGeneral Surgery
Experience43 Years
Location75 E Northfield Rd, Livingston, New Jersey
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:
  • Dr William L Diehl graduated from medical school in 1981
  NPI Data:
  • NPI Number: 1629068457
  • Provider Enumeration Date: 10/24/2005
  • Last Update Date: 04/24/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 7113962267
  • Enrollment ID: I20050621000068

Medical Identifiers

Medical identifiers for Dr William L Diehl such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1629068457NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208600000XSurgery 25MA04355800 (New Jersey)Secondary
2086X0206XSurgery - Surgical Oncology 25MA04355800 (New Jersey)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Morristown Medical CenterMorristown, NJHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Summit Medical Group Pa53956422761253

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 L Diehl allows following entities to bill medicare on his behalf.
Entity NameSummit Medical Group Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1942254347
PECOS PAC ID: 5395642276
Enrollment ID: O20031218000011

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 L Diehl 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 L Diehl, MD
261 James St, Suite 2g,
Morristown, NJ 07960-6392

Ph: (973) 267-6400
Dr William L Diehl, MD
75 E Northfield Rd,
Livingston, NJ 07039-4532

Ph: (973) 436-1530

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).

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