Dr Lawrence P Gassner, MD - Medicare Internal Medicine in Phoenix, AZ

Dr Lawrence P Gassner, MD is a medicare enrolled "Internal Medicine" physician in Phoenix, Arizona. He went to Washington University School Of Medicine and graduated in 1988 and has 36 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Tatum Ridge Internal Medicine Plc and his current practice location is 18404 N Tatum Blvd, Ste 205, Phoenix, Arizona. You can reach out to his office (for appointments etc.) via phone at (602) 971-5500.

Dr Lawrence P Gassner is licensed to practice in Arizona (license number 19150) 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 1558379461.

Contact Information

Dr Lawrence P Gassner, MD
18404 N Tatum Blvd, Ste 205,
Phoenix, AZ 85032-1509
(602) 971-5500
(602) 944-0504

Map and Direction




Physician's Profile

Full NameDr Lawrence P Gassner
GenderMale
SpecialityInternal Medicine
Experience36 Years
Location18404 N Tatum Blvd, Phoenix, Arizona
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 Lawrence P Gassner attended and graduated from Washington University School Of Medicine in 1988
  NPI Data:
  • NPI Number: 1558379461
  • Provider Enumeration Date: 08/04/2006
  • Last Update Date: 03/22/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 4688668403
  • Enrollment ID: I20100325000647

Medical Identifiers

Medical identifiers for Dr Lawrence P Gassner such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1558379461NPI-NPPES
110213982OtherRR MEDICARE ID
19150OtherAZLICENSE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 19150 (Arizona)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Tatum Ridge Internal Medicine Plc69018908213

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 Lawrence P Gassner allows following entities to bill medicare on his behalf.
Entity NameTatum Ridge Internal Medicine Plc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1083622997
PECOS PAC ID: 6901890821
Enrollment ID: O20040413001423

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 Lawrence P Gassner 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 Lawrence P Gassner, MD
18404 N Tatum Blvd, Ste 205,
Phoenix, AZ 85032-1509

Ph: (602) 971-5500
Dr Lawrence P Gassner, MD
18404 N Tatum Blvd, Ste 205,
Phoenix, AZ 85032-1509

Ph: (602) 971-5500

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.