Dr Lenna Alessandra Martyak, MD - Medicare Gastroenterology in Santa Monica, CA

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Dr Lenna Alessandra Martyak, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Santa Monica, California. She went to Georgetown University School Of Medicine and graduated in 2002 and has 22 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Providence Saint Johns Medical Foundation and her current practice location is 1301 20th St Ste 280, Santa Monica, California. You can reach out to her office (for appointments etc.) via phone at (310) 829-6789.

Dr Lenna Alessandra Martyak is licensed to practice in California (license number A87515) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1164638177.

Contact Information

Dr Lenna Alessandra Martyak, MD
1301 20th St Ste 280,
Santa Monica, CA 90404-2053
(310) 829-6789
(310) 935-3163

Map and Direction




Physician's Profile

Full NameDr Lenna Alessandra Martyak
GenderFemale
SpecialityGastroenterology
Experience22 Years
Location1301 20th St Ste 280, Santa Monica, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Lenna Alessandra Martyak attended and graduated from Georgetown University School Of Medicine in 2002
  NPI Data:
  • NPI Number: 1164638177
  • Provider Enumeration Date: 05/15/2007
  • Last Update Date: 09/14/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 6800965385
  • Enrollment ID: I20080523000423

Medical Identifiers

Medical identifiers for Dr Lenna Alessandra Martyak such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1164638177NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology A87515 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Providence Saint John's Health CenterSanta monica, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Providence Saint Johns Medical Foundation0840548624273

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 Lenna Alessandra Martyak allows following entities to bill medicare on her behalf.
Entity NameSouthern California Medical Gastroenterology Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1467536409
PECOS PAC ID: 3173584273
Enrollment ID: O20041021001061
Entity NameDigestive Health Associates Of Southern California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1639604747
PECOS PAC ID: 3375806888
Enrollment ID: O20180416002250
Entity NameProvidence Saint Johns Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1518438712
PECOS PAC ID: 0840548624
Enrollment ID: O20180810000904

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 Lenna Alessandra Martyak 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 Lenna Alessandra Martyak, MD
1301 20th St 376,
Santa Monica, CA 90404-2087

Ph: (310) 829-6789		Dr Lenna Alessandra Martyak, MD
1301 20th St Ste 280,
Santa Monica, CA 90404-2053

Ph: (310) 829-6789

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.