Dr Marc H Harwitt, MD - Medicare Internal Medicine in Santa Monica, CA

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Dr Marc H Harwitt, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Santa Monica, California. His current practice location is 1301 20th St Ste 280, Santa Monica, California. You can reach out to his office (for appointments etc.) via phone at (310) 829-6789.

Dr Marc H Harwitt is licensed to practice in California (license number G23138) 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 1285613943.

Contact Information

Dr Marc H Harwitt, 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 Marc H Harwitt
GenderMale
SpecialityInternal Medicine - Gastroenterology
Location1301 20th St Ste 280, Santa Monica, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1285613943
  • Provider Enumeration Date: 01/11/2006
  • Last Update Date: 08/28/2020
  Medicare PECOS Information:
  • PECOS PAC ID: 3072531979
  • Enrollment ID: I20051109000723

Medical Identifiers

Medical identifiers for Dr Marc H Harwitt such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285613943NPI-NPPES
00G231380MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology G23138 (California)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. Dr Marc H Harwitt allows following entities to bill medicare on his 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 Marc H Harwitt 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 Marc H Harwitt, MD
1301 20th St 376,
Santa Monica, CA 90404-2087

Ph: (310) 829-6789		Dr Marc H Harwitt, MD
1301 20th St Ste 280,
Santa Monica, CA 90404-2053

Ph: (310) 829-6789

Reviews and Comments


Internal Medicine Doctors in Santa Monica, CA

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Dr. Colleen Lucy Channick, M.D.
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Carol Yukiko Nishikubo, M.D.
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Practice Location: 2001 Santa Monica Blvd Ste 560w, Santa Monica, CA 90404
Phone: 310-453-5654    Fax: 310-453-6885

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.