Dr Lawrence Posner, MD - Medicare Internal Medicine in Sausalito, CA

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Dr Lawrence Posner, MD is a medicare enrolled "Internal Medicine" physician in Sausalito, California. His current practice location is 3 Harbor Drive, Suite 111, Sausalito, California. You can reach out to his office (for appointments etc.) via phone at (415) 683-2988.

Dr Lawrence Posner is licensed to practice in California (license number A20698) 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 1952390098.

Contact Information

Dr Lawrence Posner, MD
3 Harbor Drive, Suite 111,
Sausalito, CA 94965
(415) 683-2988
(415) 683-2980

Map and Direction




Physician's Profile

Full NameDr Lawrence Posner
GenderMale
SpecialityInternal Medicine
Location3 Harbor Drive, Sausalito, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1952390098
  • Provider Enumeration Date: 10/20/2005
  • Last Update Date: 02/01/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 4587688924
  • Enrollment ID: I20080206000277

Medical Identifiers

Medical identifiers for Dr Lawrence Posner such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1952390098NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A20698 (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 Lawrence Posner allows following entities to bill medicare on his behalf.
Entity NamePrima Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811217946
PECOS PAC ID: 6406040138
Enrollment ID: O20101027000334
Entity NameRegents Univ Of California Ucsf
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1124439807
PECOS PAC ID: 6305160300
Enrollment ID: O20150122001375

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 Posner 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 Posner, MD
3 Harbor Drive, Suite 111,
Sausalito, CA 94965

Ph: (415) 683-2988		Dr Lawrence Posner, MD
3 Harbor Drive, Suite 111,
Sausalito, CA 94965

Ph: (415) 683-2988

Reviews and Comments


Internal Medicine Doctors in Sausalito, CA

Bradly P Jacobs, MD
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Practice Location: 601 Murray Circle, Sausalito, CA 94965
Phone: 415-339-2692    Fax: 415-339-2691
Dr. Carolyn Petersen, M.D.
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Phone: 415-521-0481    
Dean Michael Ornish, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 900 Bridgeway, Suite 1, Sausalito, CA 94965
Phone: 415-332-2525    Fax: 415-332-2588
Dr. Matthew Gordon Meldorf, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 630 Drake Ave, Sausalito, CA 94965
Phone: 650-296-6236    Fax: 650-225-6619
Martin Jerrold Lipton, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 5 Reade Ln, Sausalito, CA 94965
Phone: 415-332-3303    
Harris Avery Masket, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 601 Murray Circle, Sausalito, CA 94965
Phone: 415-339-2692    Fax: 415-339-2691

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.