Brett James Ley, MD - Medicare Internal Medicine in San Francisco, CA

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Brett James Ley, MD is a medicare enrolled "Internal Medicine - Pulmonary Disease" physician in San Francisco, California. He went to University Of California, San Francisco School Of Medicine and graduated in 2008 and has 16 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Permanente Medical Group Inc and his current practice location is 505 Parnassus Ave, Room M-987, San Francisco, California. You can reach out to his office (for appointments etc.) via phone at (415) 476-1528.

Brett James Ley is licensed to practice in California (license number A112254) 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 1538494620.

Contact Information

Brett James Ley, MD
505 Parnassus Ave, Room M-987,
San Francisco, CA 94143-2204
(415) 476-1528
Not Available

Map and Direction




Physician's Profile

Full NameBrett James Ley
GenderMale
SpecialityInternal Medicine
Experience16 Years
Location505 Parnassus Ave, San Francisco, California
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:
  • Brett James Ley attended and graduated from University Of California, San Francisco School Of Medicine in 2008
  NPI Data:
  • NPI Number: 1538494620
  • Provider Enumeration Date: 10/07/2009
  • Last Update Date: 12/15/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 3072798271
  • Enrollment ID: I20110504000221

Medical Identifiers

Medical identifiers for Brett James Ley such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1538494620NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RP1001XInternal Medicine - Pulmonary Disease A112254 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Kaiser Foundation Hospital - San FranciscoSan francisco, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Permanente Medical Group Inc89219102258376

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. Brett James Ley allows following entities to bill medicare on his behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881763597
PECOS PAC ID: 4284547274
Enrollment ID: O20031106000389
Entity NameUniversity Of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameUcsf Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

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. Brett James Ley 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
Brett James Ley, MD
505 Parnassus Ave, Room M-987,
San Francisco, CA 94143-2204

Ph: (415) 476-1528		Brett James Ley, MD
505 Parnassus Ave, Room M-987,
San Francisco, CA 94143-2204

Ph: (415) 476-1528

Reviews and Comments


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Dr. Adriana A.t. Martin, M.D., PH.D.
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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.

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