Mark P Clark, MD - Medicare Internal Medicine in Glendale, CA

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Mark P Clark, MD is a medicare enrolled "Internal Medicine" physician in Glendale, California. He went to Loyola University Of Chicago, Stritch School Of Medicine and graduated in 1982 and has 44 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice City And County Of San Francisco, One Medical Group Inc and his current practice location is 3746 Foothill Blvd # B140, Glendale, California. You can reach out to his office (for appointments etc.) via phone at (310) 445-5999.

Mark P Clark is licensed to practice in California (license number G50527) 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 1891874665.

Contact Information

Mark P Clark, MD
3746 Foothill Blvd # B140,
Glendale, CA 91214-1740
(310) 445-5999
(323) 544-4248

Map and Direction




Physician's Profile

Full NameMark P Clark
GenderMale
SpecialityInternal Medicine
Experience44 Years
Location3746 Foothill Blvd # B140, Glendale, 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:
  • Mark P Clark attended and graduated from Loyola University Of Chicago, Stritch School Of Medicine in 1982
  NPI Data:
  • NPI Number: 1891874665
  • Provider Enumeration Date: 11/03/2006
  • Last Update Date: 11/18/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 2163610205
  • Enrollment ID: I20160323001860

Medical Identifiers

Medical identifiers for Mark P Clark such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1891874665NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G50527 (California)Primary
208M00000XHospitalist G50527 (California)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Laguna Honda Hospital & Rehabilitation CenterSan francisco, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
City And County Of San Francisco1658280748368
One Medical Group Inc2567623739330

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. Mark P Clark allows following entities to bill medicare on his behalf.
Entity NameCity & County of San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982737524
PECOS PAC ID: 1658280748
Enrollment ID: O20050309000770
Entity NameSkilled Facility Health Care Solutions Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104018423
PECOS PAC ID: 9032299144
Enrollment ID: O20080102000273
Entity NameOne Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1467781641
PECOS PAC ID: 2567623739
Enrollment ID: O20120416000113
Entity NameSkilled Biologics Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376386763
PECOS PAC ID: 4880132760
Enrollment ID: O20240812000699
Entity NameSkilled Physicians Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902444623
PECOS PAC ID: 6103254115
Enrollment ID: O20260414002299

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. Mark P Clark 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
Mark P Clark, MD
3746 Foothill Blvd # B140,
Glendale, CA 91214-1740

Ph: (310) 445-5999		Mark P Clark, MD
3746 Foothill Blvd # B140,
Glendale, CA 91214-1740

Ph: (310) 445-5999

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.