Cornelius Ja Jansen, MD - Medicare Otolaryngology in Walnut Creek, CA

Cornelius Ja Jansen, MD is a medicare enrolled "Otolaryngology" physician in Walnut Creek, California. He went to Johns Hopkins University School Of Medicine and graduated in 1983 and has 41 years of diverse experience with area of expertise as Otolaryngology. He is a member of the group practice Regents Of The University Of California and his current practice location is 1425 S Main St, Walnut Creek, California. You can reach out to his office (for appointments etc.) via phone at (925) 295-4000.

Cornelius Ja Jansen is licensed to practice in California (license number G85048) 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 1285712380.

Contact Information

Cornelius Ja Jansen, MD
1425 S Main St,
Walnut Creek, CA 94596-5318
(925) 295-4000
Not Available

Map and Direction




Physician's Profile

Full NameCornelius Ja Jansen
GenderMale
SpecialityOtolaryngology
Experience41 Years
Location1425 S Main St, Walnut Creek, 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:
  • Cornelius Ja Jansen attended and graduated from Johns Hopkins University School Of Medicine in 1983
  NPI Data:
  • NPI Number: 1285712380
  • Provider Enumeration Date: 11/02/2006
  • Last Update Date: 10/11/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 0345421897
  • Enrollment ID: I20110216001213

Medical Identifiers

Medical identifiers for Cornelius Ja Jansen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285712380NPI-NPPES
00G850480MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Y00000XOtolaryngology G85048 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Uc San Diego Health Hillcrest - Hillcrest Med CtrSan diego, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Regents Of The University Of California35774767611706

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. Cornelius Ja Jansen allows following entities to bill medicare on his behalf.
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376646869
PECOS PAC ID: 3577476761
Enrollment ID: O20031112000695
Entity NameRegents Of The University Of California Ucsd Head And Neck Surgery
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1679509962
PECOS PAC ID: 9032006200
Enrollment ID: O20040302000950
Entity NameRitvik Mehta Md, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538302997
PECOS PAC ID: 8022163286
Enrollment ID: O20090911000428

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. Cornelius Ja Jansen 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
Cornelius Ja Jansen, MD
2390 Faraday Ave,
Carlsbad, CA 92008-7216

Ph: (510) 625-6262
Cornelius Ja Jansen, MD
1425 S Main St,
Walnut Creek, CA 94596-5318

Ph: (925) 295-4000

Reviews and Comments


Otolaryngology Doctors in Walnut Creek, CA

Glenn D. Schneider, MD
Otolaryngology
Medicare: Not Enrolled in Medicare
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
Bryan Philip Fong, MD
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
Dr. Rahul Seth, M.D.
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 355 Lennon Ln Ste 235, Walnut Creek, CA 94598
Phone: 925-357-9050    Fax: 925-357-9040
Nicole Daamen, MD
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
Erica Christine Bennett, MD
Otolaryngology
Medicare: Medicare Enrolled
Practice Location: 106 La Casa Via Ste 100, Walnut Creek, CA 94598
Phone: 925-239-2900    
Dr. Sarah Syed Connell, M.D.
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4100    Fax: 925-295-5414

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.