Dr Tammy Pei-hsin Cheng Sievers, MD - Medicare Rheumatology in Ventura, CA

Dr Tammy Pei-hsin Cheng Sievers, MD is a medicare enrolled "Internal Medicine - Rheumatology" physician in Ventura, California. She went to Washington University School Of Medicine and graduated in 2002 and has 22 years of diverse experience with area of expertise as Rheumatology. She is a member of the group practice Community Memorial Health System and her current practice location is 120 N Ashwood Ave, Ventura, California. You can reach out to her office (for appointments etc.) via phone at (805) 658-5800.

Dr Tammy Pei-hsin Cheng Sievers is licensed to practice in California (license number A110176) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1619004694.

Contact Information

Dr Tammy Pei-hsin Cheng Sievers, MD
120 N Ashwood Ave,
Ventura, CA 93003-1810
(805) 658-5800
Not Available

Map and Direction




Physician's Profile

Full NameDr Tammy Pei-hsin Cheng Sievers
GenderFemale
SpecialityRheumatology
Experience22 Years
Location120 N Ashwood Ave, Ventura, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Tammy Pei-hsin Cheng Sievers attended and graduated from Washington University School Of Medicine in 2002
  NPI Data:
  • NPI Number: 1619004694
  • Provider Enumeration Date: 02/27/2007
  • Last Update Date: 03/08/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 2466543558
  • Enrollment ID: I20100309000727

Medical Identifiers

Medical identifiers for Dr Tammy Pei-hsin Cheng Sievers such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1619004694NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RR0500XInternal Medicine - Rheumatology A110176 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Community Memorial Hospital San BuenaventuraVentura, CAHospital
Ojai Valley Community HospitalOjai, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Community Memorial Health System9537155676164

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 Tammy Pei-hsin Cheng Sievers allows following entities to bill medicare on her behalf.
Entity NameCommunity Memorial Health System
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1215903018
PECOS PAC ID: 9537155676
Enrollment ID: O20040422001668

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 Tammy Pei-hsin Cheng Sievers 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 Tammy Pei-hsin Cheng Sievers, MD
5855 Olivas Park Dr,
Ventura, CA 93003-7672

Ph: (805) 667-2801
Dr Tammy Pei-hsin Cheng Sievers, MD
120 N Ashwood Ave,
Ventura, CA 93003-1810

Ph: (805) 658-5800

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.