Dr Thais Siewert, PMHNP - Medicare Nurse Practitioner in La Jolla, CA

Dr Thais Siewert, PMHNP is a medicare enrolled "Nurse Practitioner - Psychiatric/mental Health" in La Jolla, California. She graduated from nursing school in 2020 and has 4 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Advantage Neuropsychiatric Assoc and her current practice location is 888 Prospect St Ste 200, La Jolla, California. You can reach out to her office (for appointments etc.) via phone at (415) 849-2466.

Dr Thais Siewert is licensed to practice in California (license number 95014585) 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 1194348318.

Contact Information

Dr Thais Siewert, PMHNP
888 Prospect St Ste 200,
La Jolla, CA 92037-4261
(415) 849-2466
(415) 376-4529

Map and Direction




Provider's Profile

Full NameDr Thais Siewert
GenderFemale
SpecialityNurse Practitioner
Experience4 Years
Location888 Prospect St Ste 200, La Jolla, 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 Thais Siewert graduated from nursing school in 2020
  NPI Data:
  • NPI Number: 1194348318
  • Provider Enumeration Date: 05/21/2020
  • Last Update Date: 08/05/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 6901222918
  • Enrollment ID: I20200820001080

Medical Identifiers

Medical identifiers for Dr Thais Siewert such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194348318NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LP0808XNurse Practitioner - Psychiatric/mental Health 95014585 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Advantage Neuropsychiatric Assoc054739504814

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 Thais Siewert allows following entities to bill medicare on her behalf.
Entity NameAdvantage Neuropsychiatric Assoc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043455850
PECOS PAC ID: 0547395048
Enrollment ID: O20100323000710
Entity NameMellow Medical Inc A Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1407275886
PECOS PAC ID: 3375767403
Enrollment ID: O20140611002222
Entity NameDr Eric Chaghouri Md A Professional Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285395269
PECOS PAC ID: 8325403637
Enrollment ID: O20230420000375

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 Thais Siewert 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 Thais Siewert, PMHNP
17595 Harvard Ave, Ste C, #169,
Irvine, CA 92614-8574

Ph: (949) 424-5444
Dr Thais Siewert, PMHNP
888 Prospect St Ste 200,
La Jolla, CA 92037-4261

Ph: (415) 849-2466

Reviews and Comments


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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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