Sierra Hartsfield, - Medicare Clinical Social Worker in Cerritos, CA

Sierra Hartsfield, is a medicare enrolled "Social Worker - Clinical" provider in Cerritos, California. Her current practice location is 12900 Park Plaza Dr, Cerritos, California. You can reach out to her office (for appointments etc.) via phone at (562) 467-5438.

Sierra Hartsfield is licensed to practice in California (license number 94879) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1043631922.

Contact Information

Sierra Hartsfield,
12900 Park Plaza Dr,
Cerritos, CA 90703-9329
(562) 467-5438
Not Available

Map and Direction




Healthcare Provider's Profile

Full NameSierra Hartsfield
GenderFemale
SpecialitySocial Worker - Clinical
Location12900 Park Plaza Dr, Cerritos, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1043631922
  • Provider Enumeration Date: 12/19/2013
  • Last Update Date: 05/11/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6305105909
  • Enrollment ID: I20180104001144

Medical Identifiers

Medical identifiers for Sierra Hartsfield such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1043631922NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
1041C0700XSocial Worker - Clinical 19073 (Maryland)Secondary
1041C0700XSocial Worker - Clinical 94879 (California)Primary

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. Sierra Hartsfield allows following entities to bill medicare on her behalf.
Entity NameAdvanced Behavioral Health Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154799559
PECOS PAC ID: 8022147933
Enrollment ID: O20171228002235

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. Sierra Hartsfield 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
Sierra Hartsfield,
60 Market St Ste 213,
Gaithersburg, MD 20878-6559

Ph: (240) 813-4433
Sierra Hartsfield,
12900 Park Plaza Dr,
Cerritos, CA 90703-9329

Ph: (562) 467-5438

Reviews and Comments


Social Worker in Cerritos, CA

Mr. Michael John Tyoran, LCSW
Clinical Social Worker
Medicare: Not Enrolled in Medicare
Practice Location: 17707 Studebaker Rd, Cerritos, CA 90703
Phone: 562-403-0381    
Mrs. Alisa C. Gibney, ASW
Clinical Social Worker
Medicare: Not Enrolled in Medicare
Practice Location: 10929 South St, Suite 208b, Cerritos, CA 90703
Phone: 562-924-5526    Fax: 562-924-1040
Mr. Skylar Scott Valles, LCSW
Clinical Social Worker
Medicare: Medicare Enrolled
Practice Location: 17215 Studebaker Rd Ste 110, Cerritos, CA 90703
Phone: 714-932-6201    
Mrs. Leticia Guzman-soydan, MSW
Clinical Social Worker
Medicare: Not Enrolled in Medicare
Practice Location: 17707 Studebaker Rd, Cerritos, CA 90703
Phone: 562-402-0688    
Miss Tracy Pauline Schmidt, LCSW
Clinical Social Worker
Medicare: Not Enrolled in Medicare
Practice Location: 10929 South St, Suite 214b, Cerritos, CA 90703
Phone: 562-865-6444    Fax: 562-865-5864
Mallory Ruth Axelrod, LCSW
Clinical Social Worker
Medicare: Not Enrolled in Medicare
Practice Location: 10929 South St Ste 214b, Cerritos, CA 90703
Phone: 562-924-5526    

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.