Marjolein Sieczkowski, LCSW - Medicare Clinical Social Worker in Flagstaff, AZ

Marjolein Sieczkowski, LCSW is a medicare enrolled "Social Worker - Clinical" provider in Flagstaff, Arizona. She graduated from medical school in 2009 and has 15 years of diverse experience with area of expertise as Clinical Social Worker. She is a member of the group practice Kelli Sieczkowski Pllc and her current practice location is 125 E Elm Ave Ste 203, Flagstaff, Arizona. You can reach out to her office (for appointments etc.) via phone at (480) 466-2428.

Marjolein Sieczkowski is licensed to practice in Arizona (license number LCSW-16963) 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 1457850984.

Contact Information

Marjolein Sieczkowski, LCSW
125 E Elm Ave Ste 203,
Flagstaff, AZ 86001-3261
(480) 466-2428
Not Available

Map and Direction




Healthcare Provider's Profile

Full NameMarjolein Sieczkowski
GenderFemale
SpecialityClinical Social Worker
Experience15 Years
Location125 E Elm Ave Ste 203, Flagstaff, Arizona
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:
  • Marjolein Sieczkowski graduated from medical school in 2009
  NPI Data:
  • NPI Number: 1457850984
  • Provider Enumeration Date: 02/10/2018
  • Last Update Date: 02/10/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 8729341813
  • Enrollment ID: I20180425000765

Medical Identifiers

Medical identifiers for Marjolein Sieczkowski such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1457850984NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
1041C0700XSocial Worker - Clinical LCSW-16963 (Arizona)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Kelli Sieczkowski Pllc22647009542

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. Marjolein Sieczkowski allows following entities to bill medicare on her behalf.
Entity NameKelli Sieczkowski Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851830582
PECOS PAC ID: 2264700954
Enrollment ID: O20170621002754

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. Marjolein Sieczkowski 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
Marjolein Sieczkowski, LCSW
125 E Elm Ave Ste 203,
Flagstaff, AZ 86001-3261

Ph: (480) 466-2428
Marjolein Sieczkowski, LCSW
125 E Elm Ave Ste 203,
Flagstaff, AZ 86001-3261

Ph: (480) 466-2428

Reviews and Comments


Social Worker in Flagstaff, AZ

Mrs. Kathryn Louise Peterson, LCSW
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Phone: 928-213-0068    Fax: 928-774-4367
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Phone: 928-773-8200    
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Phone: 928-714-6401    Fax: 928-714-6480
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Phone: 928-522-9685    
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Phone: 289-864-7250    
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Phone: 928-773-1245    
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Phone: 928-773-8270    

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.