Ms Marissa Claire Niemeyer, MSN, AGPCNP-C - Medicare Nurse Practitioner in San Antonio, TX

Ms Marissa Claire Niemeyer, MSN, AGPCNP-C is a medicare enrolled "Nurse Practitioner - Primary Care" in San Antonio, Texas. She graduated from nursing school in 2021 and has 3 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Theoria Medical and her current practice location is 10223 Us Highway 281 N Ste 201, San Antonio, Texas. You can reach out to her office (for appointments etc.) via phone at (210) 338-8800.

Ms Marissa Claire Niemeyer is licensed to practice in Michigan (license number 4704330088NSA210G9) 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 1003485194.

Contact Information

Ms Marissa Claire Niemeyer, MSN, AGPCNP-C
10223 Us Highway 281 N Ste 201,
San Antonio, TX 78216-4664
(210) 338-8800
(210) 338-8825

Map and Direction




Provider's Profile

Full NameMs Marissa Claire Niemeyer
GenderFemale
SpecialityNurse Practitioner
Experience3 Years
Location10223 Us Highway 281 N Ste 201, San Antonio, Texas
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:
  • Ms Marissa Claire Niemeyer graduated from nursing school in 2021
  NPI Data:
  • NPI Number: 1003485194
  • Provider Enumeration Date: 06/22/2021
  • Last Update Date: 09/27/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 6901208040
  • Enrollment ID: I20221029000138

Medical Identifiers

Medical identifiers for Ms Marissa Claire Niemeyer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1003485194NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LP2300XNurse Practitioner - Primary Care 4704330088NSA210G9 (Michigan)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Theoria Medical5395098339100

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. Ms Marissa Claire Niemeyer allows following entities to bill medicare on her behalf.
Entity NameTheoria Medical
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609362375
PECOS PAC ID: 5395098339
Enrollment ID: O20181004002127

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. Ms Marissa Claire Niemeyer 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
Ms Marissa Claire Niemeyer, MSN, AGPCNP-C
10223 Us Highway 281 N Ste 201,
San Antonio, TX 78216-4664

Ph: (210) 338-8800
Ms Marissa Claire Niemeyer, MSN, AGPCNP-C
10223 Us Highway 281 N Ste 201,
San Antonio, TX 78216-4664

Ph: (210) 338-8800

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).

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