Matthew Walt Gerenz, MD - Medicare Psychiatry in Orange, CA

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Matthew Walt Gerenz, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Orange, California. He graduated from medical school in 2021 and has 5 years of diverse experience with area of expertise as Psychiatry. He is a member of the group practice Mellow Medical Inc A Professional Corporation and his current practice location is 3800 W Chapman Ave, Orange, California. You can reach out to his office (for appointments etc.) via phone at (701) 400-2926.

Matthew Walt Gerenz is licensed to practice in California (license number A183126) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1992385785.

Contact Information

Matthew Walt Gerenz, MD
3800 W Chapman Ave,
Orange, CA 92868-1638
(701) 400-2926
Not Available

Map and Direction




Physician's Profile

Full NameMatthew Walt Gerenz
GenderMale
SpecialityPsychiatry
Experience5 Years
Location3800 W Chapman Ave, Orange, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Matthew Walt Gerenz graduated from medical school in 2021
  NPI Data:
  • NPI Number: 1992385785
  • Provider Enumeration Date: 04/14/2021
  • Last Update Date: 04/25/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 9537527031
  • Enrollment ID: I20230807003122

Medical Identifiers

Medical identifiers for Matthew Walt Gerenz such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1992385785NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry A183126 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mellow Medical Inc A Professional Corporation337576740330

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. Matthew Walt Gerenz allows following entities to bill medicare on his behalf.
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 NameWest Coast Psychiatry MD P.C.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477352581
PECOS PAC ID: 8820516008
Enrollment ID: O20250521000259

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. Matthew Walt Gerenz 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
Matthew Walt Gerenz, MD
3800 W Chapman Ave,
Orange, CA 92868-1638

Ph: Not Available		Matthew Walt Gerenz, MD
3800 W Chapman Ave,
Orange, CA 92868-1638

Ph: (701) 400-2926

Reviews and Comments


Psychiatry & Neurology Doctors in Orange, CA

Demi Tran,
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Phone: 171-456-6693    
Julian Thomas, MD
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Phone: 714-509-7601    
Dr. Lawrence Richard Faziola, M.D.
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Practice Location: 101 The City Dr S, Route 88, Orange, CA 92868
Phone: 714-506-0693    
Dr. Sharon Kim, MD
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Practice Location: 455 S Main St, Orange, CA 92868
Phone: 714-532-7601    
Esther Lee Yang,
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Practice Location: 1120 W La Veta Ave Ste 660&470, Orange, CA 92868
Phone: 714-509-8210    
James Yuanjing Zhang,
Psychiatry & Neurology
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Practice Location: 3800 W Chapman Ave Ste 500, Orange, CA 92868
Phone: 714-456-5902    
Mehron Singh Dhillon, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 3800 W Chapman Ave Ste 500, Orange, CA 92868
Phone: 714-456-5902    

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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