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Mark Gregory Marrone, MD

Nephrology Physician in Livonia, MI · enumerated 2005 · practices at Prostik Solutions LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1003809575

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Registry record

Entity type Individual (Type 1)
Name Mark Gregory Marrone
Credential MD
Sex Male
Practice address 18302 Middlebelt Rd, Livonia, MI, 48152
Phone (248) 478-1500
Fax (248) 478-2798
Enumeration date Aug 30, 2005
Last updated in NPPES Sep 9, 2022

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 4301058209 (MI) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
11282853 Other - CAQH
10-3328315 Medicaid MI -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mark Marrone?
Mark Marrone is registered in NPPES with the primary taxonomy of Nephrology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-09-09.