Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Reetta Marja Marciano, M.D.
Psychiatry Physician in Warren, OH · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588989446
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Registry record
Entity type Individual (Type 1)
Name Ms. Reetta Marja Marciano
Credential M.D.
Sex Female
Practice address 1350 E Market St, Warren, OH, 44483
Phone (308) 419-9423
Enumeration date Apr 5, 2010
Last updated in NPPES Jan 13, 2020
Taxonomy & licenses
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 35.129275 (OH) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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.
Frequently asked questions
What specialty is Reetta Marciano?
Reetta Marciano is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → Ernest Depasquale Emergency Medicine Physician · Warren, OH NPI 1508850611 Leonard Blass Infectious Disease Physician · Warren, OH NPI 1780678599 Linda Olmstead Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1073584959 Rajagopalan Lakshminarasimhan Internal Medicine Physician · Warren, OH NPI 1619943057 Robert Gurdak Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1336116425 George Knappenberger Geriatric Medicine (Internal Medicine) Physician · Warren, OH NPI 1326016866 Trumbull Pathology Associates Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1033174420 Margaret Layshock Certified Registered Nurse Anesthetist · Warren, OH NPI 1063460392
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-13.