Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Robert M Mayer, MD
Psychiatry Physician in Largo, FL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699748251
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Robert M Mayer
Credential MD
Sex Male
Practice address 1100 Clearwater Largo Rd N, Largo, FL, 33770
Phone (727) 518-6444
Fax (727) 581-2678
Enumeration date Feb 13, 2006
Last updated in NPPES Aug 10, 2015
Taxonomy & licenses
2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License ME48573 (FL) Secondary
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 |
|---|---|---|---|
| 48815100 | Medicaid | FL | - |
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
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 Robert Mayer?
Robert Mayer 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.
Other providers at this practice address
Browse all → Rachel Agustines Child & Adolescent Psychiatry Physician · Largo, FL NPI 1386617306 Nihal Shah Psychiatry Physician · Largo, FL NPI 1407829088 Ashok Patel Psychiatry Physician · Largo, FL NPI 1124091798 Behavioral Health Management Services, Inc Mental Health Counselor · Largo, FL NPI 1952319659 Florida Behavioral Institute Plc Substance Use Disorder Rehabilitation Clinic/Center · Largo, FL NPI 1770594665 Cheryl Oliver Mental Health Counselor · Largo, FL NPI 1538272158 Bonnie Whitehurst Mental Health Counselor · Largo, FL NPI 1649385956 Judith Howard Mental Health Counselor · Largo, FL NPI 1093820094
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-10.