NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John A Duncan, MD

Pediatric Endocrinology Physician in Melbourne, FL · enumerated 2005.

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

National Provider Identifier

1811987985

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name John A Duncan
Credential MD
Sex Male
Practice address 1223 Gateway Dr, 1g, Melbourne, FL, 32901
Phone (321) 723-0072
Fax (321) 952-0850
Enumeration date Oct 28, 2005
Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

2080P0205X Pediatric Endocrinology Physician Allopathic & Osteopathic Physicians · License ME37339 (FL) 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
460001110 Other FL RR MEDICARE
066661100 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1811987985 active?
Yes — as of the latest NPPES snapshot, NPI 1811987985 is active (record last updated 2022-07-21).
How do I verify John Duncan's NPI record?
Cross-check NPI 1811987985 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.