Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lloyd Simon, M.D.

Internal Medicine Physician in Southold, NY · enumerated 2006 · practices at Steven J.N. Chierchie, D.C., P.C..

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

National Provider Identifier

1811921463

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Registry record

Entity type Individual (Type 1)

Name Dr. Lloyd Simon

Credential M.D.

Sex Male

Practice address 44210 County Road 48, Southold, NY, 11971

Phone (631) 765-4150

Fax (631) 765-4688

Enumeration date Jul 10, 2006

Last updated in NPPES Apr 6, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 153210 (NY) Primary

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 153210-1 (NY) 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
00757786	Medicaid	NY	-

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 1811921463 active?

Yes, as of the latest NPPES snapshot, NPI 1811921463 is active (record last updated 2016-04-06).

How do I verify Lloyd Simon's NPI record?

Cross-check NPI 1811921463 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 →

Sally Monahan Family Nurse Practitioner · Southold, NY NPI 1811002868 Yuliya Vinnitskaya Internal Medicine Physician · Southold, NY NPI 1053560813 Steven J.N. Chierchie, D.C., P.C. Chiropractor · Southold, NY NPI 1235598400

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-06.