Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lawrence Stuart Greenfield, M.D.

Addiction Medicine (Internal Medicine) Physician in Apollo Beach, FL · enumerated 2007.

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

National Provider Identifier

1912040940

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Registry record

Entity type Individual (Type 1)

Name Lawrence Stuart Greenfield

Credential M.D.

Sex Male

Practice address Apollo Beach, FL, 33572

Phone (813) 649-0407

Fax (813) 649-0646

Enumeration date Feb 15, 2007

Last updated in NPPES Sep 11, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License ME95989 (FL) Secondary

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License ME95989 (FL) Primary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License ME95989 (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
MA97837	Medicaid	PA	-

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

How do I verify Lawrence Greenfield's NPI record?

Cross-check NPI 1912040940 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1912040940 active?

Yes, as of the latest NPPES snapshot, NPI 1912040940 is active (record last updated 2025-09-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.