Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Justin Alfonso, M.D.

Interventional Pain Medicine Physician in Jacksonville, FL · enumerated 2016 · practices at Jacksonville Spine Center PA.

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

National Provider Identifier

1336502277

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Registry record

Entity type Individual (Type 1)

Name Dr. Justin Alfonso

Credential M.D.

Sex Male

Practice address 15255 Max Leggett Pkwy Ste 5500, Jacksonville, FL, 32218

Phone (904) 223-3321

Enumeration date Mar 29, 2016

Last updated in NPPES Aug 22, 2025

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License ME145433 (FL) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License ME145433 (FL) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1336502277 active?

Yes, as of the latest NPPES snapshot, NPI 1336502277 is active (record last updated 2025-08-22).

How do I verify Justin Alfonso's NPI record?

Cross-check NPI 1336502277 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-22.