Proto360, LLC
Proto360, LLC is a healthcare organization registered as Obesity Medicine (Preventive Medicine) Physician in Annapolis, MD, holding Type 2 (organization) NPI 1043136526 since 2026. The authorized official on file is Katrina Mattingly, Founding Partner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1043136526 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Proto360, LLC |
| Practice address | 419 4TH ST, Annapolis, MD, 21403 |
| Phone | 410-823-8243 |
| Enumeration date | 2026-06-29 |
| Last updated in NPPES | 2026-06-29 |
Authorized official
| Name | Katrina Mattingly |
|---|---|
| Title | Founding Partner |
| Phone | 3523393111 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 261QU0200X | Urgent Care Clinic/Center | Secondary | — | — |
| 2083B0002X | Obesity Medicine (Preventive Medicine) Physician | Primary | — | — |
Copy-ready billing details
Provider: Proto360, LLC NPI: 1043136526 Taxonomy: 2083B0002X (Obesity Medicine (Preventive Medicine) Physician) Address: 419 4TH ST, Annapolis, MD, 21403
Verify this record
Cross-check NPI 1043136526 against the authoritative CMS record: view Proto360, LLC on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
What is a Type 2 NPI?
What type of organization is Proto360, LLC?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2026-06-29.