Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ryan Giammanco Markus, DPT

Physical Therapist in Austell, GA · enumerated 2008.

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

National Provider Identifier

1588827349

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ryan Giammanco Markus

Credential DPT

Sex Male

Practice address 3672 Marathon Cir, Suite 200, Austell, GA, 30106

Phone (770) 944-3303

Fax (770) 944-0285

Enumeration date Jul 2, 2008

Last updated in NPPES Feb 16, 2017

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT9350 (GA) Primary

DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession. About the DPT 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 1588827349 active?

Yes, as of the latest NPPES snapshot, NPI 1588827349 is active (record last updated 2017-02-16).

How do I verify Ryan Markus's NPI record?

Cross-check NPI 1588827349 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 →

Mark Duffield Orthopaedic Surgery Physician · Austell, GA NPI 1881697803 Keith Lamberson Orthopaedic Surgery Physician · Austell, GA NPI 1033112040 Alan Kippeny Physician Assistant · Austell, GA NPI 1487680849 Amanda Murach Physical Therapist · Austell, GA NPI 1992884266 Orthoatlanta, LLC Orthopaedic Surgery Physician · Austell, GA NPI 1467594242 Sudhir Belagaje Orthopaedic Surgery Physician · Austell, GA NPI 1225249519 Donald Fowler Orthopaedic Surgery Physician · Austell, GA NPI 1912167180 Terry Thompson Orthotist · Austell, GA NPI 1528373503

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-16.