Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Joseph Graykoski, PA
Physician Assistant in Barron, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740234772
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Registry record
Entity type Individual (Type 1)
Name John Joseph Graykoski
Credential PA
Sex Male
Practice address 1222 E Woodland Ave, Barron, WI, 54812
Phone (715) 537-3166
Enumeration date May 22, 2006
Last updated in NPPES Oct 11, 2019
Taxonomy & licenses
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 1944023 (WI) Secondary
207PE0004X Emergency Medical Services (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 1944023 (WI) Secondary
207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 1944023 (WI) Secondary
207PT0002X Medical Toxicology (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 1944023 (WI) Secondary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 1944 (WI) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA 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.
Frequently asked questions
How do I verify John Graykoski's NPI record?
Cross-check NPI 1740234772 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1740234772 active?
Yes, as of the latest NPPES snapshot, NPI 1740234772 is active (record last updated 2019-10-11).
Other providers at this practice address
Browse all → Christa Mars Surgery Physician · Barron, WI NPI 1235139510 Eric Nuebel Physician Assistant · Barron, WI NPI 1154318616 Kathleen Nuebel Physician Assistant · Barron, WI NPI 1578550034 Curtis Ongstad Family Medicine Physician · Barron, WI NPI 1689656811 James Leavitt Orthopaedic Surgery Physician · Barron, WI NPI 1710967351 Thomas Stephens Physical Therapist · Barron, WI NPI 1891768081 Sarah Knepper Physical Therapist · Barron, WI NPI 1508839796 Karey Stevenson Occupational Therapist · Barron, WI NPI 1306819594
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-11.