NPPES file of Aug 9, 2026

Mark Helquist, M.D.

Diagnostic Radiology Physician · Jacksonville, FL

Mark Helquist, M.D. is a diagnostic radiology physician with a practice address in Jacksonville, Florida, and NPI 1427110642, issued on Dec 14, 2006. Check the license (Florida TRN8911, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1427110642
Name
Mark Helquist
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
TRN8911 FL
Self-reported in NPPES; status is on the state search
Practice location
655 W 8TH St # C90, Jacksonville, FL 32209
Phone
(904) 244-4225
Enumerated
Dec 14, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(904) 244-3383
Medicare enrollment
Enrolled (PECOS I20100628000716); accepts Medicare assignment
Medical or professional school
University Of Florida College Of Medicine, 2004
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 655 W 8TH St # C90

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Parker Freels, MDDiagnostic Radiology Physician1497249973
  2. Lee Friedman, M.D.Diagnostic Radiology Physician1992867360
  3. Nina Luxenberg, M.D.Diagnostic Radiology Physician1477536746
  4. Scott McGaughStudent in an Organized Health Care Education/Training Program1922850932
  5. Adnan Mohammed, MDDiagnostic Radiology Physician1770043994
  6. Steven Morales Rivera, MDVascular & Interventional Radiology Physician1952831604

Verify Mark Helquist in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersFlorida health license search
    Search for license TRN8911    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Florida license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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4 hospitals and group practices

  1. Brooks County HospitalPonte Vedra Beach, FL
  2. Grady General HospitalCairo, GA · Acute Care Hospitals
  3. Hospital Authority OF Mitchell CountyJacksonville, FL
  4. John D Archbold Memorial Hospital IncCairo, GA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).

298 diagnostic radiology physician records list a practice address in Jacksonville

They are 298 of the 24,194 NPPES records with a practice address in Jacksonville, and 2,761 diagnostic radiology physician records in Florida.

All 298 in Jacksonville → All 2,761 in Florida → Every provider in Jacksonville →

Other diagnostic radiology physician records in Florida

  1. Grant Abadal, M.D.St Petersburg, FL1457770232
  2. Suhny Abbara, MDJacksonville, FL1538150180
  3. Patricia Abbitt, MDGainesville, FL1629040811
  4. Franklin Abbott, M.D.Pensacola, FL1386605954
  5. Adel Abdalla, M.D.Orlando, FL1497702542
  6. Adel Abdelkader, M.DLargo, FL1104120112
  7. Ashraf Abdulhalim, MDJacksonville, FL1245869890
  8. Michael Abiog, M.D.Deerfield Beach, FL1174506430
  9. Gehad Aboud, DOClearwater, FL1366548760
  10. Elizabeth Abraham, MDWinter Haven, FL1962400192

Common questions

What is Mark Helquist, M.D.'s NPI number?

Mark Helquist, M.D.'s National Provider Identifier (NPI) is 1427110642, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Helquist, M.D. located?

The NPPES record lists a practice address at 655 W 8TH St # C90, Jacksonville, FL, 32209. Phone: (904) 244-4225. Providers update this record themselves, so call before visiting.

How can I verify Mark Helquist, M.D.'s license?

NPPES lists Florida license number TRN8911, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.