Mark Helquist, M.D.
NPI 1427110642 · Diagnostic Radiology Physician · Jacksonville, FL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Helquist, M.D. is a Diagnostic Radiology Physician provider in Jacksonville, FL (NPI 1427110642).
Provider details
- NPI number
- 1427110642
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- TRN8911 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,687 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 570 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 156 | $38 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 79 | $85 |
| Screening 3d Breast Mammography77063 | 76 | $27 |
| Screening Mammography77067 | 76 | $35 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 69 | $81 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Helquist's NPI number?
- Mark Helquist's National Provider Identifier (NPI) is 1427110642, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Helquist's specialty?
- Mark Helquist is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Helquist located?
- Mark Helquist's practice location on file with NPPES is 655 W 8th St # C90, Jacksonville, FL 32209-6511.
- What is Mark Helquist's phone number?
- The practice phone number listed in the NPPES registry for Mark Helquist is (904) 244-4225.
- Does Mark Helquist accept Medicare?
- Mark Helquist is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Helquist's NPI active?
- Yes — Mark Helquist's NPI (1427110642) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.