Mark Nielsen, MD
NPI 1790873164 · Urology Physician · Jacksonville Beach, FL
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Nielsen, MD is a Urology Physician provider in Jacksonville Beach, FL (NPI 1790873164).
Provider details
- NPI number
- 1790873164
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 35.152092 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
256 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 120 | $78 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 56 | $128 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 49 | $119 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 16 | $83 |
| Insertion of Stent in Ureter Using an Endoscope52332 | 15 | $156 |
Typical Medicare-allowed amounts for these services range $78–$156 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 200 Se Hospital AveStuart, FL 34994-2346Phone: (772) 419-4834
- 4000 Miamisburg Centerville Rd Ste 450Miamisburg, OH 45342-3908Phone: (937) 560-2011
Registry dates
- Enumerated
- 2006-10-11
- Last updated
- 2024-12-18
- Certified
- 2024-12-18
Frequently asked questions
- What is Mark Nielsen's NPI number?
- Mark Nielsen's National Provider Identifier (NPI) is 1790873164, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Nielsen's specialty?
- Mark Nielsen is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Nielsen located?
- Mark Nielsen's practice location on file with NPPES is 917 1st St N Apt 1202, Jacksonville Beach, FL 32250-9109.
- What is Mark Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Mark Nielsen is (936) 544-4498.
- Does Mark Nielsen accept Medicare?
- Mark Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Nielsen's NPI active?
- Yes — Mark Nielsen's NPI (1790873164) is active in the NPPES registry as of the last update on 2024-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.