Thomas Nielsen, M.D.
NPI 1871521757 · Phlebology Physician · Bloomington, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Nielsen, M.D. is a Phlebology Physician provider in Bloomington, IL (NPI 1871521757).
Provider details
- NPI number
- 1871521757
- Entity type
- Individual
- Primary specialty
- Phlebology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036065215 (IL)
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
633 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 184 | $54 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 130 | $108 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 94 | $171 |
| Ultrasonic Guidance for Needle Placement76942 | 65 | $54 |
| Injection of Chemical Agent Into Multiple Incompetent Veins of Leg36471 | 62 | $188 |
| Laser Destruction of Incompetent Vein of Arm Or Leg Using Imaging Guidance36478 | 52 | $894 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Naproxen | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-29
- Last updated
- 2014-03-25
Frequently asked questions
- What is Thomas Nielsen's NPI number?
- Thomas Nielsen's National Provider Identifier (NPI) is 1871521757, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Nielsen's specialty?
- Thomas Nielsen is listed in the NPPES registry with a primary specialty of Phlebology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Nielsen located?
- Thomas Nielsen's practice location on file with NPPES is 3302 Gerig Dr, Bloomington, IL 61704-6365.
- What is Thomas Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Thomas Nielsen is (309) 862-4000.
- Does Thomas Nielsen accept Medicare?
- Thomas Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Nielsen's NPI active?
- Yes — Thomas Nielsen's NPI (1871521757) is active in the NPPES registry as of the last update on 2014-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.