Thomas Brefeld, MD
NPI 1699885871 · Internal Medicine Physician · Rockford, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Brefeld, MD is a Internal Medicine Physician provider in Rockford, IL (NPI 1699885871).
Provider details
- NPI number
- 1699885871
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036104961 (IL)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
298 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 222 | $77 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 76 | $107 |
Typical Medicare-allowed amounts for these services range $77–$107 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$10,812 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 875 S Route 31Crystal Lake, IL 60014-8190Phone: (779) 220-5500
- 901 Grant StHarvard, IL 60033-1821Phone: (815) 943-5431
- 2400 N Rockton AveRockford, IL 61103-3655Phone: (815) 971-4025
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2025-05-23
- Certified
- 2025-05-13
Frequently asked questions
- What is Thomas Brefeld's NPI number?
- Thomas Brefeld's National Provider Identifier (NPI) is 1699885871, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Brefeld's specialty?
- Thomas Brefeld is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Brefeld located?
- Thomas Brefeld's practice location on file with NPPES is 8201 E Riverside Blvd, Rockford, IL 61114-2300.
- What is Thomas Brefeld's phone number?
- The practice phone number listed in the NPPES registry for Thomas Brefeld is (815) 971-4066.
- Does Thomas Brefeld accept Medicare?
- Thomas Brefeld is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Brefeld's NPI active?
- Yes — Thomas Brefeld's NPI (1699885871) is active in the NPPES registry as of the last update on 2025-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.