Rebecca Blonsky, M.D.
NPI 1669812764 · Nephrology Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rebecca Blonsky, M.D. is a Nephrology Physician provider in Marshfield, WI (NPI 1669812764).
Provider details
- NPI number
- 1669812764
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 62801 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
899 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) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 234 | $329 |
| Dialysis Services, Per Day, Less Than Full Month Service (20 Years Or Older)90970 | 159 | $9 |
| Hemodialysis Procedure With Physician Evaluation90935 | 117 | $66 |
| Home Dialysis Services Per Month (20 Years Or Older)90966 | 95 | $273 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 79 | $76 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 63 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 54 | 22 |
| Lisinopril | 44 | 19 |
| Carvedilol | 37 | 16 |
| Furosemide | 34 | 20 |
| Calcitriol | 33 | — |
| Losartan Potassium | 28 | 14 |
| Potassium Chloride | 28 | — |
| Spironolactone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$58 across 1 record (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
Registry dates
- Enumerated
- 2013-07-03
- Last updated
- 2021-04-01
- Certified
- 2021-04-01
Frequently asked questions
- What is Rebecca Blonsky's NPI number?
- Rebecca Blonsky's National Provider Identifier (NPI) is 1669812764, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rebecca Blonsky's specialty?
- Rebecca Blonsky is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Rebecca Blonsky located?
- Rebecca Blonsky's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5703.
- What is Rebecca Blonsky's phone number?
- The practice phone number listed in the NPPES registry for Rebecca Blonsky is (715) 387-5511.
- Does Rebecca Blonsky accept Medicare?
- Rebecca Blonsky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rebecca Blonsky's NPI active?
- Yes — Rebecca Blonsky's NPI (1669812764) is active in the NPPES registry as of the last update on 2021-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.