Carol Grabowski, MD
NPI 1669582532 · Radiation Oncology Physician · Appleton, WI
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carol Grabowski, MD is a Radiation Oncology Physician provider in Appleton, WI (NPI 1669582532).
Provider details
- NPI number
- 1669582532
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 33288 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
191 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 51 | $90 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 45 | $178 |
| Calculation of Radiation Therapy Dose77300 | 40 | $31 |
| Design and Construction of Complex Radiation Treatment Device77334 | 24 | $57 |
| Complex Radiation Therapy Planning77263 | 16 | $157 |
| Obtaining Data Needed to Develop the Optimal Radiation Treatment, 1 Treatment Area77280 | 15 | $35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 23 | 11 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 13 | — |
| Ibuprofen | 12 | — |
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
Additional practice locations (1)
- 4100 State Highway 66Stevens Point, WI 54482-8410Phone: (715) 343-7730
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2025-02-28
- Certified
- 2025-02-28
Frequently asked questions
- What is Carol Grabowski's NPI number?
- Carol Grabowski's National Provider Identifier (NPI) is 1669582532, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carol Grabowski's specialty?
- Carol Grabowski is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Carol Grabowski located?
- Carol Grabowski's practice location on file with NPPES is 3925 N Gateway Dr, Appleton, WI 54913-7863.
- What is Carol Grabowski's phone number?
- The practice phone number listed in the NPPES registry for Carol Grabowski is (920) 749-1171.
- Does Carol Grabowski accept Medicare?
- Carol Grabowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carol Grabowski's NPI active?
- Yes — Carol Grabowski's NPI (1669582532) is active in the NPPES registry as of the last update on 2025-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.