Joanna Grabska, MD
NPI 1144546557 · Hematology & Oncology Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Grabska, MD is a Hematology & Oncology Physician provider in Greenville, SC (NPI 1144546557).
Provider details
- NPI number
- 1144546557
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 40623 (SC)
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
16 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
844 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 | 256 | $120 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 160 | $169 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 91 | $72 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 90 | $85 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 88 | $112 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 221 | 75 |
| Anastrozole | 151 | 51 |
| Tamoxifen Citrate | 77 | 30 |
| Rivaroxabanbrand: Xarelto | 40 | — |
| Exemestane | 39 | 12 |
| Palbociclibbrand: Ibrance | 34 | — |
| Potassium Chloride | 25 | 13 |
| Warfarin Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-04-09
- Last updated
- 2022-07-21
Frequently asked questions
- What is Joanna Grabska's NPI number?
- Joanna Grabska's National Provider Identifier (NPI) is 1144546557, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Grabska's specialty?
- Joanna Grabska is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Grabska located?
- Joanna Grabska's practice location on file with NPPES is 104 Innovation Dr. Ste. 2000, Greenville, SC 29607-5253.
- What is Joanna Grabska's phone number?
- The practice phone number listed in the NPPES registry for Joanna Grabska is (864) 603-6300.
- Does Joanna Grabska accept Medicare?
- Joanna Grabska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Grabska's NPI active?
- Yes — Joanna Grabska's NPI (1144546557) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.