John Korleski, MD
NPI 1134766959 · Hematology & Oncology Physician · Rochester, MN
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Korleski, MD is a Hematology & Oncology Physician provider in Rochester, MN (NPI 1134766959).
Provider details
- NPI number
- 1134766959
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32704 (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 tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 27 |
| Empagliflozinbrand: Jardiance | 16 |
| Losartan Potassium | 13 |
| Levothyroxine Sodium | 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)
- 600 N Wolfe StBaltimore, MD 21287-0005Phone: (410) 955-5000
Registry dates
- Enumerated
- 2019-12-01
- Last updated
- 2025-06-16
- Certified
- 2025-06-16
Frequently asked questions
- What is John Korleski's NPI number?
- John Korleski's National Provider Identifier (NPI) is 1134766959, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Korleski's specialty?
- John Korleski is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Korleski located?
- John Korleski's practice location on file with NPPES is 200 1st St Sw, Rochester, MN 55905-0001.
- What is John Korleski's phone number?
- The practice phone number listed in the NPPES registry for John Korleski is (507) 284-2511.
- Does John Korleski accept Medicare?
- John Korleski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Korleski's NPI active?
- Yes — John Korleski's NPI (1134766959) is active in the NPPES registry as of the last update on 2025-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.