John Kessler, MD
NPI 1598760274 · Hematology & Oncology Physician · Cambridge, OH
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kessler, MD is a Hematology & Oncology Physician provider in Cambridge, OH (NPI 1598760274).
Provider details
- NPI number
- 1598760274
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35.059610 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 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
76 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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 29 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 23 | $10 |
| Immunologic Analysis for Detection of Tumor Antigen, Quantitative; Ca 15-386300 | 13 | $20 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 11 | $14 |
Typical Medicare-allowed amounts for these services range $8–$20 (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.
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) | Beneficiaries |
|---|---|---|
| Letrozole | 27 | 13 |
| Rivaroxabanbrand: Xarelto | 17 | — |
| Anastrozole | 11 | — |
| Zanubrutinibbrand: Brukinsa | 11 | — |
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)
- 1051 Loftis BlvdSuite 100Newport News, VA 23606-3069Phone: (757) 873-9400Fax: (757) 873-9420
Registry dates
- Enumerated
- 2005-06-17
- Last updated
- 2026-04-07
- Certified
- 2026-04-07
Frequently asked questions
- What is John Kessler's NPI number?
- John Kessler's National Provider Identifier (NPI) is 1598760274, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kessler's specialty?
- John Kessler is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Kessler located?
- John Kessler's practice location on file with NPPES is 1455 Clark St, Cambridge, OH 43725-9617.
- What is John Kessler's phone number?
- The practice phone number listed in the NPPES registry for John Kessler is (740) 439-2771.
- Does John Kessler accept Medicare?
- John Kessler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kessler's NPI active?
- Yes — John Kessler's NPI (1598760274) is active in the NPPES registry as of the last update on 2026-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.