John Harcha, MD
NPI 1639548589 · Hematology & Oncology Physician · Kettering, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Harcha, MD is a Hematology & Oncology Physician provider in Kettering, OH (NPI 1639548589).
Provider details
- NPI number
- 1639548589
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 57.249000 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 24 | — |
| Acyclovir | 21 | — |
| Ondansetron Hcl | 19 | 12 |
| Lenalidomidebrand: Revlimid | 18 | — |
| Prochlorperazine Maleate | 17 | — |
| Anastrozole | 14 | — |
| Abiraterone Acetate | 13 | — |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$671 across 8 records (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
- 2015-09-22
- Last updated
- 2023-03-21
- Certified
- 2023-03-21
Frequently asked questions
- What is John Harcha's NPI number?
- John Harcha's National Provider Identifier (NPI) is 1639548589, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Harcha's specialty?
- John Harcha is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Harcha located?
- John Harcha's practice location on file with NPPES is 3535 Southern Blvd, Kettering, OH 45429-1221.
- What is John Harcha's phone number?
- The practice phone number listed in the NPPES registry for John Harcha is (937) 395-8693.
- Does John Harcha accept Medicare?
- John Harcha is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Harcha's NPI active?
- Yes — John Harcha's NPI (1639548589) is active in the NPPES registry as of the last update on 2023-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.