John Chacko, DO
NPI 1427630839 · Emergency Medicine Physician · Boardman, OH
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chacko, DO is a Emergency Medicine Physician provider in Boardman, OH (NPI 1427630839).
Provider details
- NPI number
- 1427630839
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 58.032281 (OH)
Specialties & taxonomies
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
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 33 | 33 |
| Prednisone | 25 | 24 |
| Ondansetron Hcl | 25 | 25 |
| Doxycycline Hyclate | 17 | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 16 | 16 |
| Dicyclomine Hcl | 13 | 13 |
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 , 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 (2)
- 667 Eastland Ave SeWarren, OH 44484-4503Phone: (469) 585-4521
- 1044 Belmont AveYoungstown, OH 44504-1006Phone: (469) 585-4521
Registry dates
- Enumerated
- 2021-04-26
- Last updated
- 2025-09-15
- Certified
- 2025-09-15
Frequently asked questions
- What is John Chacko's NPI number?
- John Chacko's National Provider Identifier (NPI) is 1427630839, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chacko's specialty?
- John Chacko is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Chacko located?
- John Chacko's practice location on file with NPPES is 8401 Market St, Boardman, OH 44512-6725.
- What is John Chacko's phone number?
- The practice phone number listed in the NPPES registry for John Chacko is (469) 585-4521.
- Does John Chacko accept Medicare?
- John Chacko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chacko's NPI active?
- Yes — John Chacko's NPI (1427630839) is active in the NPPES registry as of the last update on 2025-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.