John Michael Chacko, DO
Emergency Medicine Physician · Boardman, OH
John Michael Chacko, DO is an emergency medicine physician with a practice address in Boardman, Ohio, and NPI 1427630839, issued on Apr 26, 2021. Check the license (Ohio 58.032281, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- John Michael Chacko
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 58.032281 OH
339403 NY
Self-reported in NPPES; status is on the state search - Practice location
- 8401 Market St, Boardman, OH 44512
- Phone
- (469) 585-4521
- Enumerated
- Apr 26, 2021
- Record last updated
- Sep 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20250926002162); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,002 in Ohio → Look up another NPI →
Also registered at 8401 Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Michael Chacko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 58.032281Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average emergency medicine physician in 2024
201 Medicare Part D claims for 131 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Cefdinir33 claims
- Ondansetron Hcl25 claims
- Prednisone25 claims
- Doxycycline Hyclate17 claims
- Hydrocodone-Acetaminophen16 claims
- Dicyclomine Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Emergency Physician Services OF New York, P.C.Poughkeepsie, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Michael Chacko among 3,002 emergency medicine physician records in Ohio
John Michael Chacko, DO is one of 3,002 emergency medicine physician records with a practice address in Ohio. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2021 · median 2013 among the 1,720 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 emergency medicine physician records list a practice address in Boardman
They are 55 of the 1,130 NPPES records with a practice address in Boardman, and 3,002 emergency medicine physician records in Ohio.
All 3,002 in Ohio → Every provider in Boardman → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Albert Aiad-Toss, M.D.Youngstown, OH 445121568447332
- Jeanine Awad-Spirtos, M.D.Youngstown, OH 445121023429453
- Mary Ellen Barringer, DOYoungstown, OH 445121730164682
- Bianca Chun, MDBoardman, OH 445121649534470
- Michael Cone, D.O.Boardman, OH 445121336180868
- Orlando Cortez, MDBoardman, OH 445121326276825
- Charles FarrellBoardman, OH 445121174917900
- Rhett Ketschke, DOBoardman, OH 445121215275110
Common questions
What is John Michael Chacko, DO's NPI number?
John Michael Chacko, DO's National Provider Identifier (NPI) is 1427630839, issued on Apr 26, 2021. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Chacko, DO located?
The NPPES record lists a practice address at 8401 Market St, Boardman, OH, 44512. Phone: (469) 585-4521. Providers update this record themselves, so call before visiting.
How can I verify John Michael Chacko, DO's license?
NPPES lists Ohio license number 58.032281, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Michael Chacko, DO prescribe under Medicare Part D?
In 2024, John Michael Chacko, DO had 201 Medicare Part D claims for 131 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.