NPPES file of Aug 9, 2026

Onyekachi Chika Hammack, M.D.

Pediatrics Physician · Mt Pleasant, MI

Onyekachi Chika Hammack, M.D. is a pediatrics physician with a practice address in Mt Pleasant, Michigan, and NPI 1720348287, issued on May 17, 2012. Check the license (Michigan 4301109582, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1720348287
Name
Onyekachi Chika Hammack
Credential
M.D.
Primary taxonomy
Pediatrics Physician 208000000X
License number
4301109582 MI
Self-reported in NPPES; status is on the state search
Practice location
2790 Health Pkwy, Mt Pleasant, MI 48858
Phone
(989) 779-5270
Enumerated
May 17, 2012
Record last updated
Feb 13, 2025
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatrics physician records → All 2,180 in Michigan → Look up another NPI →

Also registered at 2790 Health Pkwy

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Shamel Amin, M.D.Pediatric Gastroenterology Physician1104289743
  2. Akanksha Ashwini, MDFamily Medicine Physician1790312890
  3. Sarah BattagliaCounselor1508488073
  4. Whitney Brooks-Huntoon, LMSW, CADCSocial Worker1801432695
  5. Derek GagerCommunity Health Worker1114793973
  6. Tara HeraldCommunity Health Worker1033985882

Verify Onyekachi Chika Hammack in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301109582    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

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Industry payments in 2024: $19.85

1 payment: food and beverage; the largest payer was Pfizer Inc. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Onyekachi Hammack$19.85
  2. Specialty average$842.05

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Onyekachi Chika Hammack among 2,180 pediatrics physician records in Michigan

Onyekachi Chika Hammack, M.D. is one of 2,180 pediatrics physician records with a practice address in Michigan. 38% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 65% of them.

  • NPI issued2012 · 65% of these records are older, 33% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileNo · 11% of these records are
  • Record last updated2025 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatrics Physician providers in Michigan

There are 2,180 pediatrics physician records in Michigan.

All 2,180 in Michigan → Every provider in Mt Pleasant → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Afreen Abraham, MDMount Pleasant, MI 488581811559172
  2. Rumana Barodawalla, M.D.Mt Pleasant, MI 488581144342320
  3. Constanza Fox, MDMount Pleasant, MI 488581831157734
  4. Bhekumusa Msibi, D.O.Mt Pleasant, MI 488581649212952
  5. Shekha Sherin Nelliadi, MDMount Pleasant, MI 488581386301729
  6. Shreya Wachob, DOMount Pleasant, MI 488581497137012
  7. Steven Walvisch, MDMount Pleasant, MI 488581497792238
  8. Lewis Resnick, MDMason, MI 488541386653566

Common questions

What is Onyekachi Chika Hammack, M.D.'s NPI number?

Onyekachi Chika Hammack, M.D.'s National Provider Identifier (NPI) is 1720348287, issued on May 17, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Onyekachi Chika Hammack, M.D. located?

The NPPES record lists a practice address at 2790 Health Pkwy, Mt Pleasant, MI, 48858. Phone: (989) 779-5270. Providers update this record themselves, so call before visiting.

How can I verify Onyekachi Chika Hammack, M.D.'s license?

NPPES lists Michigan license number 4301109582, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.