NPPES file of Aug 9, 2026

Gregory S. Krivonyak, M.D.

Preventive Medicine/Occupational Environmental Medicine Physician · Chesterfield, MO

Gregory S. Krivonyak, M.D. is a preventive medicine/occupational environmental medicine physician with a practice address in Chesterfield, Missouri, and NPI 1770772725, issued on Oct 16, 2007. Check the license (Missouri 2023041829, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; 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
1770772725
Name
Gregory S. Krivonyak
Credential
M.D.
Primary taxonomy
Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
License numbers
2023041829 MO
036163835 IL
Self-reported in NPPES; status is on the state search
Practice location
100 Chesterfield Business Pkwy FL 2, Chesterfield, MO 63005
Phone
(954) 399-4673
Enumerated
Oct 16, 2007
Record last updated
Jun 18, 2025
Fax
(352) 323-2261
Medicare enrollment
Enrolled (PECOS I20240210000168); accepts Medicare assignment
Medical or professional school
Jc Edwards School Of Medicine, Marshall University, 2003
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest preventive medicine/occupational environmental medicine physician records → All 17 in Missouri → Look up another NPI →

Also registered at 100 Chesterfield Business Pkwy FL 2

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

  1. Andrea Abbott, FNP-CFamily Nurse Practitioner1588003842
  2. Brenda DavisSocial Worker1699484162
  3. E.l. Domingo-Johnson, MDGeneral Practice Physician1215516752
  4. Annelise Hardy, DCChiropractor1811843238
  5. Tylor Kersten, MDGeneral Practice Physician1780179002

Verify Gregory S. Krivonyak in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2023041829    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 Missouri license search

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22% more Medicare Part D claims than the average preventive medicine/occupational environmental medicine physician in 2024

765 Medicare Part D claims for 437 beneficiaries, against an average of 626 among the 189 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.

  1. Gregory Krivonyak765
  2. Specialty average626

Most prescribed

  1. Prednisone258 claims
  2. Azithromycin139 claims
  3. Amoxicillin60 claims
  4. Amoxicillin-Clavulanate Potass44 claims
  5. Doxycycline Hyclate34 claims
  6. Cefdinir33 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

  1. Vohra Wound Physicians OF FL LLCJefferson City, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gregory S. Krivonyak among 17 preventive medicine/occupational environmental medicine physician records in Missouri

Gregory S. Krivonyak, M.D. is one of 17 preventive medicine/occupational environmental medicine physician records with a practice address in Missouri. 24% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 71% of them.

  • NPI issued2007 · 71% of these records are older, 12% newer
  • In a Medicare fileYes · 24% of these records are
  • In the CMS Doctors and Clinicians fileYes · 6% of these records are
  • Record last updated2025 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0500X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Preventive Medicine/Occupational Environmental Medicine Physician providers in Missouri

There are 17 preventive medicine/occupational environmental medicine physician records in Missouri.

All 17 in Missouri → Every provider in Chesterfield → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →

The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes

  1. Melissa Bean, DO, MBA, MPH, FACOEMHazelwood, MO 630421609978261
  2. Karen Shockley, MDSaint Louis, MO 631101326250143
  3. Leslie Tharenos, MD, MPHSaint Louis, MO 631101972684264
  4. Belisario Cabanilla, MDSaint Louis, MO 631671659677656
  5. Paul Dew, D.O.Kansas City, MO 641141679528673
  6. Timothy Kloiber, D.O.Parkville, MO 641521386731388
  7. Scott Steelman, D.O.Kansas City, MO 641581275513236
  8. Jeanne Abbott, DOOsage Beach, MO 650651669467221

Common questions

What is Gregory S. Krivonyak, M.D.'s NPI number?

Gregory S. Krivonyak, M.D.'s National Provider Identifier (NPI) is 1770772725, issued on Oct 16, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Gregory S. Krivonyak, M.D. located?

The NPPES record lists a practice address at 100 Chesterfield Business Pkwy FL 2, Chesterfield, MO, 63005. Phone: (954) 399-4673. Providers update this record themselves, so call before visiting.

How can I verify Gregory S. Krivonyak, M.D.'s license?

NPPES lists Missouri license number 2023041829, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Gregory S. Krivonyak, M.D. prescribe under Medicare Part D?

In 2024, Gregory S. Krivonyak, M.D. had 765 Medicare Part D claims for 437 beneficiaries; the average among preventive medicine/occupational environmental medicine physician prescribers was 626. 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.

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.