John Michael Kaczmar, MD
Medical Oncology Physician · Charleston, SC
John Michael Kaczmar, MD is a medical oncology physician with a practice address in Charleston, South Carolina, and NPI 1134448079, issued on May 18, 2010. Check the license (South Carolina 40321, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Michael Kaczmar
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- 40321 SC
MT197543 PA
Self-reported in NPPES; status is on the state search - Practice location
- 171 Ashley Ave, Charleston, SC 29425
- Phone
- (843) 792-1414
- Enumerated
- May 18, 2010
- Record last updated
- Mar 10, 2022
- Medicare enrollment
- Enrolled (PECOS I20170407001401); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 35 in South Carolina → Look up another NPI →
Also registered at 171 Ashley Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrea Abbott, MDSurgical Oncology Physician1245473354
- Miguel Abboud, MDPediatric Hematology & Oncology Physician1619292851
- Ahmed Abdelkader, MD, PHDNephrology Physician1629743000
- Mohamed Abdelwahab, MDOtolaryngology Physician1528679768
- Anne Abel, MDChild Abuse Pediatrics Physician1043328990
- Christina Abrams, M.D.Pediatric Hematology & Oncology Physician1376920207
Verify John Michael Kaczmar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 40321Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average medical oncology physician in 2024
600 Medicare Part D claims for 115 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 49 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate89 claims
- Ondansetron Hcl81 claims
- Levothyroxine Sodium50 claims
- Oxycodone Hcl42 claims
- Prednisone40 claims
- Gabapentin23 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.
Industry payments in 2024: $3,078.63
12 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Pharmaceuticals, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University Medical Associates OF The Medical University OF South CarolMount Pleasant, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Michael Kaczmar among 35 medical oncology physician records in South Carolina
John Michael Kaczmar, MD is one of 35 medical oncology physician records with a practice address in South Carolina. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 83% of them.
- NPI issued2010 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 1999 among the 26 with a school on file
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in South Carolina
There are 35 medical oncology physician records in South Carolina.
All 35 in South Carolina → Every provider in Charleston → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Rebecca Bechhold, MDCharleston, SC 294251326031618
- Kevin Becker, MDCharleston, SC 294251023275633
- Frank Brescia, MDCharleston, SC 294251609984558
- Carolyn Britten, MDCharleston, SC 294251356375810
- Toros Dincman, MD, PHDCharleston, SC 294251457799454
- Harry Drabkin, MDCharleston, SC 294251477643153
- Theodore Gourdin, MDCharleston, SC 294251427225069
- Rita Kramer, MDCharleston, SC 294251144402942
Common questions
What is John Michael Kaczmar, MD's NPI number?
John Michael Kaczmar, MD's National Provider Identifier (NPI) is 1134448079, issued on May 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Kaczmar, MD located?
The NPPES record lists a practice address at 171 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-1414. Providers update this record themselves, so call before visiting.
How can I verify John Michael Kaczmar, MD's license?
NPPES lists South Carolina license number 40321, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Michael Kaczmar, MD prescribe under Medicare Part D?
In 2024, John Michael Kaczmar, MD had 600 Medicare Part D claims for 115 beneficiaries; the average among medical oncology physician prescribers was 703. 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.