NPPES file of Aug 9, 2026

Anita Koszyk-Szewczyk, M.D.

Hematology & Oncology Physician · Chandler, AZ

Anita Koszyk-Szewczyk, M.D. is a hematology & oncology physician with a practice address in Chandler, Arizona, and NPI 1487871786, issued on Apr 19, 2007. Check the license (Arizona 41606, as entered in NPPES) on the Arizona Medical Board; 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
1487871786
Name
Anita Koszyk-Szewczyk
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
41606 AZ
Self-reported in NPPES; status is on the state search
Practice location
695 S Dobson RD, Chandler, AZ 85224
Phone
(480) 821-2838
Enumerated
Apr 19, 2007
Record last updated
Nov 15, 2022
Fax
(480) 821-9444
Medicare enrollment
Enrolled (PECOS I20090727000423); accepts Medicare assignment
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 hematology & oncology physician records → All 285 in Arizona → Look up another NPI →

Also registered at 695 S Dobson RD

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

  1. Jennifer Bernt, FNPFamily Nurse Practitioner1336641463
  2. Alexis Bethel, NPNurse Practitioner1245175553
  3. Puneet Bhalla, M.D.Medical Oncology Physician1336115542
  4. Ian Deroock, M.D.Hematology & Oncology Physician1114900479
  5. Azam Farooqui, M.D.Hematology & Oncology Physician1265846513
  6. Brenda Gridley, R.D.Registered Dietitian1003931064

Verify Anita Koszyk-Szewczyk in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 41606    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 Arizona license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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71% more Medicare Part D claims than the average hematology & oncology physician in 2024

1,498 Medicare Part D claims for 326 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 37 claims were for opioids.

  1. Anita Koszyk-Szewczyk1,498
  2. Specialty average877

Most prescribed

  1. Anastrozole407 claims
  2. Eliquis112 claims
  3. Letrozole56 claims
  4. Tamoxifen Citrate46 claims
  5. Xarelto46 claims
  6. Hydroxyurea45 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: $3,087.96

153 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Anita Koszyk-Szewczyk$3,087.96
  2. Specialty average$7,481.41

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

  1. Ironwood Physicians PCChandler, AZ

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

Anita Koszyk-Szewczyk among 285 hematology & oncology physician records in Arizona

Anita Koszyk-Szewczyk, M.D. is one of 285 hematology & oncology physician records with a practice address in Arizona. 85% 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 42% of them.

  • NPI issued2007 · 42% of these records are older, 48% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 80% of these records are
  • Graduated2001 · median 2003 among the 229 with a school on file
  • Record last updated2022 · 37% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Arizona

There are 285 hematology & oncology physician records in Arizona.

All 285 in Arizona → Every provider in Chandler → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Ian Deroock, M.D.Chandler, AZ 852241114900479
  2. Azam Farooqui, M.D.Chandler, AZ 852241265846513
  3. Quillan Huang, M.D.Chandler, AZ 852241215270947
  4. Sujith Kalmadi, MDChandler, AZ 852241508973447
  5. Christopher Kellogg, MDChandler, AZ 852241740254457
  6. Parvinderjit Khanuja, MDChandler, AZ 852241053385765
  7. Karen Ortiz Cruz, M.D.Chandler, AZ 852241912168535
  8. Mikhail Shtivelband, MDChandler, AZ 852241740254473

Common questions

What is Anita Koszyk-Szewczyk, M.D.'s NPI number?

Anita Koszyk-Szewczyk, M.D.'s National Provider Identifier (NPI) is 1487871786, issued on Apr 19, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Anita Koszyk-Szewczyk, M.D. located?

The NPPES record lists a practice address at 695 S Dobson RD, Chandler, AZ, 85224. Phone: (480) 821-2838. Providers update this record themselves, so call before visiting.

How can I verify Anita Koszyk-Szewczyk, M.D.'s license?

NPPES lists Arizona license number 41606, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Anita Koszyk-Szewczyk, M.D. prescribe under Medicare Part D?

In 2024, Anita Koszyk-Szewczyk, M.D. had 1,498 Medicare Part D claims for 326 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.