NPPES file of Aug 9, 2026

Ian Deroock, M.D.

Hematology & Oncology Physician · Chandler, AZ

Ian Deroock, M.D. is a hematology & oncology physician with a practice address in Chandler, Arizona, and NPI 1114900479, issued on Nov 21, 2005. Check the license (Arizona 41596, 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
1114900479
Name
Ian Deroock
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
41596 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
Nov 21, 2005
Record last updated
Jun 4, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(480) 821-9444
Medicaid ID
436811 AZ
Medicare enrollment
Enrolled (PECOS I20090817000795); accepts Medicare assignment
Medical or professional school
University Of Arizona College Of Medicine, 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 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. Azam Farooqui, M.D.Hematology & Oncology Physician1265846513
  5. Brenda Gridley, R.D.Registered Dietitian1003931064
  6. Eric Gross, MDRadiation Oncology Physician1336135516

Verify Ian Deroock in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 41596    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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87% more Medicare Part D claims than the average hematology & oncology physician in 2024

1,642 Medicare Part D claims for 227 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims. 98 claims were for opioids.

  1. Ian Deroock1,642
  2. Specialty average877

Most prescribed

  1. Eliquis158 claims
  2. Acyclovir114 claims
  3. Xarelto99 claims
  4. Dexamethasone91 claims
  5. Sulfamethoxazole-Trimethoprim72 claims
  6. Prednisone65 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: $3,330.94

135 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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. Ian Deroock$3,330.94
  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 PCCasa Grande, AZ

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

Ian Deroock among 285 hematology & oncology physician records in Arizona

Ian Deroock, 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 92% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 80% of these records are
  • Graduated2003 · median 2003 among the 229 with a school on file
  • Record last updated2014 · 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. Azam Farooqui, M.D.Chandler, AZ 852241265846513
  2. Quillan Huang, M.D.Chandler, AZ 852241215270947
  3. Sujith Kalmadi, MDChandler, AZ 852241508973447
  4. Christopher Kellogg, MDChandler, AZ 852241740254457
  5. Parvinderjit Khanuja, MDChandler, AZ 852241053385765
  6. Anita Koszyk-Szewczyk, M.D.Chandler, AZ 852241487871786
  7. Karen Ortiz Cruz, M.D.Chandler, AZ 852241912168535
  8. Mikhail Shtivelband, MDChandler, AZ 852241740254473

Common questions

What is Ian Deroock, M.D.'s NPI number?

Ian Deroock, M.D.'s National Provider Identifier (NPI) is 1114900479, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Ian Deroock, 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 Ian Deroock, M.D.'s license?

NPPES lists Arizona license number 41596, 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 Ian Deroock, M.D. prescribe under Medicare Part D?

In 2024, Ian Deroock, M.D. had 1,642 Medicare Part D claims for 227 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.