NPPES file of Aug 9, 2026

Chandana Javvaji, M.D.

Hematology & Oncology Physician · Sioux City, IA

Chandana Javvaji, M.D. is a hematology & oncology physician with a practice address in Sioux City, Iowa, and NPI 1821437716, issued on Jun 24, 2013. Check the license (Iowa 45820, as entered in NPPES) on the Iowa Board of Medicine; 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
1821437716
Name
Chandana Javvaji
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License numbers
45820 IA
70097431 WA
Self-reported in NPPES; status is on the state search
Practice location
230 Nebraska St, Sioux City, IA 51101
Phone
(712) 252-0088
Enumerated
Jun 24, 2013
Record last updated
May 13, 2026
Medicare enrollment
Enrolled (PECOS I20190715003412); 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 90 in Iowa → Look up another NPI →

Also registered at 230 Nebraska St

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

  1. August Anderson, MDRadiation Oncology Physician1093342859
  2. Shari Black, CNPAdult Health Nurse Practitioner1831152925
  3. Cynthia Jurado Marquez, ARNPFamily Nurse Practitioner1972337608
  4. Stephen Kahanic, MDHematology & Oncology Physician1962474155
  5. Muaiad Kittaneh, M.D.Medical Oncology Physician1730350794
  6. Yat Lau, MDRadiation Oncology Physician1235234279

Verify Chandana Javvaji in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIowa Board of Medicine
    Search for license 45820    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 Iowa 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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83% more Medicare Part D claims than the average hematology & oncology physician in 2024

1,604 Medicare Part D claims for 287 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 70 claims were for opioids.

  1. Chandana Javvaji1,604
  2. Specialty average877

Most prescribed

  1. Anastrozole382 claims
  2. Acyclovir69 claims
  3. Letrozole66 claims
  4. Dexamethasone62 claims
  5. Alendronate Sodium60 claims
  6. Imbruvica58 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: $382.65

21 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. 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. Chandana Javvaji$382.65
  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 2 group practices

  1. Northwest Iowa Hospital CorporationSioux City, IA
  2. Siouxland Regional Cancer CenterSioux City, IA

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

Chandana Javvaji among 90 hematology & oncology physician records in Iowa

Chandana Javvaji, M.D. is one of 90 hematology & oncology physician records with a practice address in Iowa. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 74% of them.

  • NPI issued2013 · 74% of these records are older, 21% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 61% of these records are
  • Graduated2010 · median 2003 among the 55 with a school on file
  • Record last updated2026 · 60% 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 Iowa 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 Iowa

There are 90 hematology & oncology physician records in Iowa.

All 90 in Iowa → Every provider in Sioux City → Hematology & Oncology Physician nationwide →

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

  1. Stephen Kahanic, MDSioux City, IA 511011962474155
  2. John Michalak, M.D.Sioux City, IA 511011497727663
  3. Radha Rao, M.D.Sioux City, IA 511011699746016
  4. Donald Wender, M.D.Sioux City, IA 511011861463275
  5. Glenn Preston, M.D.Spencer, IA 513011194796243
  6. Mukund Nadipuram, MDWaterloo, IA 507021962444349
  7. Hussain Naseri, M.D.Waterloo, IA 507021154646149
  8. Jasjeet Sangha, MDWaterloo, IA 507011215980602

Common questions

What is Chandana Javvaji, M.D.'s NPI number?

Chandana Javvaji, M.D.'s National Provider Identifier (NPI) is 1821437716, issued on Jun 24, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Chandana Javvaji, M.D. located?

The NPPES record lists a practice address at 230 Nebraska St, Sioux City, IA, 51101. Phone: (712) 252-0088. Providers update this record themselves, so call before visiting.

How can I verify Chandana Javvaji, M.D.'s license?

NPPES lists Iowa license number 45820, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Chandana Javvaji, M.D. prescribe under Medicare Part D?

In 2024, Chandana Javvaji, M.D. had 1,604 Medicare Part D claims for 287 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.