NPPES file of Aug 9, 2026

Rowan Chlebowski, M.D., PHD

Hematology & Oncology Physician · Torrance, CA

Rowan Chlebowski, M.D., PHD is a hematology & oncology physician with a practice address in Torrance, California, and NPI 1902876386, issued on Jan 26, 2006. Check the license (California G33222, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1902876386
Name
Rowan Chlebowski
Credential
M.D., PHD
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
G33222 CA
Self-reported in NPPES; status is on the state search
Practice location
21840 Normandie Ave, Torrance, CA 90502
Phone
(310) 222-5101
Enumerated
Jan 26, 2006
Record last updated
Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(310) 320-5463
Medicaid ID
00G332220 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →

Also registered at 21840 Normandie Ave

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

  1. Sudhir Anand, M.D.Pediatric Nephrology Physician1750360426
  2. Thomas Anderson, MDNeurology Physician1750304234
  3. Morris Asch, M.D.Pediatric Surgery Physician1619957784
  4. Lilly Barba, M.D.Nephrology Physician1407835978
  5. Peter Barrett, M.D.Internal Medicine Physician1568441954
  6. Barry Baylen, M.D.Pediatric Cardiology Physician1346229879

Verify Rowan Chlebowski in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G33222    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 California 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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Rowan Chlebowski among 1,583 hematology & oncology physician records in California

Rowan Chlebowski, M.D., PHD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.

  • NPI issued2006 · 8% of these records are older, 54% newer
  • In a Medicare fileNo · 83% of these records are
  • In the CMS Doctors and Clinicians fileNo · 71% of these records are
  • Record last updated2007 · 58% 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 California 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 California

There are 1,583 hematology & oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,583 in California → Every provider in Torrance → Hematology & Oncology Physician nationwide →

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

  1. Bryan Chan, MD, MPHTorrance, CA 905021518699982
  2. Marcin Dragan, M.D.Torrance, CA 905021508354358
  3. Charity Huang, MDTorrance, CA 905021891157657
  4. Andrew Hwang, MDTorrance, CA 905021154858694
  5. Jennifer Lee, M.D.Torrance, CA 905021164798062
  6. Yenmay LouTorrance, CA 905021679766042
  7. Yutaka Niihara, M.D.Torrance, CA 905021467480459
  8. Kouichi Tanaka, M.D.Torrance, CA 905021174677637

Common questions

What is Rowan Chlebowski, M.D., PHD's NPI number?

Rowan Chlebowski, M.D., PHD's National Provider Identifier (NPI) is 1902876386, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rowan Chlebowski, M.D., PHD located?

The NPPES record lists a practice address at 21840 Normandie Ave, Torrance, CA, 90502. Phone: (310) 222-5101. Providers update this record themselves, so call before visiting.

How can I verify Rowan Chlebowski, M.D., PHD's license?

NPPES lists California license number G33222, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.