NPPES file of Aug 9, 2026

Lance Sieger, M.D.

Pediatric Hematology & Oncology Physician · Torrance, CA

Lance Sieger, M.D. is a pediatric hematology & oncology physician with a practice address in Torrance, California, and NPI 1134130248, issued on Aug 11, 2006. Check the license (California G20454, as entered in NPPES) on the Medical Board of California; 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
1134130248
Name
Lance Sieger
Credential
M.D.
Primary taxonomy
Pediatric Hematology & Oncology Physician 2080P0207X
License number
G20454 CA
Self-reported in NPPES; status is on the state search
Practice location
21840 Normandie Ave, Torrance, CA 90502
Phone
(310) 222-4154
Enumerated
Aug 11, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
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 pediatric hematology & oncology physician records → All 417 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 Lance Sieger in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G20454    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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Industry payments in 2024: $125.00

1 payment: food and beverage; the largest payer was Guerbet LLC. The 1,215 providers of this specialty with any payment received $7,404.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Lance Sieger$125.00
  2. Specialty average$7,404.07

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Lance Sieger among 417 pediatric hematology & oncology physician records in California

Lance Sieger, M.D. is one of 417 pediatric hematology & oncology physician records with a practice address in California. 53% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.

  • NPI issued2006 · 2% of these records are older, 65% newer
  • In a Medicare fileYes · 53% of these records are
  • In the CMS Doctors and Clinicians fileNo · 29% 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 2080P0207X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Hematology & Oncology Physician providers in California

There are 417 pediatric hematology & oncology physician records in California.

All 417 in California → Every provider in Torrance → Pediatric Hematology & Oncology Physician nationwide →

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

  1. Moran Gotesman, MDTorrance, CA 905021225326903
  2. Wendy Tcheng, M.D.Torrance, CA 905021508991316
  3. Erlinda Gordon, MDSanta Monica, CA 904031922191717
  4. Eric Kawaoka, MDBellflower, CA 907061902977960
  5. Diana Moke, M.D.Bellflower, CA 907061508152794
  6. Willye Powell, MDBellflower, CA 907061447319108
  7. Leonard Sender, MDEl Segundo, CA 902451952499741
  8. Naveen Qureshi, M.D.Downey, CA 902421962652016

Common questions

What is Lance Sieger, M.D.'s NPI number?

Lance Sieger, M.D.'s National Provider Identifier (NPI) is 1134130248, issued on Aug 11, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Lance Sieger, M.D. located?

The NPPES record lists a practice address at 21840 Normandie Ave, Torrance, CA, 90502. Phone: (310) 222-4154. Providers update this record themselves, so call before visiting.

How can I verify Lance Sieger, M.D.'s license?

NPPES lists California license number G20454, 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. 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.