James Ian Geller, M.D.

Pediatric Hematology & Oncology Physician · San Diego, CA

James Ian Geller, M.D. is a pediatric hematology & oncology physician with a practice address in San Diego, California, and NPI 1881625572, issued on Jul 5, 2006. Check the license (California C200028, 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

1881625572

Name: James Ian Geller
Credential: M.D.
Primary taxonomy: Pediatric Hematology & Oncology Physician 2080P0207X
License numbers: C200028 CA
35-084893 OH
Self-reported in NPPES; status is on the state search
Practice location: 3010 Childrens Way, San Diego, CA 92123
Phone: (858) 966-5811
Enumerated: Jul 5, 2006
Record last updated: Nov 19, 2024
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 3010 Childrens Way

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

Alicia Acosta, LCSWClinical Social Worker1285280297
Hyunah Ahn, M.D.Pediatric Hematology & Oncology Physician1255403879
Gali Aljadeff, MDPediatrics Physician1710565320
Eric Anderson, M.D.Pediatric Hematology & Oncology Physician1346312964
Maria Aristizabal, MDPediatric Hematology & Oncology Physician1154662583
Anna Balderas, CPNPPediatric Nurse Practitioner1679093405

Verify James Ian Geller in five checks

1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
2LicenseActive license and public ordersMedical Board of California
Search for license C200028Check the board
3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
5CertificationBoard certificationABMS AOA NCCPA AANPNot checked

Open the California license search

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James Ian Geller among 417 pediatric hematology & oncology physician records in California

James Ian Geller, 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 not. Its NPI, issued in 2006, is newer than 2% of them.

NPI issued2006 · 2% of these records are older, 65% newer
In a Medicare fileNo · 53% of these records are
In the CMS Doctors and Clinicians fileNo · 29% of these records are
Record last updated2024 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

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

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

Hyunah Ahn, M.D.San Diego, CA 921231255403879
Eric Anderson, M.D.San Diego, CA 921231346312964
Donald Durden, MD, PHDSan Diego, CA 921231841340395
Jennifer Elster, M.D.San Diego, CA 921231588866115
Richard Kadota, M.D.San Diego, CA 921231104997956
Jenny Kim, M.D.San Diego, CA 921231255402012
Dennis Kuo, M.D.San Diego, CA 921231750492146
Catherine Madigan, M.D.San Diego, CA 921231801950555

Common questions

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

James Ian Geller, M.D.'s National Provider Identifier (NPI) is 1881625572, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James Ian Geller, M.D. located?

The NPPES record lists a practice address at 3010 Childrens Way, San Diego, CA, 92123. Phone: (858) 966-5811. Providers update this record themselves, so call before visiting.

How can I verify James Ian Geller, M.D.'s license?

NPPES lists California license number C200028, 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.