Steven Edward Kossman, M.D.
Hematology & Oncology Physician · San Diego, CA
Steven Edward Kossman, M.D. is a hematology & oncology physician with a practice address in San Diego, California, and NPI 1477628634, issued on Nov 22, 2006. Check the license (California G85236, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Edward Kossman
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G85236 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 Reservoir Dr Ste 306, San Diego, CA 92120
- Phone
- (619) 287-9910
- Enumerated
- Nov 22, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (619) 287-3526
- Medicare enrollment
- Enrolled (PECOS I20100820000948); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Verify Steven Edward Kossman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G85236Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
278 Medicare Part D claims for 82 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Azithromycin21 claims
- Duloxetine Hcl17 claims
- Ondansetron Hcl17 claims
- Prochlorperazine Maleate15 claims
- Letrozole13 claims
- Prednisone13 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Medical Oncology Associates OF San Diego A Medical Group IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Edward Kossman among 1,583 hematology & oncology physician records in California
Steven Edward Kossman, M.D. 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. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1993 · median 2003 among the 1,124 with a school on file
- Record last updated2023 · 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.
All 1,583 in California → Every provider in San Diego → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jenny Devitt, MDSan Diego, CA 921201134296098
- Scott Godfrey, DOSan Diego, CA 921201659464089
- Charles Kossman, M.D.San Diego, CA 921201184799892
- Nina Liu, MDSan Diego, CA 921201801944756
- Stephanie OssowskiSan Diego, CA 921201417301482
- John Oval, MDSan Diego, CA 921201720136617
- Dean Peng, MDSan Diego, CA 921201235298811
- Nandita Raja, MDSan Diego, CA 921201114079571
Common questions
What is Steven Edward Kossman, M.D.'s NPI number?
Steven Edward Kossman, M.D.'s National Provider Identifier (NPI) is 1477628634, issued on Nov 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Edward Kossman, M.D. located?
The NPPES record lists a practice address at 5555 Reservoir Dr Ste 306, San Diego, CA, 92120. Phone: (619) 287-9910. Providers update this record themselves, so call before visiting.
How can I verify Steven Edward Kossman, M.D.'s license?
NPPES lists California license number G85236, 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.
How much does Steven Edward Kossman, M.D. prescribe under Medicare Part D?
In 2024, Steven Edward Kossman, M.D. had 278 Medicare Part D claims for 82 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Steven Edward Kossman, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.