Mark Gellman, DO
Emergency Medicine Physician · Torrance, CA
Mark Gellman, DO is an emergency medicine physician with a practice address in Torrance, California, and NPI 1669493375, issued on Jul 21, 2006. Check the license (California 20A8207, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Gellman
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A8207 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22411 Hawthorne Blvd, Torrance, CA 90505
- Phone
- (310) 784-3740
- Enumerated
- Jul 21, 2006
- Record last updated
- Feb 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (310) 375-1392
- Medicare enrollment
- Enrolled (PECOS I20060203000438); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 22411 Hawthorne Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Genevieve Hasek, M.D.Emergency Medicine Physician1780848085
- Glenn Newman, M.D.Family Medicine Physician1568433274
Verify Mark Gellman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8207Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average emergency medicine physician in 2024
533 Medicare Part D claims for 285 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cefdinir62 claims
- Doxycycline Monohydrate62 claims
- Albuterol Sulfate Hfa55 claims
- Dexamethasone51 claims
- Doxycycline Hyclate25 claims
- Adacel Tdap24 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.
Bills Medicare through one group practice
- Torrance Health Association IncEl Segundo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Gellman among 7,751 emergency medicine physician records in California
Mark Gellman, DO is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1994 · median 2011 among the 4,560 with a school on file
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
197 emergency medicine physician records list a practice address in Torrance
They are 197 of the 8,901 NPPES records with a practice address in Torrance, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Torrance → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Elisa Anhalt, MDTorrance, CA 905051194773424
- Ellen BakerTorrance, CA 905051588612477
- Michael Baker, MDTorrance, CA 905051922030238
- Darren Bedolla, MDTorrance, CA 905051114956299
- Robert Gibbs, MDTorrance, CA 905051043326366
- Kane Kuo, M.D.Torrance, CA 905051588600993
- Brett Lorber, MDTorrance, CA 905051225148042
- Sara May, MDTorrance, CA 905051457377707
Common questions
What is Mark Gellman, DO's NPI number?
Mark Gellman, DO's National Provider Identifier (NPI) is 1669493375, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gellman, DO located?
The NPPES record lists a practice address at 22411 Hawthorne Blvd, Torrance, CA, 90505. Phone: (310) 784-3740. Providers update this record themselves, so call before visiting.
How can I verify Mark Gellman, DO's license?
NPPES lists California license number 20A8207, 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 Mark Gellman, DO prescribe under Medicare Part D?
In 2024, Mark Gellman, DO had 533 Medicare Part D claims for 285 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.
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.