Mark Gellman, DO
NPI 1669493375 · Emergency Medicine Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gellman, DO is a Emergency Medicine Physician provider in Torrance, CA (NPI 1669493375).
Provider details
- NPI number
- 1669493375
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A8207 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
647 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 140 | $97 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 117 | $137 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 80 | $120 |
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus87426 | 65 | $35 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 63 | $16 |
| X-Ray of Chest, 2 Views |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 62 | 59 |
| Doxycycline Monohydrate | 62 | 60 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 55 | 45 |
| Dexamethasone | 51 | 49 |
| Doxycycline Hyclate | 25 | 25 |
| Diph,pertuss(acell),tet Vac/Pfbrand: Adacel Tdap | 24 | 24 |
| Cephalexin | 21 | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2015-02-05
Frequently asked questions
- What is Mark Gellman's NPI number?
- Mark Gellman's National Provider Identifier (NPI) is 1669493375, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gellman's specialty?
- Mark Gellman is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gellman located?
- Mark Gellman's practice location on file with NPPES is 22411 Hawthorne Blvd, Torrance, CA 90505-2507.
- What is Mark Gellman's phone number?
- The practice phone number listed in the NPPES registry for Mark Gellman is (310) 784-3740.
- Does Mark Gellman accept Medicare?
- Mark Gellman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gellman's NPI active?
- Yes — Mark Gellman's NPI (1669493375) is active in the NPPES registry as of the last update on 2015-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.