Christopher Tomassian, MD
NPI 1871097550 · Dermatology Physician · Glendora, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Tomassian, MD is a Dermatology Physician provider in Glendora, CA (NPI 1871097550).
Provider details
- NPI number
- 1871097550
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 177939 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,597 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 616 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 239 | $99 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 167 | $55 |
| Destruction of Skin Growth, 1-14 Growths17110 | 149 | $128 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 116 | $120 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 263 | 112 |
| Triamcinolone Acetonide | 215 | 148 |
| Clobetasol Propionate | 78 | 58 |
| Hydrocortisone | 74 | 54 |
| Dupilumabbrand: Dupixent Pen | 59 | — |
| Doxycycline Monohydrate | 54 | 40 |
| Betamethasone Dipropionate | 48 | 28 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44,419 across 59 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-19
- Last updated
- 2022-08-24
- Certified
- 2022-08-24
Frequently asked questions
- What is Christopher Tomassian's NPI number?
- Christopher Tomassian's National Provider Identifier (NPI) is 1871097550, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Tomassian's specialty?
- Christopher Tomassian is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Tomassian located?
- Christopher Tomassian's practice location on file with NPPES is 552 W Foothill Blvd Ste 202, Glendora, CA 91741-2470.
- What is Christopher Tomassian's phone number?
- The practice phone number listed in the NPPES registry for Christopher Tomassian is (818) 795-8252.
- Does Christopher Tomassian accept Medicare?
- Christopher Tomassian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Tomassian's NPI active?
- Yes — Christopher Tomassian's NPI (1871097550) is active in the NPPES registry as of the last update on 2022-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.