Ronald Simon, M.D.
NPI 1255304622 · Allergy & Immunology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Simon, M.D. is a Allergy & Immunology Physician provider in San Diego, CA (NPI 1255304622).
Provider details
- NPI number
- 1255304622
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G31303 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
641 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 245 | $4 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 165 | $16 |
| Professional Service for Multiple Injections of Allergen95117 | 63 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 55 | $137 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 34 | $192 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 28 |
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 |
|---|---|---|
| Azithromycin | 57 | 55 |
| Prednisone | 33 | 16 |
| Atovaquone/Proguanil Hclbrand: Atovaquone-Proguanil Hcl | 33 | 33 |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 26 | — |
| Fluticasone Propionate | 25 | — |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 23 | — |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$669 across 24 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
- 2006-02-08
- Last updated
- 2018-07-05
Frequently asked questions
- What is Ronald Simon's NPI number?
- Ronald Simon's National Provider Identifier (NPI) is 1255304622, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Simon's specialty?
- Ronald Simon is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Simon located?
- Ronald Simon's practice location on file with NPPES is 3811 Valley Centre Dr, San Diego, CA 92130.
- What is Ronald Simon's phone number?
- The practice phone number listed in the NPPES registry for Ronald Simon is (858) 764-9010.
- Does Ronald Simon accept Medicare?
- Ronald Simon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Simon's NPI active?
- Yes — Ronald Simon's NPI (1255304622) is active in the NPPES registry as of the last update on 2018-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.