Brian First, M.D.
NPI 1770531816 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian First, M.D. is a Internal Medicine Physician provider in San Diego, CA (NPI 1770531816).
Provider details
- NPI number
- 1770531816
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A33952 (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
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
3,864 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,106 | $129 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 811 | $9 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 353 | $3 |
| Automated Urinalysis Test81003 | 287 | $2 |
| Hemoglobin A1c Level83036 | 286 | $10 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 264 | $15 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 151 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 499 | 124 |
| Atorvastatin Calcium | 427 | 124 |
| Metformin Hcl | 312 | 86 |
| Amlodipine Besylate | 237 | 70 |
| Losartan Potassium | 202 | 54 |
| Montelukast Sodium | 193 | 68 |
| Semaglutide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,674 across 127 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
- 2006-05-04
- Last updated
- 2010-06-24
Frequently asked questions
- What is Brian First's NPI number?
- Brian First's National Provider Identifier (NPI) is 1770531816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian First's specialty?
- Brian First is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian First located?
- Brian First's practice location on file with NPPES is 4282 Genesee Ave, San Diego, CA 92117-4961.
- What is Brian First's phone number?
- The practice phone number listed in the NPPES registry for Brian First is (858) 292-0108.
- Does Brian First accept Medicare?
- Brian First is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian First's NPI active?
- Yes — Brian First's NPI (1770531816) is active in the NPPES registry as of the last update on 2010-06-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.