Brian Gantwerker, M.D.
NPI 1609842715 · Neurological Surgery Physician · Santa Monica, CA
Brian Gantwerker, M.D. is a Neurological Surgery Physician provider in Santa Monica, CA (NPI 1609842715).
Provider details
- NPI number
- 1609842715
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A109316 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 26 | 14 |
| Pantoprazole Sodium | 16 | — |
| Tizanidine Hcl | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,784 across 12 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
- 2006-02-28
- Last updated
- 2016-06-14
Frequently asked questions
- What is Brian Gantwerker's NPI number?
- Brian Gantwerker's National Provider Identifier (NPI) is 1609842715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Gantwerker's specialty?
- Brian Gantwerker is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Gantwerker located?
- Brian Gantwerker's practice location on file with NPPES is 2811 Wilshire Blvd, Santa Monica, CA 90403-4803.
- What is Brian Gantwerker's phone number?
- The practice phone number listed in the NPPES registry for Brian Gantwerker is (310) 694-8300.
- Is Brian Gantwerker's NPI active?
- Yes — Brian Gantwerker's NPI (1609842715) is active in the NPPES registry as of the last update on 2016-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.