Warren Gasper, M.D.
NPI 1427186212 · Surgery Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Gasper, M.D. is a Surgery Physician provider in San Francisco, CA (NPI 1427186212).
Provider details
- NPI number
- 1427186212
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A89802 (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
19 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
771 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) |
|---|---|---|
| Complete Ultrasound Study of Arm and Leg Arteries93923 | 216 | $23 |
| Ultrasound of Leg Arteries Or Artery Grafts93925 | 163 | $41 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 59 | $36 |
| Ultrasound of One Leg Arteries Or Artery Grafts93926 | 54 | $25 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 48 | $41 |
| Complete Ultrasound of Abdomen and Pelvis Artery and Vein Blood Flow93975 | 41 | $60 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,208 across 13 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
- 2007-03-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Warren Gasper's NPI number?
- Warren Gasper's National Provider Identifier (NPI) is 1427186212, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Gasper's specialty?
- Warren Gasper is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Gasper located?
- Warren Gasper's practice location on file with NPPES is 513 Parnassus Ave # S-321, San Francisco, CA 94143-2205.
- What is Warren Gasper's phone number?
- The practice phone number listed in the NPPES registry for Warren Gasper is (415) 476-1239.
- Does Warren Gasper accept Medicare?
- Warren Gasper is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Gasper's NPI active?
- Yes — Warren Gasper's NPI (1427186212) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.