Justin Grubbs
NPI 1023495975 · Anesthesiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Grubbs is a Anesthesiology Physician provider in San Francisco, CA (NPI 1023495975).
Provider details
- NPI number
- 1023495975
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 167111 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
72 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Anesthesia for Lens Surgery00142 | 45 | $146 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 14 | $15 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 13 | $47 |
Typical Medicare-allowed amounts for these services range $15–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-29
- Last updated
- 2023-10-26
- Certified
- 2023-10-26
Frequently asked questions
- What is Justin Grubbs's NPI number?
- Justin Grubbs's National Provider Identifier (NPI) is 1023495975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Grubbs's specialty?
- Justin Grubbs is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Grubbs located?
- Justin Grubbs's practice location on file with NPPES is 239 Mount Vernon Ave, San Francisco, CA 94112-3631.
- What is Justin Grubbs's phone number?
- The practice phone number listed in the NPPES registry for Justin Grubbs is (808) 429-6979.
- Does Justin Grubbs accept Medicare?
- Justin Grubbs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Grubbs's NPI active?
- Yes — Justin Grubbs's NPI (1023495975) is active in the NPPES registry as of the last update on 2023-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.