William Maxwell, M.D.
NPI 1619948031 · Anesthesiology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Maxwell, M.D. is a Anesthesiology Physician provider in San Diego, CA (NPI 1619948031).
Provider details
- NPI number
- 1619948031
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G78744 (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
20 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
81 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 | 23 | $136 |
| Anesthesia for Other Closed Procedure on Chest00520 | 19 | $219 |
| Anesthesia for Other Procedure on Upper Abdomen00790 | 14 | $347 |
| Injection of Anesthetic Agent And/Or Steroid Into Arm Nerve Bundle (brachial Plexus)64415 | 13 | $70 |
| Injection of Anesthetic Agent And/Or Steroid Into Thigh Nerve (femoral Nerve)64447 | 12 | $50 |
Typical Medicare-allowed amounts for these services range $50–$347 (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
- 2006-02-01
- Last updated
- 2011-08-10
Frequently asked questions
- What is William Maxwell's NPI number?
- William Maxwell's National Provider Identifier (NPI) is 1619948031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Maxwell's specialty?
- William Maxwell is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Maxwell located?
- William Maxwell's practice location on file with NPPES is 3626 Ruffin Rd, San Diego, CA 92123-1810.
- What is William Maxwell's phone number?
- The practice phone number listed in the NPPES registry for William Maxwell is (858) 565-9666.
- Does William Maxwell accept Medicare?
- William Maxwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Maxwell's NPI active?
- Yes — William Maxwell's NPI (1619948031) is active in the NPPES registry as of the last update on 2011-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.