William Spalding, M.D.
NPI 1558652305 · Pain Medicine (Anesthesiology) Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Spalding, M.D. is a Pain Medicine (Anesthesiology) Physician provider in Los Angeles, CA (NPI 1558652305).
Provider details
- NPI number
- 1558652305
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A125450 (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
15 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
339 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 | 147 | $127 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 56 | $181 |
| Daily Hospital Management of Continuous Spinal Drug Administration01996 | 41 | $64 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 29 | $234 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 22 | $51 |
| Telephone Medical Discussion With Physician, 11-20 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 123 | 45 |
| Pregabalin | 89 | 22 |
| Amitriptyline Hcl | 57 | 14 |
| Methocarbamol | 32 | — |
| Nortriptyline Hcl | 21 | — |
| Tizanidine Hcl | 19 | — |
| Baclofen | 16 | — |
| Duloxetine Hcl | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$541 across 11 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
- 2011-04-27
- Last updated
- 2023-11-27
- Certified
- 2020-10-12
Frequently asked questions
- What is William Spalding's NPI number?
- William Spalding's National Provider Identifier (NPI) is 1558652305, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Spalding's specialty?
- William Spalding is listed in the NPPES registry with a primary specialty of Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is William Spalding located?
- William Spalding's practice location on file with NPPES is 1500 San Pablo St, Los Angeles, CA 90033-5313.
- What is William Spalding's phone number?
- The practice phone number listed in the NPPES registry for William Spalding is (323) 442-7400.
- Does William Spalding accept Medicare?
- William Spalding is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Spalding's NPI active?
- Yes — William Spalding's NPI (1558652305) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.