John Siu, M.D.
NPI 1922323492 · Anesthesiology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Siu, M.D. is a Anesthesiology Physician provider in Walnut Creek, CA (NPI 1922323492).
Provider details
- NPI number
- 1922323492
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD451510 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 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
424 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) |
|---|---|---|
| Injection of Substance Into Lower Spine Canal62322 | 134 | $87 |
| Injection of Anesthetic Agent And/Or Steroid Into Thigh Nerve (femoral Nerve)64447 | 103 | $38 |
| Anesthesia for Procedure for Total Knee Joint Replacement01402 | 94 | $327 |
| Anesthesia for Total Hip Replacement01214 | 40 | $364 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 21 | $158 |
| Injection of Anesthetic Agent And/Or Steroid Into Arm Nerve Bundle (brachial Plexus)64415 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48 across 2 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
- 2010-03-29
- Last updated
- 2019-12-09
- Certified
- 2019-12-09
Frequently asked questions
- What is John Siu's NPI number?
- John Siu's National Provider Identifier (NPI) is 1922323492, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Siu's specialty?
- John Siu is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Siu located?
- John Siu's practice location on file with NPPES is 2175 N California Blvd Ste 425, Walnut Creek, CA 94596-7164.
- What is John Siu's phone number?
- The practice phone number listed in the NPPES registry for John Siu is (925) 543-0140.
- Does John Siu accept Medicare?
- John Siu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Siu's NPI active?
- Yes — John Siu's NPI (1922323492) is active in the NPPES registry as of the last update on 2019-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.