Stephen Quach, M.D
NPI 1558724427 · Anesthesiology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Quach, M.D is a Anesthesiology Physician provider in Los Angeles, CA (NPI 1558724427).
Provider details
- NPI number
- 1558724427
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
26 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 Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 15 | $140 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 11 | $136 |
Typical Medicare-allowed amounts for these services range $136–$140 (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
- 2016-03-30
- Last updated
- 2020-04-21
- Certified
- 2020-04-21
Frequently asked questions
- What is Stephen Quach's NPI number?
- Stephen Quach's National Provider Identifier (NPI) is 1558724427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Quach's specialty?
- Stephen Quach is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Quach located?
- Stephen Quach's practice location on file with NPPES is 2051 Marengo St, Los Angeles, CA 90033-1352.
- What is Stephen Quach's phone number?
- The practice phone number listed in the NPPES registry for Stephen Quach is (323) 409-1000.
- Does Stephen Quach accept Medicare?
- Stephen Quach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Quach's NPI active?
- Yes — Stephen Quach's NPI (1558724427) is active in the NPPES registry as of the last update on 2020-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.