David Liou, O.D.
NPI 1811275522 · Optometrist · Oakland, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Liou, O.D. is a Optometrist provider in Oakland, CA (NPI 1811275522).
Provider details
- NPI number
- 1811275522
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 14220 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 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
44 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) |
|---|---|---|
| Imaging of Retina92134 | 25 | $48 |
| Established Patient Complete Exam of Visual System92014 | 19 | $108 |
Typical Medicare-allowed amounts for these services range $48–$108 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$30 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
- 2011-07-29
- Last updated
- 2013-04-15
Frequently asked questions
- What is David Liou's NPI number?
- David Liou's National Provider Identifier (NPI) is 1811275522, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Liou's specialty?
- David Liou is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is David Liou located?
- David Liou's practice location on file with NPPES is 388 9th St, Oakland, CA 94607-4287.
- What is David Liou's phone number?
- The practice phone number listed in the NPPES registry for David Liou is (510) 268-9600.
- Does David Liou accept Medicare?
- David Liou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Liou's NPI active?
- Yes — David Liou's NPI (1811275522) is active in the NPPES registry as of the last update on 2013-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.