Sian Liem, OD
NPI 1275522948 · Optometrist · Scarborough, ME
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sian Liem, OD is a Optometrist provider in Scarborough, ME (NPI 1275522948).
Provider details
- NPI number
- 1275522948
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- OPT811 (ME)
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
20 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
2,521 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) |
|---|---|---|
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 1,972 | $1 |
| Established Patient Complete Exam of Visual System92014 | 294 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 58 | $89 |
| New Patient Complete Exam of Visual System92004 | 41 | $147 |
| Exam of Visual Field With Extended Testing92083 | 34 | $63 |
| Imaging of Optic Nerve92133 | 33 | $33 |
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 |
|---|---|---|
| Latanoprost | 90 | 33 |
| Dorzolamide Hcl | 27 | — |
| Bimatoprostbrand: Lumigan | 20 | — |
| Timolol Maleate | 20 | — |
| Azithromycin | 19 | 16 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 19 | — |
| Brimonidine Tartrate | 18 | — |
| Cyclosporine | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 1 record (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
- 2005-10-17
- Last updated
- 2012-01-06
Frequently asked questions
- What is Sian Liem's NPI number?
- Sian Liem's National Provider Identifier (NPI) is 1275522948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sian Liem's specialty?
- Sian Liem is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Sian Liem located?
- Sian Liem's practice location on file with NPPES is 7 Portland Farms Rd, Scarborough, ME 04074-5301.
- What is Sian Liem's phone number?
- The practice phone number listed in the NPPES registry for Sian Liem is (207) 883-2809.
- Does Sian Liem accept Medicare?
- Sian Liem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sian Liem's NPI active?
- Yes — Sian Liem's NPI (1275522948) is active in the NPPES registry as of the last update on 2012-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.