Har Hiu Lam, M.D.
NPI 1124190459 · Specialist · Union City, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Har Hiu Lam, M.D. is a Specialist provider in Union City, CA (NPI 1124190459).
Provider details
- NPI number
- 1124190459
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A86193 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
44 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 44 | $110 |
Typical Medicare-allowed amounts for these services range $110–$110 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 133 | 55 |
| Diclofenac Sodium | 127 | 30 |
| Prednisolone Acetate | 114 | 67 |
| Latanoprost | 106 | 46 |
| Moxifloxacin Hclbrand: Moxifloxacin | 61 | 50 |
| Bromfenac Sodium | 59 | — |
| Dorzolamide Hcl | 54 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2021-12-22
Frequently asked questions
- What is Har Hiu Lam's NPI number?
- Har Hiu Lam's National Provider Identifier (NPI) is 1124190459, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Har Hiu Lam's specialty?
- Har Hiu Lam is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Har Hiu Lam located?
- Har Hiu Lam's practice location on file with NPPES is 3553 Whipple Rd, Union City, CA 94587-1507.
- What is Har Hiu Lam's phone number?
- The practice phone number listed in the NPPES registry for Har Hiu Lam is (510) 454-1000.
- Does Har Hiu Lam accept Medicare?
- Har Hiu Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Har Hiu Lam's NPI active?
- Yes — Har Hiu Lam's NPI (1124190459) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.