Marlena Chu, O.D.
NPI 1255597266 · Optometrist · Berkeley, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marlena Chu, O.D. is a Optometrist provider in Berkeley, CA (NPI 1255597266).
Provider details
- NPI number
- 1255597266
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 13584T (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 tenure28% of score
17 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
83 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 64 | $197 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $153 |
Typical Medicare-allowed amounts for these services range $153–$197 (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
- 2008-07-30
- Last updated
- 2011-04-22
Frequently asked questions
- What is Marlena Chu's NPI number?
- Marlena Chu's National Provider Identifier (NPI) is 1255597266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marlena Chu's specialty?
- Marlena Chu is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Marlena Chu located?
- Marlena Chu's practice location on file with NPPES is U.c. Berkeley School of Optometry, Berkeley, CA 94720-2020.
- What is Marlena Chu's phone number?
- The practice phone number listed in the NPPES registry for Marlena Chu is (510) 642-2020.
- Does Marlena Chu accept Medicare?
- Marlena Chu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marlena Chu's NPI active?
- Yes — Marlena Chu's NPI (1255597266) is active in the NPPES registry as of the last update on 2011-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.