Marisa Liu, M.D.
NPI 1649624800 · Obstetrics & Gynecology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marisa Liu, M.D. is a Obstetrics & Gynecology Physician provider in Orange, CA (NPI 1649624800).
Provider details
- NPI number
- 1649624800
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
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 tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dexamethasone | 68 | 23 |
| Olanzapine | 62 | 19 |
| Omeprazole | 38 | 13 |
| Prochlorperazine Maleate | 31 | 18 |
| Ondansetron Hcl | 24 | 15 |
| Lorazepam | 19 | 14 |
| Olaparibbrand: Lynparza | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-14
- Last updated
- 2025-05-27
- Certified
- 2023-03-07
Frequently asked questions
- What is Marisa Liu's NPI number?
- Marisa Liu's National Provider Identifier (NPI) is 1649624800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marisa Liu's specialty?
- Marisa Liu is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Marisa Liu located?
- Marisa Liu's practice location on file with NPPES is 101 the City Dr S Ste 800, Orange, CA 92868-3201.
- What is Marisa Liu's phone number?
- The practice phone number listed in the NPPES registry for Marisa Liu is (714) 456-5616.
- Does Marisa Liu accept Medicare?
- Marisa Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marisa Liu's NPI active?
- Yes — Marisa Liu's NPI (1649624800) is active in the NPPES registry as of the last update on 2025-05-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.