Ellen Liao, PA-C
NPI 1417129156 · Physician Assistant · San Francisco, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Liao, PA-C is a Physician Assistant provider in San Francisco, CA (NPI 1417129156).
Provider details
- NPI number
- 1417129156
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA19453 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 82 | 78 |
| Ondansetronbrand: Ondansetron Odt | 74 | 72 |
| Meloxicam | 64 | 64 |
| Pantoprazole Sodium | 57 | 57 |
| Dabigatran Etexilate Mesylatebrand: Pradaxa | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude 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 no Part D record, 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
Additional practice locations (1)
- 10710 N Torrey Pines RdLa Jolla, CA 92037-1035Phone: (858) 554-7988
Registry dates
- Enumerated
- 2008-04-01
- Last updated
- 2022-05-31
- Certified
- 2022-05-31
Frequently asked questions
- What is Ellen Liao's NPI number?
- Ellen Liao's National Provider Identifier (NPI) is 1417129156, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Liao's specialty?
- Ellen Liao is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ellen Liao located?
- Ellen Liao's practice location on file with NPPES is 450 6th Ave Fl 5, San Francisco, CA 94118-3010.
- What is Ellen Liao's phone number?
- The practice phone number listed in the NPPES registry for Ellen Liao is (415) 833-2291.
- Does Ellen Liao accept Medicare?
- Ellen Liao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Liao's NPI active?
- Yes — Ellen Liao's NPI (1417129156) is active in the NPPES registry as of the last update on 2022-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.