Christina Siau
NPI 1245601574 · Physician Assistant · Ithaca, NY
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christina Siau is a Physician Assistant provider in Ithaca, NY (NPI 1245601574).
Provider details
- NPI number
- 1245601574
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 019037 (NY)
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 tenure28% of score
10 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
131 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 52 | $174 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 41 | $97 |
| Critical Care, Each Additional 30 Minutes99292 | 26 | $88 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 12 | $141 |
Typical Medicare-allowed amounts for these services range $88–$174 (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
- 2015-10-13
- Last updated
- 2022-09-24
- Certified
- 2022-09-24
Frequently asked questions
- What is Christina Siau's NPI number?
- Christina Siau's National Provider Identifier (NPI) is 1245601574, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christina Siau's specialty?
- Christina Siau is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Christina Siau located?
- Christina Siau's practice location on file with NPPES is 101 Dates Dr, Ithaca, NY 14850-1342.
- What is Christina Siau's phone number?
- The practice phone number listed in the NPPES registry for Christina Siau is (607) 274-4011.
- Does Christina Siau accept Medicare?
- Christina Siau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christina Siau's NPI active?
- Yes — Christina Siau's NPI (1245601574) is active in the NPPES registry as of the last update on 2022-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.