Evan Siau, M.D.
NPI 1205217973 · Hospitalist Physician · New York, NY
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Evan Siau, M.D. is a Hospitalist Physician provider in New York, NY (NPI 1205217973).
Provider details
- NPI number
- 1205217973
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 299726 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
816 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 326 | $86 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 311 | $129 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 55 | $89 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 46 | $125 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 45 | $143 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 33 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$28 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (4)
- 4422 3rd Ave Bldg 3Department of Internal MedicineBronx, NY 10457-2545Phone: (718) 960-9000
- 350 E 17th StNew York, NY 10003-3805Phone: (212) 420-4056
- 281 1st AveNew York, NY 10003-2925Phone: (212) 844-1808
- 10 Union Sq ENew York, NY 10003-3314Phone: (212) 844-1808
Registry dates
- Enumerated
- 2015-06-17
- Last updated
- 2023-08-04
- Certified
- 2023-08-03
Frequently asked questions
- What is Evan Siau's NPI number?
- Evan Siau's National Provider Identifier (NPI) is 1205217973, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Evan Siau's specialty?
- Evan Siau is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Evan Siau located?
- Evan Siau's practice location on file with NPPES is 1st Avenue at 16th Street, New York, NY 10003.
- What is Evan Siau's phone number?
- The practice phone number listed in the NPPES registry for Evan Siau is (212) 844-1808.
- Does Evan Siau accept Medicare?
- Evan Siau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Evan Siau's NPI active?
- Yes — Evan Siau's NPI (1205217973) is active in the NPPES registry as of the last update on 2023-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.