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ISAAC SIEW MD
NPI 1124260732
Emergency Medicine in Rochester, NY

Active since March 27, 2009PECOS Enrolled
601 ELMWOOD AVE BOX 655, ROCHESTER, NY 14642(585) 463-2940(585) 473-3516 Get Directions Write a Review

NPPES record last updated: April 24, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Isaac Siew Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ISAAC SIEW MD (NPI 1124260732) is an individual emergency medicine provider in Rochester, New York, licensed in Texas (Q0364) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1124260732
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameISAAC SIEWCredential: MD
Location Address601 ELMWOOD AVE BOX 655Rochester, NY 14642-0001
Mailing Address601 Elmwood Ave Box 655Rochester, NY 14642-0001 · (585) 463-2940 · Fax (585) 473-3516
Phone(585) 463-2940
Fax(585) 473-3516
Sole ProprietorNo
Enumeration DateMarch 27, 2009
Last NPPES UpdateApril 24, 2024
NPPES CertifiedFebruary 12, 2024
✔ NPI 1124260732 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in TX · Q0364
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
601 ELMWOOD AVE BOX 655, Rochester, NY 14642
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Isaac Siew Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Isaac Siew reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Acs Primary Care Physicians Southwest, PA
1,241 mi
Emergency Medicine
1900 HOSPITAL BLVD
Gainesville, TX 76240
  • Reassigned Medicare billing, Texas enrollment
  • 1,193 clinicians in this Medicare group
NPI 1538101019 (925) 924-1600
Barrier Reef Emergency Physicians PLLC
1,346 mi
Emergency Medicine
301 UNIVERSITY BLVD
Galveston, TX 77555
  • Reassigned Medicare billing, Texas enrollment
  • 67 clinicians in this Medicare group
NPI 1275761512 (954) 939-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14642 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MANDEEP LEHIL
Student in an Organized Health Care Education/Training Program
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 463-2940
ANDREW DUNKMAN M.D.
Emergency Medicine
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 463-2940
DANIEL STRATZ
Emergency Medicine
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 463-2940
SUVEN COOPER
Emergency Medicine
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 463-2940
DAVID HENRY ADLER MD
Emergency Medicine
601 ELMWOOD AVE BOX 655, UNIVERSITY OF ROCHESTER MEDICAL CENTER
ROCHESTER, NY 14642
Monroe County (585) 273-3863
BAILEASUE ROUNDS DO
Student in an Organized Health Care Education/Training Program
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 275-2723
JAMES GARVEY DOOLEY DO
Student in an Organized Health Care Education/Training Program
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 756-4800
ERIK KVAMME
Student in an Organized Health Care Education/Training Program
601 ELMWOOD AVE BOX 655
ROCHESTER, NY 14642
Monroe County (585) 463-2940

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Isaac Siew's NPI number?

The NPI number for Isaac Siew is 1124260732. It was assigned to this individual provider in the NPPES registry on March 27, 2009.

Where is Isaac Siew located?

Isaac Siew practices at 601 Elmwood Ave Box 655, Rochester, NY 14642. The listed phone number is (585) 463-2940.

What is Isaac Siew's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Isaac Siew enrolled in Medicare?

Yes. Isaac Siew is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Isaac Siew's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isaac Siew reassigns Medicare benefits to 2 organizations: Acs Primary Care Physicians Southwest, PA (Gainesville, TX) and Barrier Reef Emergency Physicians PLLC (Galveston, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Isaac Siew's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Isaac Siew accept?

Health plans from Blue Cross and Blue Shield of Texas list Isaac Siew as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Isaac Siew was last updated on April 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.