EUGENE M CHOO M.D.
NPI 1386818375
Allergy & Immunology in New York, NY
About Eugene M Choo M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EUGENE M CHOO M.D. (NPI 1386818375) is an individual allergy & immunology provider in New York, New York, licensed in New York (316212) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and maintains 5 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Eugene M Choo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Eugene Choo reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 18 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Sinai Hospital
Acute Care Hospitals · New York, NYMount Sinai Beth Israel
Acute Care Hospitals · New York, NYReferred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10029
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 Eugene Choo's NPI number?
The NPI number for Eugene Choo is 1386818375. It was assigned to this individual provider in the NPPES registry on April 22, 2008.
Where is Eugene Choo located?
Eugene Choo practices at 5 E 98th St, New York, NY 10029. The listed phone number is (212) 241-0764.
What is Eugene Choo's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Eugene Choo enrolled in Medicare?
Yes. Eugene Choo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Eugene Choo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eugene Choo reassigns Medicare benefits to 4 organizations: Icahn School Of Medicine At Mount Sinai (New York, NY), Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). 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 Eugene Choo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Eugene Choo affiliated with any hospitals?
According to CMS data, Eugene Choo is affiliated with Mount Sinai Hospital and Mount Sinai Beth Israel.
When was this NPI record last updated?
The NPPES record for Eugene Choo was last updated on August 10, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Eugene M Choo, M.D. · NPI 1386818375
Allergy & Immunology physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 22, 2008.
## Identity
- **NPI:** 1386818375 (Entity type: Individual)
- **Enumerated:** April 22, 2008
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 316212 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 5 E 98TH ST, New York, NY 10029-6501
- **Phone:** (212) 241-0764 · **Fax:** (212) 534-0971
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Icahn School Of Medicine At Mount Sinai (NPI 1639430671, New York, NY); Regents Of The University Of California (NPI 1235322348, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Baylor College Of Medicine, class of 2005
## Record status
- **NPPES last updated:** August 10, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1386818375) · Data from the CMS NPPES public registry.