DR. CRYSTAL CHIANG MD
NPI 1821657990
Emergency Medicine in Boston, MA
About Dr. Crystal Chiang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CRYSTAL CHIANG MD (NPI 1821657990) is an individual emergency medicine provider in Boston, Massachusetts, licensed in New York (315724) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Crystal Chiang Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Crystal Chiang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Port Jefferson, NY 11777
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Port Emergency Medical Services PC
- 90 clinicians in this Medicare group
Far Rockaway, NY 11691
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Island Emergency Medical Services PC
- 290 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
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 Crystal Chiang's NPI number?
The NPI number for Crystal Chiang is 1821657990. It was assigned to this individual provider in the NPPES registry on June 11, 2019.
Where is Crystal Chiang located?
Crystal Chiang practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 667-7000.
What is Crystal Chiang's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Crystal Chiang enrolled in Medicare?
Yes. Crystal Chiang is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Crystal Chiang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Crystal Chiang reassigns Medicare benefits to 2 organizations: Port Emergency Medical Services, P.C. (Port Jefferson, NY) and Island Emergency Medical Services, P.C. (Far Rockaway, NY). 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 Crystal Chiang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Crystal Chiang was last updated on April 25, 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.
# Dr. Crystal Chiang, MD · NPI 1821657990
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 11, 2019.
## Identity
- **NPI:** 1821657990 (Entity type: Individual)
- **Enumerated:** June 11, 2019
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 315724 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVE, Boston, MA 02215-5400
- **Phone:** (617) 667-7000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Port Emergency Medical Services, P.C. (NPI 1912988395, Port Jefferson, NY); Island Emergency Medical Services, P.C. (NPI 1639160385, Far Rockaway, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 25, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1821657990) · Data from the CMS NPPES public registry.