PEGGY CHIEN DO
NPI 1861416489
Pediatrics in Holyoke, MA
About Peggy Chien Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PEGGY CHIEN DO (NPI 1861416489) is an individual pediatrics provider in Holyoke, Massachusetts, licensed in Massachusetts (233965) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Peggy Chien Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Peggy Chien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Holyoke, MA 01040
- Reassigned Medicare billing, Massachusetts enrollment
- 14 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01040 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.
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 Peggy Chien's NPI number?
The NPI number for Peggy Chien is 1861416489. It was assigned to this individual provider in the NPPES registry on July 27, 2006.
Where is Peggy Chien located?
Peggy Chien practices at 150 Lower Westfield Rd Ste 1, Holyoke, MA 01040. The listed phone number is (413) 536-2393.
What is Peggy Chien's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Peggy Chien enrolled in Medicare?
Yes. Peggy Chien is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Peggy Chien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peggy Chien reassigns Medicare benefits to Holyoke Pediatric Associates, LLP (Holyoke, MA). The 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 Peggy Chien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Peggy Chien accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Peggy Chien 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 Peggy Chien was last updated on September 1, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Peggy Chien, DO · NPI 1861416489
Pediatrics physician in Holyoke, Massachusetts. Individual provider, active in the CMS NPPES registry since July 27, 2006.
## Identity
- **NPI:** 1861416489 (Entity type: Individual)
- **Enumerated:** July 27, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 233965 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 150 LOWER WESTFIELD RD, STE 1, Holyoke, MA 01040-2676
- **Phone:** (413) 536-2393 · **Fax:** (413) 536-1087
## 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:** Holyoke Pediatric Associates, LLP (NPI 1568439818, Holyoke, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 1, 2015
- **Other identifiers:** Medicare UPIN I04550 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1861416489) · Data from the CMS NPPES public registry.