DR. XIAOXI OUYANG MD
NPI 1649479064
Internal Medicine in Nashua, NH
About Dr. Xiaoxi Ouyang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. XIAOXI OUYANG MD (NPI 1649479064) is an individual internal medicine provider in Nashua, New Hampshire, licensed in New Hampshire (16870) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, is affiliated with Parkland Medical Center, and is a graduate of Mcgill University Faculty Of Dentistry (2007).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Dr. Xiaoxi Ouyang Md 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 Xiaoxi Ouyang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Nashua, NH 03063
- Reassigned Medicare billing, New Hampshire enrollment
Watertown, MA 02472
- Reassigned Medicare billing, New Hampshire enrollment
- 25 clinicians in this Medicare group
Keene, NH 03431
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
New London, NH 03257
- Reassigned Medicare billing, New Hampshire enrollment
- 219 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 8
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Parkland Medical Center
Acute Care Hospitals · Derry, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03063 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
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 Xiaoxi Ouyang's NPI number?
The NPI number for Xiaoxi Ouyang is 1649479064. It was assigned to this individual provider in the NPPES registry on July 16, 2007.
Where is Xiaoxi Ouyang located?
Xiaoxi Ouyang practices at 154 Broad St Ste 1510, Nashua, NH 03063. The listed phone number is (617) 272-7057.
What is Xiaoxi Ouyang's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Xiaoxi Ouyang enrolled in Medicare?
Yes. Xiaoxi Ouyang 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 Xiaoxi Ouyang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Xiaoxi Ouyang reassigns Medicare benefits to 4 organizations: Serenity Medical Weight Loss Clinic LLC (Nashua, NH), Steward Medical Group, Inc (Watertown, MA), Dartmouth-Hitchcock Clinic (Keene, NH) and The New London Hospital Association, Inc. (New London, NH). 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 Xiaoxi Ouyang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Xiaoxi Ouyang accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and WellSense Health Plan list Xiaoxi Ouyang 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.
Is Xiaoxi Ouyang affiliated with any hospitals?
According to CMS data, Xiaoxi Ouyang is affiliated with Parkland Medical Center.
When was this NPI record last updated?
The NPPES record for Xiaoxi Ouyang was last updated on August 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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. Xiaoxi Ouyang, MD · NPI 1649479064
Internal Medicine physician in Nashua, New Hampshire. Individual provider, active in the CMS NPPES registry since July 16, 2007.
## Identity
- **NPI:** 1649479064 (Entity type: Individual)
- **Enumerated:** July 16, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 16870 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 154 BROAD ST STE 1510, Nashua, NH 03063-3207
- **Phone:** (617) 272-7057 · **Fax:** (949) 864-3519
## 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): Serenity Medical Weight Loss Clinic LLC (NPI 1003608225, Nashua, NH); Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Dartmouth-Hitchcock Clinic (NPI 1174176861, Keene, NH); The New London Hospital Association, Inc. (NPI 1831200583, New London, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Mcgill University Faculty Of Dentistry, class of 2007
## Record status
- **NPPES last updated:** August 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1649479064) · Data from the CMS NPPES public registry.