Xiaoxi Ouyang, MD
NPI 1649479064 · Internal Medicine Physician · Nashua, NH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Xiaoxi Ouyang, MD is a Internal Medicine Physician provider in Nashua, NH (NPI 1649479064).
Provider details
- NPI number
- 1649479064
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 16870 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
304 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 196 | $131 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 33 | $137 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 19 | $20 |
| Hemoglobin A1c Level83036 | 18 | $9 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 14 | $225 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 130 | 43 |
| Lisinopril | 55 | 20 |
| Levothyroxine Sodium | 54 | 17 |
| Semaglutidebrand: Ozempic | 51 | — |
| Omeprazole | 51 | 22 |
| Metformin Hcl | 50 | 21 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-07-16
- Last updated
- 2025-08-19
- Certified
- 2025-08-19
Frequently asked questions
- What is Xiaoxi Ouyang's NPI number?
- Xiaoxi Ouyang's National Provider Identifier (NPI) is 1649479064, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Xiaoxi Ouyang's specialty?
- Xiaoxi Ouyang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Xiaoxi Ouyang located?
- Xiaoxi Ouyang's practice location on file with NPPES is 154 Broad St Ste 1510, Nashua, NH 03063-3207.
- What is Xiaoxi Ouyang's phone number?
- The practice phone number listed in the NPPES registry for Xiaoxi Ouyang is (617) 272-7057.
- Does Xiaoxi Ouyang accept Medicare?
- Xiaoxi Ouyang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Xiaoxi Ouyang's NPI active?
- Yes — Xiaoxi Ouyang's NPI (1649479064) is active in the NPPES registry as of the last update on 2025-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.