Thomas Xu, M.D.
NPI 1972881050 · Internal Medicine Physician · Wilton, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Xu, M.D. is a Internal Medicine Physician provider in Wilton, CT (NPI 1972881050).
Provider details
- NPI number
- 1972881050
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 053419 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 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
588 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 | 236 | $134 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 200 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 77 | $95 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 50 | $188 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 25 | $15 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 203 | 53 |
| Lisinopril | 92 | 27 |
| Amlodipine Besylate | 82 | 23 |
| Levothyroxine Sodium | 71 | 16 |
| Rosuvastatin Calcium | 70 | 23 |
| Losartan Potassium | 60 | 20 |
| Tamsulosin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-24
- Last updated
- 2021-02-22
- Certified
- 2021-02-22
Frequently asked questions
- What is Thomas Xu's NPI number?
- Thomas Xu's National Provider Identifier (NPI) is 1972881050, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Xu's specialty?
- Thomas Xu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Xu located?
- Thomas Xu's practice location on file with NPPES is 372 Danbury Rd Ste 197, Wilton, CT 06897-2523.
- What is Thomas Xu's phone number?
- The practice phone number listed in the NPPES registry for Thomas Xu is (203) 276-3366.
- Does Thomas Xu accept Medicare?
- Thomas Xu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Xu's NPI active?
- Yes — Thomas Xu's NPI (1972881050) is active in the NPPES registry as of the last update on 2021-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.