Christina Wei, M.D.
NPI 1639167257 · Internal Medicine Physician · Chelmsford, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christina Wei, M.D. is a Internal Medicine Physician provider in Chelmsford, MA (NPI 1639167257).
Provider details
- NPI number
- 1639167257
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 57666 (MA)
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
20 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
1,257 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 258 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 159 | $99 |
| Hemoglobin A1c Level83036 | 109 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 107 | $13 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 68 | $51 |
| Blood Creatinine Level82565 | 59 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 66 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 501 | 129 |
| Lisinopril | 206 | 58 |
| Losartan Potassium | 181 | 51 |
| Levothyroxine Sodium | 158 | 38 |
| Amlodipine Besylate | 148 | 41 |
| Metformin Hclbrand: Metformin Hcl Er | 137 | 33 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-07
- Last updated
- 2020-11-17
- Certified
- 2020-11-17
Frequently asked questions
- What is Christina Wei's NPI number?
- Christina Wei's National Provider Identifier (NPI) is 1639167257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christina Wei's specialty?
- Christina Wei is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christina Wei located?
- Christina Wei's practice location on file with NPPES is 228 Billerica Rd, Chelmsford, MA 01824-3604.
- What is Christina Wei's phone number?
- The practice phone number listed in the NPPES registry for Christina Wei is (978) 250-6100.
- Does Christina Wei accept Medicare?
- Christina Wei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christina Wei's NPI active?
- Yes — Christina Wei's NPI (1639167257) is active in the NPPES registry as of the last update on 2020-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.