DR. CHRISTINA L WEI (M.D.) – Internal Medicine Physician, NPI 1639167257
Internal Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
7,722 INTERNAL MEDICINE in MA
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Provider Addresses for DR. CHRISTINA L WEI (M.D.)
Harvard Vanguard Medical Associates, Chelmsford, 228, Billerica Road, Chelmsford, Middlesex County, Massachusetts, 01824, United States
CHELMSFORD, MA 018243604
Phone: (978) 250-6100
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-05-04
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050504000031 | I | Internal Medicine | MA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 36415 | Insertion of needle into vein for collection of blood sample | 312 | 143 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 151 | 102 | $0 |
| 80061 | Blood test, lipids (cholesterol and triglycerides) | 117 | 105 | $0 |
| 83036 | Hemoglobin a1c level | 114 | 87 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 87 | 87 | $0 |
Insurance plans in this area (ZIP 01824)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MA | |
| Family Practice | MA | |
| D E R M A T O L O G Y | MA | |
| Emergency Medicine | MA | |
| Internal Medicine, Cardiovascular Disease (Cardiology) | MA | |
| - | MA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MA | |
| - | MA | |
| Internal Medicine | MA | |
| O T O L A R Y N G O L O G Y | MA |
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