WAN HSIANG CHEN (MD) – Internal Medicine Physician, NPI 1316527559
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
13,290 INTERNAL MEDICINE in TX
Provider Addresses for WAN HSIANG CHEN (MD)
4101 GREENBRIAR DR STE 122G
HOUSTON, TX 770985266
Phone: (713) 235-1100
Fax: (713) 575-3912
Type: Mailing
6550 FANNIN ST # SM1001
HOUSTON, TX 770302717
Phone: (713) 441-5114
Fax: (713) 790-3023
Type: Mailing
6565 FANNIN ST
HOUSTON, TX 770302703
Phone: (713) 235-1100
Fax: (713) 575-3912
Type: Location
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: 2024-09-10
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 |
|---|---|---|---|---|
| I20240910003100 | I | Internal Medicine | TX | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 77098)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Hospitalist | WI | |
| Hospitalist, Internal Medicine | NY | |
| Internal Medicine | TX | |
| Internal Medicine, Cardiovascular Disease (Cardiology) | AL | |
| Hospitalist, Internal Medicine | TX | |
| Internal Medicine | TX | |
| Internal Medicine, Pediatric Medicine | TX | |
| Internal Medicine | TX | |
| Hospitalist, Internal Medicine | TX | |
| Internal Medicine | TX |
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