DR. ERWEI MARK GAO (MD) – Anesthesiology Physician, NPI 1245276245
Anesthesiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
556 ANESTHESIOLOGY in IA
Provider Addresses for DR. ERWEI MARK GAO (MD)
2710 Saint Francis Dr
Suite 410
Waterloo, IA 507025619
Phone: (319) 272-5000
Fax: (319) 272-5264
Type: Location
200 HAWKINS DR
IOWA CITY, IA 522421009
Phone: (319) 356-2633
Fax: (319) 356-2940
Type: Mailing
2101, Kimball Avenue, Waterloo, Black Hawk County, Iowa, 50702, United States
LL14
WATERLOO, IA 507025063
Phone: (319) 272-1590
Fax: (319) 272-1535
Type: Mailing
2710, Saint Francis Drive, Waterloo, Black Hawk County, Iowa, 50702, United States
SUITE 410
WATERLOO, IA 507025619
Phone: (319) 272-5000
Fax: (319) 272-5264
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: 2005-03-29
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 |
|---|---|---|---|---|
| I20050329000611 | I | Anesthesiology | IA | 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 50702)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IA | |
| Gastroenterology, Internal Medicine | IA | |
| Nurse Practitioner | IA | |
| - | IA | |
| Nurse Practitioner | IA | |
| Physician Assistant | IA | |
| - | IN | |
| Orthopedic Surgery | IA | |
| Family Practice | IA | |
| Family Practice | IA |
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