DR. MATHAVI SAHADEVAN (MD) – Internal Medicine Physician, NPI 1871022095
Internal Medicine Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
4,186 INTERNAL MEDICINE in MO
Provider Addresses for DR. MATHAVI SAHADEVAN (MD)
1035 Bellevue Ave Ste 400
Saint Louis, MO 631171844
Phone: (314) 925-4700
Type: Location
9701 Landmark Parkway Dr Ste 207
Saint Louis, MO 631271665
Phone: (314) 849-8700
Type: Location
1 Good Samaritan Way
Mount Vernon, IL 628642402
Phone: (618) 242-4600
Type: Location
16216 BAXTER RD STE 299
CHESTERFIELD, MO 630174778
Phone: (636) 536-2600
Type: Location
1 GOOD SAMARITAN WAY
MOUNT VERNON, IL 628642402
Phone: (618) 242-4600
Type: Location
Dana Court, Naperville, DuPage County, Illinois, 60563, United States
NAPERVILLE, IL 605632466
Phone: (630) 414-7792
Type: Mailing
PO BOX 874797
KANSAS CITY, MO 641874797
Phone: (314) 849-8700
Type: Mailing
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: 2025-09-10
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 |
|---|---|---|---|---|
| I20250910003919 | I | Internal Medicine | MO | 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 63117)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| A L L E R G Y/ I M M U N O L O G Y | MO | |
| Internal Medicine, Allergy/Immunology | MO | |
| Nurse Practitioner | MO | |
| A L L E R G Y/ I M M U N O L O G Y | MO | |
| Physician Assistant | CA | |
| Pediatric Medicine, Allergy/Immunology, Internal Medicine | MO | |
| Allergy/Immunology, Pediatric Medicine | MO | |
| Allergy/Immunology, Internal Medicine | MO | |
| - | MO | |
| Physician Assistant | MO |
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