DR. KALYANAM VI SUBRAMANYAM (M.D.) – Gastroenterology Physician, NPI 1164493870
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,498 GASTROENTEROLOGY in TX
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Provider Addresses for DR. KALYANAM VI SUBRAMANYAM (M.D.)
Medical Center Boulevard, Webster, Harris County, Texas, 77598, United States
WEBSTER, TX 775984055
Phone: (281) 557-2527
Fax: (281) 557-7203
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)
CMS reports 116 Open Payments records for all available years, with a total value of $2,615.
Total Amount is formed as General ($2,615) + Research ($0) + Ownership ($0) = $2,615.
Last reported payment date: 2024-12-31 • Largest payer in this snapshot: ABBVIE INC. ($553).
Total Amount
$2,615
General + Research + Ownership
Payments
116
Total payment records
General Amount
$2,615
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-31
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2007-04-20
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 |
|---|---|---|---|---|
| I20070420000483 | I | Gastroenterology | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 403 | 240 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 140 | 121 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 53 | 53 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 32 | 32 | $0 |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | 27 | 27 | $0 |
Insurance plans in this area (ZIP 77598)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | TX | 43235 | Diagnostic examination of esophagus, stomach, and/or upper small bowel using an endoscope | 27 | 25 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | AZ | |
| G A S T R O E N T E R O L O G Y | TX | |
| Gastroenterology, Internal Medicine | MA | |
| Nurse Practitioner | TX |
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