DR. EWAN DOUGLAS JOHNSON (MD, PHD) – Internal Medicine Physician, NPI 1043521313
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 DR. EWAN DOUGLAS JOHNSON (MD, PHD)
9359 Hwy 37 Suite D
Corpus Christi, TX 784097840
Phone: (800) 951-0182
Fax: (832) 565-1921
Type: Location
13414 MEDICAL COMPLEX DR STE 6
TOMBALL, TX 773753333
Phone: (281) 516-0212
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $17.
Total Amount is formed as General ($17) + Research ($0) + Ownership ($0) = $17.
Last reported payment date: 2023-03-08 • Largest payer in this snapshot: Astellas Pharma US Inc ($17).
Total Amount
$17
General + Research + Ownership
Payments
1
Total payment records
General Amount
$17
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-03-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Astellas Pharma US Inc | $17 |
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: 2024-02-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20100920000379 | I | Internal Medicine | TX | TBD |
| I20240214004252 | I | Internal Medicine | AZ | 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 |
|---|---|---|---|---|
| 99284 | Emergency department visit with moderate level of medical decision making | 12 | 12 | $0 |
Insurance plans in this area (ZIP 78409)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine, General Practice | AZ | |
| Emergency Medicine | NJ | |
| Emergency Medicine | AZ | |
| Emergency Medicine | IL | |
| Emergency Medicine | PA | |
| Family Practice | MO | |
| Hospitalist, Internal Medicine | TX | |
| Physician Assistant | DONGDUCHEON | |
| Emergency Medicine | AL | |
| Hospitalist, Internal Medicine | AZ |
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