DR. WILLIAM CASWELL ARNOLD (MD) – Internal Medicine Physician, NPI 1720407018
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,216 INTERNAL MEDICINE in KY
Provider Addresses for DR. WILLIAM CASWELL ARNOLD (MD)
2250 LEESTOWN RD
BLDG 17 2ND FLR RM230
LEXINGTON, KY 40511
Phone: (859) 233-4511
Fax: (859) 281-3938
Type: Location
2499 CARNEGIE LN
LEXINGTON, KY 405118449
Phone: (859) 338-9319
Fax: (859) 281-3938
Type: Mailing
186 Brenna Blvd
Salyersville, KY 414657524
Phone: (606) 349-3800
Fax: (606) 263-5619
Type: Location
476 LIBERTY RD
WEST LIBERTY, KY 414722049
Phone: (606) 743-3186
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 24 Open Payments records for all available years, with a total value of $504.
Total Amount is formed as General ($504) + Research ($0) + Ownership ($0) = $504.
Last reported payment date: 2024-11-01 • Largest payer in this snapshot: HARMONY BIOSCIENCES LLC ($256).
Total Amount
$504
General + Research + Ownership
Payments
24
Total payment records
General Amount
$504
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-01
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: 2019-08-12
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 |
|---|---|---|---|---|
| I20190812002765 | I | Internal Medicine | KY | 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 | 55 | 48 | $0 |
| 99285 | Emergency department visit with high level of medical decision making | 52 | 51 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 49 | 42 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 40 | 39 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 29 | 29 | $0 |
Insurance plans in this area (ZIP 40511)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | KY | |
| Pediatric Medicine, Emergency Medicine, Internal Medicine, Internal Medicine | KY | |
| Emergency Medicine | OH | |
| Internal Medicine, Emergency Medicine | WV | |
| Nurse Practitioner | KY | |
| Physician Assistant | LA | |
| Nurse Practitioner | KY | |
| Nurse Practitioner | KY | |
| Internal Medicine, Emergency Medicine | KY | |
| Emergency Medicine | KY |
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