CARLOS F CHANG (M.D.) – Internal Medicine Physician, NPI 1922005016
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
12,368 INTERNAL MEDICINE in FL
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Provider Addresses for CARLOS F CHANG (M.D.)
PO BOX 1363
MOUNT DORA, FL 327561363
Phone: (352) 343-0053
Fax: (352) 343-0059
Type: Mailing
Mayo Drive, Tavares, Lake County, Florida, 32278, United States
TAVARES, FL 32778
Phone: (352) 343-0053
Fax: (352) 343-0059
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $59.
Total Amount is formed as General ($59) + Research ($0) + Ownership ($0) = $59.
Last reported payment date: 2023-09-13 • Largest payer in this snapshot: Abbott Laboratories ($39).
Total Amount
$59
General + Research + Ownership
Payments
3
Total payment records
General Amount
$59
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-09-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $39 |
| PFIZER INC. | $20 |
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: 2004-10-27
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 |
|---|---|---|---|---|
| I20041027000640 | I | Internal Medicine | FL | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 1,000 | 309 | $0 |
| 99308 | Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 885 | 215 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 854 | 337 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 606 | 347 | $0 |
| 99497 | Advance care planning, first 30 minutes | 271 | 271 | $0 |
Insurance plans in this area (ZIP 32756)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | FL | 85610 | Blood test, clotting time | 298 | 32 |
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