LEONID KARKANITSA (MD) – Internal Medicine Physician, NPI 1669435087
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,447 INTERNAL MEDICINE in CT
Provider Addresses for LEONID KARKANITSA (MD)
1952 Whitney Ave
Hamden, CT 065171209
Phone: (203) 848-1083
Fax: (203) 848-1777
Type: Location
6580 Main St Fl 1
Stratford, CT 066141607
Phone: (203) 377-5444
Type: Location
6580 MAIN ST FL 1
STRATFORD, CT 066141607
Phone: (203) 377-5444
Fax: (203) 377-5540
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 38 Open Payments records for all available years, with a total value of $1,129.
Total Amount is formed as General ($1,129) + Research ($0) + Ownership ($0) = $1,129.
Last reported payment date: 2024-12-20 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($714).
Total Amount
$1,129
General + Research + Ownership
Payments
38
Total payment records
General Amount
$1,129
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $714 |
| Otsuka America Pharmaceutical, Inc. | $98 |
| Lundbeck LLC | $81 |
| Novo Nordisk Inc | $60 |
| GlaxoSmithKline, LLC. | $38 |
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: 2005-08-23
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 |
|---|---|---|---|---|
| I20050823000548 | I | Internal Medicine | CT | 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 |
|---|---|---|---|---|
| 99306 | Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 200 | 182 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 185 | 58 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 95 | 51 | $0 |
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 68 | 40 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 46 | 46 | $0 |
Insurance plans in this area (ZIP 06517)
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