DR. JOHN JOSEPH HENNESSEY (M.D.) – Internal Medicine Physician, NPI 1215916564
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,448 INTERNAL MEDICINE in CT
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Provider Addresses for DR. JOHN JOSEPH HENNESSEY (M.D.)
Route 12, Allyn Point, Gales Ferry, Ledyard, New London County, Connecticut, 06335, United States
SUITE 1
GALES FERRY, CT 063351800
Phone: (860) 464-7253
Fax: (860) 464-7404
Type: Location
PO BOX 355
GALES FERRY, CT 063350355
Phone: (860) 464-7253
Fax: (860) 464-7404
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 128 Open Payments records for all available years, with a total value of $2,873.
Total Amount is formed as General ($2,873) + Research ($0) + Ownership ($0) = $2,873.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($774).
Total Amount
$2,873
General + Research + Ownership
Payments
128
Total payment records
General Amount
$2,873
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
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: 2010-09-02
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 |
|---|---|---|---|---|
| I20100902000771 | 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 |
|---|---|---|---|---|
| J0897 | Injection, denosumab, 1 mg | 3,062 | 34 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,328 | 573 | $0 |
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 437 | 95 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 435 | 384 | $0 |
| 81002 | Urinalysis, manual test | 403 | 357 | $0 |
Insurance plans in this area (ZIP 06335)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | CT | 81002 | Urinalysis, manual test | 332 | 296 |
| INTERNAL MEDICINE | CT | 83036 | Hemoglobin A1C level | 232 | 110 |
| INTERNAL MEDICINE | CT | 90670 | Pneumococcal vaccine for injection into muscle | 74 | 74 |
| INTERNAL MEDICINE | CT | 94060 | Measurement and graphic recording of the amount and speed of breathed air, before and following medication administration | 13 | 13 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physical Therapist In Private Practice | CT | |
| Physical Therapist In Private Practice | CT | |
| Family Practice | CT | |
| Physical Therapist In Private Practice | CT | |
| Occupational Therapist In Private Practice | NY | |
| Internal Medicine | CT | |
| Physical Therapist In Private Practice | CT | |
| Nurse Practitioner | CT | |
| Physical Therapist In Private Practice | CT | |
| Physical Therapist In Private Practice | MA |
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