GARY ALTWERGER (M.D.) – Gynecologic Oncology Physician, NPI 1407114630
Gynecologic Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
37 GYNECOLOGICAL ONCOLOGY in CT
Provider Addresses for GARY ALTWERGER (M.D.)
333 CEDAR STREET
FMB 328
NEW HAVEN, CT 065103220
Phone: (203) 785-7385
Fax: (203) 737-4377
Type: Mailing
150 HARVESTER DR STE 300
BURR RIDGE, IL 605275965
Phone:
Type: Mailing
5841 S MARYLAND AVE
CHICAGO, IL 606371443
Phone: (888) 824-0200
Type: Location
880 W. Central Rd.
Suite 5000
Arlington Heights, IL 600052355
Phone: (847) 618-3800
Fax: (847) 618-3809
Type: Location
333 cedar street
FMB 328
New Haven, CT 065103220
Phone: (203) 785-7385
Fax: (203) 785-7134
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 $3,130.
Total Amount is formed as General ($3,130) + Research ($0) + Ownership ($0) = $3,130.
Last reported payment date: 2024-11-12 • Largest payer in this snapshot: Intuitive Surgical, Inc. ($2,692).
Total Amount
$3,130
General + Research + Ownership
Payments
24
Total payment records
General Amount
$3,130
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Intuitive Surgical, Inc. | $2,692 |
| Foundation Medicine, Inc. | $175 |
| ABBVIE INC. | $136 |
| ImmunoGen, Inc. | $128 |
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: 2025-11-05
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 |
|---|---|---|---|---|
| I20160805001059 | I | Obstetrics/Gynecology | CT | TBD |
| I20251105003308 | I | Gynecological Oncology | IL | 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 | 37 | 29 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 36 | 28 | $0 |
| 99441 | Telephone medical discussion with physician, 5-10 minutes | 25 | 16 | $0 |
Insurance plans in this area (ZIP 06510)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Interventional Cardiology, Cardiovascular Disease (Cardiology) | CT | |
| H E M A T O L O G Y/ O N C O L O G Y | CT | |
| Internal Medicine, Nephrology | SC | |
| - | CT | |
| - | NC | |
| Internal Medicine | CT | |
| - | CT | |
| Cardiac Surgery | CT | |
| - | CT | |
| - | CT |
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