KRISTAN D ZIMMERMANN (M.D.) – Diagnostic Radiology Physician, NPI 1306892286
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
804 DIAGNOSTIC RADIOLOGY in CT
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Provider Addresses for KRISTAN D ZIMMERMANN (M.D.)
6, Nawthorne Road, Old Greenwich, Greenwich, Western Connecticut Planning Region, Connecticut, 06870, United States
OLD GREENWICH, CT 068702116
Phone: (203) 637-5546
Type: Mailing
6, Shelburne Road, Stamford, Western Connecticut Planning Region, Connecticut, 06902, United States
STAMFORD, CT 069023628
Phone: (203) 359-0130
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2014-03-18
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 |
|---|---|---|---|---|
| I20140318000952 | I | Diagnostic Radiology | NY | 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 |
|---|---|---|---|---|
| 77067 | Screening mammography | 557 | 557 | $0 |
| 77063 | Screening 3d breast mammography | 556 | 556 | $0 |
| 76641 | Complete ultrasound scan of 1 breast | 183 | 181 | $0 |
| 77065 | Diagnostic mammography of 1 breast | 165 | 147 | $0 |
| G0279 | Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) | 119 | 112 | $0 |
Insurance plans in this area (ZIP 06870)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | CT | 76830 | Ultrasound pelvis through vagina | 19 | 19 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine, Sports Medicine | NC | |
| - | NY | |
| Internal Medicine | NY | |
| Certified Clinical Nurse Specialist (Cns) | NY | |
| Physician Assistant | NY | |
| Diagnostic Radiology | NY | |
| Physician Assistant | NY | |
| Emergency Medicine | NY | |
| Hospitalist, Internal Medicine | NY | |
| Diagnostic Radiology | NY |
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