DR. CERRAH LYNN MENDELSOHN-ELZAM (M.D.) – Internal Medicine Physician, NPI 1568679736
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,448 INTERNAL MEDICINE in CT
Provider Addresses for DR. CERRAH LYNN MENDELSOHN-ELZAM (M.D.)
7 RIVERSVILLE RD STE 1
GREENWICH, CT 068313697
Phone: (203) 531-1808
Fax: (203) 531-8326
Type: Location
67 MOUNTAIN AVE
LARCHMONT, NY 105381936
Phone: (917) 440-0782
Type: Mailing
Greenwich Hospital, 5, Perryridge Road, Greenwich, Fairfield County, Connecticut, 06830, United States
GREENWICH HOSPITAL
GREENWICH, CT 068304697
Phone: (203) 863-3639
Type: Location
410, Central Park West, Manhattan Valley, Manhattan Community Board 7, Manhattan, New York County, New York, 10025, United States
APARTMENT 14D
NEW YORK, NY 100254848
Phone: (917) 440-0782
Type: Mailing
5 Perryridge Road
Greenwich Hospital
Greenwich, CT 068304697
Phone: (203) 863-3639
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 12 Open Payments records for all available years, with a total value of $313.
Total Amount is formed as General ($313) + Research ($0) + Ownership ($0) = $313.
Last reported payment date: 2024-12-05 • Largest payer in this snapshot: Exact Sciences Corporation ($164).
Total Amount
$313
General + Research + Ownership
Payments
12
Total payment records
General Amount
$313
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Exact Sciences Corporation | $164 |
| PFIZER INC. | $51 |
| GlaxoSmithKline, LLC. | $37 |
| ABBVIE INC. | $21 |
| Abbott Laboratories | $21 |
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: 2007-07-20
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 |
|---|---|---|---|---|
| I20070720000405 | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 156 | 85 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 100 | 87 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 84 | 83 | $0 |
| G0442 | Annual alcohol misuse screening, 5 to 15 minutes | 80 | 80 | $0 |
| 99497 | Advance care planning, first 30 minutes | 77 | 76 | $0 |
Insurance plans in this area (ZIP 06831)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CT | |
| Internal Medicine | CT | |
| Internal Medicine | NY | |
| Internal Medicine, Infectious Disease | CT | |
| Internal Medicine | CT |
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