DR. PATRICK MICHAEL DIFFERDING (MD) – Ophthalmology Physician, NPI 1356871016
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
958 OPHTHALMOLOGY in IL
Provider Addresses for DR. PATRICK MICHAEL DIFFERDING (MD)
1120 W LAKE COOK RD
BUFFALO GROVE, IL 600891970
Phone: (847) 459-6060
Fax: (847) 459-7575
Type: Location
21st Avenue S, Nashville, Davidson County, Tennessee, 37215, United States
NASHVILLE, TN 372320011
Phone: (615) 343-6642
Fax: (615) 322-0689
Type: Location
20508, Hellenic Drive, Olympia Fields, Rich Township, Cook County, Illinois, 60461, United States
OLYMPIA FIELDS, IL 604611424
Phone: (708) 209-8931
Type: Mailing
1300 N HIGHLAND AVE STE 1
AURORA, IL 605061481
Phone: (630) 897-5104
Fax: (630) 897-5089
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 17 Open Payments records for all available years, with a total value of $325.
Total Amount is formed as General ($325) + Research ($0) + Ownership ($0) = $325.
Last reported payment date: 2024-11-12 • Largest payer in this snapshot: ABBVIE INC. ($81).
Total Amount
$325
General + Research + Ownership
Payments
17
Total payment records
General Amount
$325
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 |
|---|---|
| ABBVIE INC. | $81 |
| Alcon Vision LLC | $63 |
| NEW WORLD MEDICAL,INC. | $35 |
| Oyster Point Pharma, Inc. | $25 |
| Bausch & Lomb Americas Inc. | $25 |
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: 2022-01-18
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 |
|---|---|---|---|---|
| I20220118001494 | I | Ophthalmology | 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 |
|---|---|---|---|---|
| 92012 | Established patient problem focused exam of visual system | 137 | 101 | $0 |
| 92004 | New patient complete exam of visual system | 132 | 132 | $0 |
| 92134 | Imaging of retina | 72 | 71 | $0 |
| 92014 | Established patient complete exam of visual system | 68 | 63 | $0 |
| 92133 | Imaging of optic nerve | 50 | 47 | $0 |
Insurance plans in this area (ZIP 60089)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | IL | |
| O P H T H A L M O L O G Y | IL | |
| O P H T H A L M O L O G Y | IL | |
| O P H T H A L M O L O G Y | IL | |
| O P H T H A L M O L O G Y | IL |
Reviews
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