MRS. LILY MARK -MAASDAM (O.D.) – Optometrist, NPI 1477536423
Optometrist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
503 OPTOMETRY in IA
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Provider Addresses for MRS. LILY MARK -MAASDAM (O.D.)
100, South 5th Street, Knoxville, Knoxville Township, Marion County, Iowa, 50138, United States
KNOXVILLE, IA 501381712
Phone: (641) 842-3616
Fax: (641) 842-5453
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $43.
Total Amount is formed as General ($43) + Research ($0) + Ownership ($0) = $43.
Last reported payment date: 2024-05-28 • Largest payer in this snapshot: Oyster Point Pharma, Inc. ($30).
Total Amount
$43
General + Research + Ownership
Payments
3
Total payment records
General Amount
$43
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Oyster Point Pharma, Inc. | $30 |
| Bausch & Lomb Americas Inc. | $13 |
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: 2010-07-28
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 |
|---|---|---|---|---|
| I20100728000839 | I | Optometry | IA | 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 |
|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | 407 | 406 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 135 | 88 | $0 |
| 92250 | Photography of the retina | 123 | 122 | $0 |
| 66984 | Removal of cataract with insertion of prosthetic lens | 39 | 23 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 31 | 31 | $0 |
Insurance plans in this area (ZIP 50138)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| O P T O M E T R Y | IA |
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