DR. ROBERT CHRISTIAN NULL (MD) – Glaucoma Specialist (Ophthalmology) Physician, NPI 1932547866
Glaucoma Specialist (Ophthalmology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
235 OPHTHALMOLOGY in IA
Provider Addresses for DR. ROBERT CHRISTIAN NULL (MD)
4801 S CLIFF AVE STE 100
INDEPENDENCE, MO 640556954
Phone: (816) 478-1230
Fax: (816) 350-4585
Type: Mailing
1195 Boyson Rd Ste 200
Hiawatha, IA 52233
Phone: (319) 362-8032
Type: Location
2225 Mormon Trek Blvd Ste 100
Iowa City, IA 522464407
Phone: (319) 337-5770
Type: Location
309 E Church St
Marshalltown, IA 501582946
Phone: (641) 754-6200
Type: Location
4741 S COCHISE DR
INDEPENDENCE, MO 64055
Phone: (816) 478-1230
Fax: (816) 478-4413
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $95.
Total Amount is formed as General ($95) + Research ($0) + Ownership ($0) = $95.
Last reported payment date: 2024-09-18 • Largest payer in this snapshot: ABBVIE INC. ($95).
Total Amount
$95
General + Research + Ownership
Payments
5
Total payment records
General Amount
$95
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $95 |
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: 2019-06-03
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 |
|---|---|---|---|---|
| I20190531001894 | I | Ophthalmology | KS | TBD |
| I20190603001511 | I | Ophthalmology | MO | 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 | 444 | 423 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 377 | 281 | $0 |
| 92133 | Imaging of optic nerve | 283 | 278 | $0 |
| 92012 | Established patient problem focused exam of visual system | 219 | 168 | $0 |
| 92083 | Exam of visual field with extended testing | 206 | 202 | $0 |
Insurance plans in this area (ZIP 64055)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | AZ | |
| O P T O M E T R Y | MO | |
| O P T O M E T R Y | KS | |
| O P T O M E T R Y | MO | |
| O P T O M E T R Y | MO | |
| O P H T H A L M O L O G Y | MO | |
| - | MO | |
| O P H T H A L M O L O G Y | KY | |
| O P T O M E T R Y | MO | |
| O P H T H A L M O L O G Y | MO |
Reviews
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