MARK K SANTILLAN (M.D.) – Maternal & Fetal Medicine Physician, NPI 1114137668
Maternal & Fetal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
359 OBSTETRICS/GYNECOLOGY in IA
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Provider Addresses for MARK K SANTILLAN (M.D.)
University of Iowa Hospitals & Clinics, 200, Hawkins Drive, Iowa City, Johnson County, Iowa, 52245, United States
IOWA CITY, IA 522421009
Phone: (319) 356-1616
Fax: (319) 384-6004
Type: Mailing
1360 N Dodge St
Iowa City, IA 522456114
Phone: (319) 356-2294
Fax: (319) 384-9693
Type: Location
500 E Market St
Iowa City, IA 522452633
Phone: (319) 339-3551
Fax: (319) 248-7945
Type: Location
3385 Dexter Ct Ste 110
Davenport, IA 528073475
Phone: (563) 355-2244
Fax: (319) 356-3949
Type: Location
105 E 9th St
Coralville, IA 522412209
Phone: (319) 467-2000
Fax: (319) 467-2510
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $500.
Total Amount is formed as General ($500) + Research ($0) + Ownership ($0) = $500.
Last reported payment date: 2023-07-19 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($500).
Total Amount
$500
General + Research + Ownership
Payments
1
Total payment records
General Amount
$500
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-07-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $500 |
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: 2007-08-08
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 |
|---|---|---|---|---|
| I20070808000145 | I | Obstetrics/Gynecology | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 52242)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IA | |
| - | IA | |
| - | IA | |
| - | CA | |
| O P H T H A L M O L O G Y | IA | |
| - | IA | |
| - | IA | |
| - | IA | |
| - | CA | |
| - | IA |
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