DR. MARISSA VALENCIA YLAGAN (MD) – Maternal & Fetal Medicine Physician, NPI 1942266051
Maternal & Fetal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. MARISSA VALENCIA YLAGAN (MD)
502 MADISON OAK DR STE 210
SAN ANTONIO, TX 782584192
Phone: (210) 481-3000
Type: Location
315 N SAN SABA STE 1135
SAN ANTONIO, TX 782073255
Phone: (210) 704-3342
Type: Mailing
502 Madison Oak Dr Ste 210
San Antonio, TX 782584192
Phone: (210) 481-3000
Type: Location
San Antonio Post Office, San Marcelino-San Antonio-San Narciso Road, Rizal, Luna, Poblacion, San Antonio, Zambales, Central Luzon, 2206, Philippines
SAN ANTONIO, TX 782982271
Phone: (210) 481-3000
Type: Mailing
315 N SAN SABA STE 930
SAN ANTONIO, TX 782073154
Phone: (210) 704-3200
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 $125.
Total Amount is formed as General ($125) + Research ($0) + Ownership ($0) = $125.
Last reported payment date: 2023-03-10 • Largest payer in this snapshot: Dexcom, Inc. ($125).
Total Amount
$125
General + Research + Ownership
Payments
1
Total payment records
General Amount
$125
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-03-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Dexcom, Inc. | $125 |
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: 2019-03-14
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 |
|---|---|---|---|---|
| I20190314002505 | I | Obstetrics/Gynecology | TX | 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 78258)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | IL | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX |
Reviews
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