Marissa Valencia Ylagan, MD
Maternal & Fetal Medicine Physician · San Antonio, TX
Marissa Valencia Ylagan, MD is a maternal & fetal medicine physician with a practice address in San Antonio, Texas, and NPI 1942266051, issued on Apr 26, 2006. Check the license (Texas S0595, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Marissa Valencia Ylagan
- Credential
- MD
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- S0595 TX
Self-reported in NPPES; status is on the state search - Practice location
- 315 N San Saba Ste 930, San Antonio, TX 78207
- Phone
- (210) 704-3200
- Enumerated
- Apr 26, 2006
- Record last updated
- Aug 17, 2023
- Medicaid ID
- 394520601 TX
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 308 in Texas → Look up another NPI →
Also registered at 315 N San Saba Ste 930
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Reinaldo Acosta, MDMaternal & Fetal Medicine Physician1619927571
- Rachel Ault, CGCGenetic Counselor (M.S.)1689189805
- Miavonna Craig, MSGenetic Counselor (M.S.)1902640980
- James Hill, M.D.Maternal & Fetal Medicine Physician1932178738
- Shontiara JohnsonGenetic Counselor (M.S.)1922734359
- Josephine Minick, MS, CGCGenetic Counselor (M.S.)1780483081
Verify Marissa Valencia Ylagan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S0595Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average maternal & fetal medicine physician in 2024
11 Medicare Part D claims, against an average of 41 among the 353 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Marissa Valencia Ylagan among 308 maternal & fetal medicine physician records in Texas
Marissa Valencia Ylagan, MD is one of 308 maternal & fetal medicine physician records with a practice address in Texas. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 54% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2023 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in Texas
There are 308 maternal & fetal medicine physician records in Texas.
All 308 in Texas → Every provider in San Antonio → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Reinaldo Acosta, MDSan Antonio, TX 782071619927571
- Angela Boyd, M.D.San Antonio, TX 782071609212331
- Shad Deering, M.D.San Antonio, TX 782071407836018
- Anna Gonzalez, MDSan Antonio, TX 782071346443538
- Celso Hernandez, M.D.San Antonio, TX 782071932100559
- Demetrice Hill, M.D.San Antonio, TX 782071407823735
- James Hill, M.D.San Antonio, TX 782071932178738
- Michelle LendeSan Antonio, TX 782071972965028
Common questions
What is Marissa Valencia Ylagan, MD's NPI number?
Marissa Valencia Ylagan, MD's National Provider Identifier (NPI) is 1942266051, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Valencia Ylagan, MD located?
The NPPES record lists a practice address at 315 N San Saba Ste 930, San Antonio, TX, 78207. Phone: (210) 704-3200. Providers update this record themselves, so call before visiting.
How can I verify Marissa Valencia Ylagan, MD's license?
NPPES lists Texas license number S0595, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marissa Valencia Ylagan, MD prescribe under Medicare Part D?
In 2024, Marissa Valencia Ylagan, MD had 11 Medicare Part D claims; the average among maternal & fetal medicine physician prescribers was 41. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.