Dr Marissa Valencia Ylagan, MD - Medicare Obstetrics & Gynecology in San Antonio, TX

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Dr Marissa Valencia Ylagan, MD is a medicare enrolled "Obstetrics & Gynecology - Maternal & Fetal Medicine" physician in San Antonio, Texas. Her current practice location is 315 N San Saba Ste 930, San Antonio, Texas. You can reach out to her office (for appointments etc.) via phone at (210) 704-3200.

Dr Marissa Valencia Ylagan is licensed to practice in Texas (license number S0595) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1942266051.

Contact Information

Dr Marissa Valencia Ylagan, MD
315 N San Saba Ste 930,
San Antonio, TX 78207-3154
(210) 704-3200
Not Available

Map and Direction




Physician's Profile

Full NameDr Marissa Valencia Ylagan
GenderFemale
SpecialityObstetrics & Gynecology - Maternal & Fetal Medicine
Location315 N San Saba Ste 930, San Antonio, Texas
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1942266051
  • Provider Enumeration Date: 04/26/2006
  • Last Update Date: 08/17/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 2163423369
  • Enrollment ID: I20190314002505

Medical Identifiers

Medical identifiers for Dr Marissa Valencia Ylagan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1942266051NPI-NPPES
394520601MedicaidTX

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology S0595 (Texas)Secondary
207VM0101XObstetrics & Gynecology - Maternal & Fetal Medicine S0595 (Texas)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Marissa Valencia Ylagan allows following entities to bill medicare on her behalf.
Entity NameBhs Physicians Network Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1598958431
PECOS PAC ID: 7315019593
Enrollment ID: O20080703000069
Entity NameBaylor College Of Medicine
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285079764
PECOS PAC ID: 0648405738
Enrollment ID: O20131025000939

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Marissa Valencia Ylagan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Marissa Valencia Ylagan, MD
315 N San Saba Ste 1135,
San Antonio, TX 78207-3255

Ph: (210) 704-3342		Dr Marissa Valencia Ylagan, MD
315 N San Saba Ste 930,
San Antonio, TX 78207-3154

Ph: (210) 704-3200

Reviews and Comments


Obstetrics & Gynecology Doctors in San Antonio, TX

Stephanie Schaefer, M.D.
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Practice Location: 525 Oak Centre Dr Ste 300, San Antonio, TX 78258
Phone: 210-402-6022    
James Paine, M.D.
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Practice Location: 7703 Floyd Curl Dr, San Antonio, TX 78229
Phone: 210-257-1400    Fax: 210-257-1428
Dr. Lynn Tavares Parente, M.D.
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Practice Location: 502 Madison Oak Dr Ste 240, San Antonio, TX 78258
Phone: 210-495-1900    Fax: 210-650-5975
Dr. Antonio Santillan-gomez, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 4411 Medical Dr, Ste. 100, San Antonio, TX 78229
Phone: 210-595-5300    Fax: 210-595-5301
Dr. Rorey Marie Walsh, M.D.
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 4502 Medical Dr, San Antonio, TX 78229
Phone: 210-616-8100    
Dr. Charles A Holshouser Jr., M.D.
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 4499 Medical Dr #183, San Antonio, TX 78229
Phone: 210-692-5200    Fax: 210-692-7725
Patrick Lane Williamson, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 7950 Floyd Curl Drive, Suite 300, San Antonio, TX 78229
Phone: 210-615-6505    Fax: 210-615-1321

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.