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DR. MARCELA RIOJAS M.D.
NPI 1841456332
Family Medicine in San Antonio, TX

Active since August 04, 2008PECOS EnrolledAccepts Medicare Assignment
418 N LOOP 1604 W, SAN ANTONIO, TX 78232(210) 595-1019(210) 251-3194 Get Directions Write a Review

NPPES record last updated: August 30, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Marcela Riojas M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARCELA RIOJAS M.D. (NPI 1841456332) is an individual family medicine provider in San Antonio, Texas, licensed in Texas (N8238) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS, is affiliated with Houston Methodist Willowbrook Hospital, and is a graduate of Other (2005).

NPPES Registry Identity

NPI1841456332
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MARCELA RIOJASCredential: M.D.
Location Address418 N LOOP 1604 WSan Antonio, TX 78232
Mailing Address418 N Loop 1604 WSan Antonio, TX 78232-1456 · (210) 595-1019 · Fax (210) 251-3194
Phone(210) 595-1019
Fax(210) 251-3194
Sole ProprietorNo
Medical School CMSOtherGraduated 2005
Enumeration DateAugust 4, 2008
Last NPPES UpdateAugust 30, 2018
✔ NPI 1841456332 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in TX · N8238
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
418 N LOOP 1604 W, San Antonio, TX 78232
Open in Google Maps ↗

Other Identifiers 2

Other219271803TX · Cshcn
Medicaid219271802TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Marcela Riojas M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8325229586
PECOS Enrollment IDI20110221000730, I20200526002447
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

6

Medicare enrollment records show Marcela Riojas reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Community Medicine Associates
15 mi
Family Medicine
903 W MARTIN ST # MS 49-2
San Antonio, TX 78207
  • Reassigned Medicare billing, Texas enrollment
  • 1,129 clinicians in this Medicare group
NPI 1245313329 (210) 358-3401
Texas Healthnet Medical Clinic Ltd.
25 mi
Family Medicine
12730 W IH 10, SUITE 306
San Antonio, TX 78230
  • Reassigned Medicare billing, Texas enrollment
  • 11 clinicians in this Medicare group
NPI 1578631040 (210) 877-0772
Dr Rogers Medical Group PA.
27 mi
Internal Medicine
2838 N LOOP 1604 E, STE 104
San Antonio, TX 78232
  • Reassigned Medicare billing, Texas enrollment
  • 9 clinicians in this Medicare group
NPI 1700928967 (210) 495-2117
South Texas Rural Health Services Inc
70 mi
Federally Qualified Health Center (FQHC)
105 S STEWART
Cotulla, TX 78014
  • Reassigned Medicare billing, Texas enrollment
  • 2 clinicians in this Medicare group
NPI 1952337263 (830) 879-3048
Sharon Hausman-Cohen, MD, PA
91 mi
Primary Care
3410 FAR WEST BLVD STE 100
Austin, TX 78731
  • Reassigned Medicare billing, Texas enrollment
  • 8 clinicians in this Medicare group
NPI 1730325846 (512) 717-9775
Village Family Practice, L.L.P
185 mi
Family Medicine
9055 KATY FWY STE 200
Houston, TX 77024
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Villagemd Of Southeast Texas PA
  • 207 clinicians in this Medicare group
NPI 1083619191 (713) 461-2915

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Houston Methodist Willowbrook Hospital

Acute Care Hospitals · Houston, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450844
Location18220 State Highway 249Houston, TX 77070 · Harris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78232 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BARRIO COMPREHENSIVE FAMILY HEALTH CARE CENTER, INC.
Clinic/Center (Federally Qualified Health Center (FQHC))
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 233-7000
ROCHELE MARIE NICOLAS-WEDIGE FNP
Nurse Practitioner (Family)
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 595-1019
CHRISTA KAY CRUMRINE NP
Nurse Practitioner (Family)
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 233-7000
DR. SHAUNA LYN M.D.
Family Medicine
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 595-1019
TIARA DAVISON FNP-BC
Nurse Practitioner (Family)
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 595-1019
DR. ADRIENNE WENDY ASKEW M.D.
Obstetrics & Gynecology
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 595-1019
MEHER NICOLWALA DO
Family Medicine
418 N LOOP 1604 W
SAN ANTONIO, TX 78232
Bexar County (210) 233-7000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marcela Riojas's NPI number?

The NPI number for Marcela Riojas is 1841456332. It was assigned to this individual provider in the NPPES registry on August 4, 2008.

Where is Marcela Riojas located?

Marcela Riojas practices at 418 N Loop 1604 W, San Antonio, TX 78232. The listed phone number is (210) 595-1019.

What is Marcela Riojas's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Marcela Riojas enrolled in Medicare?

Yes. Marcela Riojas is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Marcela Riojas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marcela Riojas reassigns Medicare benefits to 6 organizations: Community Medicine Associates (San Antonio, TX), Texas Healthnet Medical Clinic Ltd. (San Antonio, TX), Dr Rogers Medical Group PA. (San Antonio, TX), South Texas Rural Health Services Inc (Cotulla, TX), Sharon Hausman-Cohen, MD, PA (Austin, TX) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marcela Riojas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marcela Riojas accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 6 other insurers list Marcela Riojas as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marcela Riojas affiliated with any hospitals?

According to CMS data, Marcela Riojas is affiliated with Houston Methodist Willowbrook Hospital.

When was this NPI record last updated?

The NPPES record for Marcela Riojas was last updated on August 30, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.