Marcela Riojas, M.D.
Family Medicine Physician · San Antonio, TX
Marcela Riojas, M.D. is a family medicine physician with a practice address in San Antonio, Texas, and NPI 1841456332, issued on Aug 4, 2008. Check the license (Texas N8238, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Marcela Riojas
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- N8238 TX
Self-reported in NPPES; status is on the state search - Practice location
- 418 N Loop 1604 W, San Antonio, TX 78232
- Phone
- (210) 595-1019
- Enumerated
- Aug 4, 2008
- Record last updated
- Aug 30, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (210) 251-3194
- Medicaid ID
- 219271802 TX
- Medicare enrollment
- Enrolled (PECOS I20110221000730); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 418 N Loop 1604 W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marcela Riojas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N8238Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
30 Medicare Part D claims for 12 beneficiaries, against an average of 3,544 among the 117,163 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.
Bills Medicare through 2 group practices
- South Texas Rural Health Services IncEncinal, TX
- Villagemd OF Southeast Texas PAHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcela Riojas among 11,119 family medicine physician records in Texas
Marcela Riojas, M.D. is one of 11,119 family medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 55% of them.
- NPI issued2008 · 55% of these records are older, 41% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2005 · median 2004 among the 7,095 with a school on file
- Record last updated2018 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
809 family medicine physician records list a practice address in San Antonio
They are 809 of the 37,749 NPPES records with a practice address in San Antonio, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in San Antonio → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Segundo Briones, M.D.San Antonio, TX 782321689688608
- Rafael Fornaris, M.D.San Antonio, TX 782321083742829
- John Green, MDSan Antonio, TX 782321649277344
- Nasha Holt, M.D.San Antonio, TX 782321639282809
- James Lackey, MDSan Antonio, TX 782321730255050
- Shauna Lyn, M.D.San Antonio, TX 782321437214624
- Norma Macias, M.D.San Antonio, TX 782321669446308
- Christine Norton, D.O.San Antonio, TX 782321487659157
Common questions
What is Marcela Riojas, M.D.'s NPI number?
Marcela Riojas, M.D.'s National Provider Identifier (NPI) is 1841456332, issued on Aug 4, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Marcela Riojas, M.D. located?
The NPPES record lists a practice address at 418 N Loop 1604 W, San Antonio, TX, 78232. Phone: (210) 595-1019. Providers update this record themselves, so call before visiting.
How can I verify Marcela Riojas, M.D.'s license?
NPPES lists Texas license number N8238, 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 Marcela Riojas, M.D. prescribe under Medicare Part D?
In 2024, Marcela Riojas, M.D. had 30 Medicare Part D claims for 12 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.