MARIAM GABRIELA ZELAYA MEJIA MD
NPI 1336870500
Family Medicine in Mcallen, TX

Q: What is Mariam Zelaya Mejia's NPI number?

The NPI number for Mariam Zelaya Mejia is 1336870500. It was assigned to this individual provider in the NPPES registry on June 20, 2022.

Q: What is Mariam Zelaya Mejia's specialty?

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

Active since June 20, 2022PECOS Enrolled

5128 N 10TH ST, MCALLEN, TX 78504(956) 631-3831 Get Directions Write a Review

NPPES record last updated: August 11, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 11, 2026, Aug 7, 2026 (2 updates tracked since 2026).

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About Mariam Gabriela Zelaya Mejia Md NPPES

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

MARIAM GABRIELA ZELAYA MEJIA MD (NPI 1336870500) is an individual family medicine provider in Mcallen, Texas, licensed in Texas (W8474) and active in the NPI registry since June 2022. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1336870500

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameMARIAM GABRIELA ZELAYA MEJIACredential: MD

Location Address5128 N 10TH STMcallen, TX 78504-2834

Mailing Address1810 Sunset DrMission, TX 78572-8004 · (463) 253-5427

Phone(956) 631-3831

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateJune 20, 2022

Last NPPES UpdateAugust 11, 20262 updates tracked since enumeration

NPPES CertifiedAugust 11, 2026

✔ NPI 1336870500 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in TX · W8474

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.

Also ListedFamily Medicine · Geriatric MedicineTaxonomy 207QG0300X · License W8474 (TX)

5128 N 10TH ST, Mcallen, TX 78504

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mariam Gabriela Zelaya Mejia Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2466832506

PECOS Enrollment IDI20260825004765

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 Reassignment

Medicare enrollment records show Mariam Zelaya Mejia reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

South Texas Physician Partners PLLC

4.7 mi

Internal Medicine

1920 E GRIFFIN PKWY
Mission, TX 78572

Reassigned Medicare billing, Texas enrollment
66 clinicians in this Medicare group

NPI 1801580097 (956) 468-2999

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.

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210009

Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78504 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 8

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

DR. LUIS JR DELGADO M.D.

Family Medicine