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MARIELA ROMERO-DIAZ M.D.
NPI 1730382532
Emergency Medicine in Humacao, PR

Active since June 08, 2007PECOS Enrolled
HOSPITAL RYDER MEMORIAL INCS, AVE. FONT MARTELO, HUMACAO, PR 00791(787) 852-0768 Get Directions Write a Review

NPPES record last updated: May 21, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mariela Romero-diaz M.d. NPPES

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

MARIELA ROMERO-DIAZ M.D. (NPI 1730382532) is an individual emergency medicine provider in Humacao, Puerto Rico, licensed in Puerto Rico (17162) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1730382532
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameMARIELA ROMERO-DIAZCredential: M.D.
Location AddressHOSPITAL RYDER MEMORIAL INCS, AVE. FONT MARTELOHumacao, PR 00791
Mailing Address24 Calle Fantasia, Urb. Los SuenosGurabo, PR 00778-7803 · (787) 645-3220
Phone(787) 852-0768
Sole ProprietorNo
Enumeration DateJune 8, 2007
Last NPPES UpdateMay 21, 2013
✔ NPI 1730382532 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in PR · 17162
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
HOSPITAL RYDER MEMORIAL INCS, Humacao, PR 00791
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mariela Romero-diaz M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Mariela Romero-diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

ER Specialized Care LLC
Emergency Medical Services
715 AVE PONCE DE LEON
San Juan, PR 00917
  • Reassigned Medicare billing, Puerto Rico enrollment
  • 28 clinicians in this Medicare group
NPI 1144758814 (787) 758-2000

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

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
49 services46 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
47 services46 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
33 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 00791 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
$88.07 typical visit price
range $56.86 – $172.44
Typical copayment $22.01 (range $14.21 – $43.11)
Most-billed visit code 99203
Established Patient
$100.24 typical visit price
range $18.24 – $140.44
Typical copayment $25.06 (range $4.56 – $35.11)
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.

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 Mariela Romero-diaz's NPI number?

The NPI number for Mariela Romero-diaz is 1730382532. It was assigned to this individual provider in the NPPES registry on June 8, 2007.

Where is Mariela Romero-diaz located?

Mariela Romero-diaz practices at Hospital Ryder Memorial Incs Ave. Font Martelo, Humacao, PR 00791. The listed phone number is (787) 852-0768.

What is Mariela Romero-diaz's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Mariela Romero-diaz enrolled in Medicare?

Yes. Mariela Romero-diaz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mariela Romero-diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariela Romero-diaz reassigns Medicare benefits to ER Specialized Care LLC (San Juan, PR). The 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 Mariela Romero-diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mariela Romero-diaz was last updated on May 21, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.