SERGIO ARELLANO-AYALA NP
NPI 1891328779
Nurse Practitioner - Acute Care in Baltimore, MD
About Sergio Arellano-ayala Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SERGIO ARELLANO-AYALA NP (NPI 1891328779) is an individual acute care provider in Baltimore, Maryland, licensed in Texas (AP144156) and active in the NPI registry since February 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Accepted 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
Sergio Arellano-ayala Np 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.
Medicare Billing Reassignment
Medicare enrollment records show Sergio Arellano-ayala reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Antonio, TX 78216
- Reassigned Medicare billing, Texas enrollment
- 14 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Sergio Arellano-ayala's NPI number?
The NPI number for Sergio Arellano-ayala is 1891328779. It was assigned to this individual provider in the NPPES registry on February 19, 2020.
Where is Sergio Arellano-ayala located?
Sergio Arellano-ayala practices at 22 S Greene St # S4d03, Baltimore, MD 21201. The listed phone number is (410) 328-5831.
What is Sergio Arellano-ayala's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Sergio Arellano-ayala enrolled in Medicare?
Yes. Sergio Arellano-ayala 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 organization bills Medicare for Sergio Arellano-ayala's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sergio Arellano-ayala reassigns Medicare benefits to Leonard E Deal, MD, PA (San Antonio, TX). 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 Sergio Arellano-ayala's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sergio Arellano-ayala accept?
Health plans from Oscar Insurance Company and WellPoint list Sergio Arellano-ayala 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.
When was this NPI record last updated?
The NPPES record for Sergio Arellano-ayala was last updated on February 19, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Sergio Arellano-Ayala, NP · NPI 1891328779
Acute Care physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since February 19, 2020.
## Identity
- **NPI:** 1891328779 (Entity type: Individual)
- **Enumerated:** February 19, 2020
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** AP144156 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 22 S GREENE ST # S4D03, Baltimore, MD 21201-1544
- **Phone:** (410) 328-5831
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Leonard E Deal, MD, PA (NPI 1790971067, San Antonio, TX), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** February 19, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1891328779) · Data from the CMS NPPES public registry.