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MARCOS A. AYALA RIVERA M.D.
NPI 1194772640
General Practice in Mayaguez, PR

Active since May 30, 2006PECOS EnrolledAccepts Medicare Assignment
167E CALLE RAMOS ANTONINI, MAYAGUEZ, PR 00680(787) 833-5235 Get Directions Write a Review

NPPES record last updated: August 16, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Marcos A. Ayala Rivera M.d. NPPES

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

MARCOS A. AYALA RIVERA M.D. (NPI 1194772640) is an individual general practice provider in Mayaguez, Puerto Rico, licensed in Puerto Rico (6806) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1980).

NPPES Registry Identity

NPI1194772640
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameMARCOS A. AYALA RIVERACredential: M.D.
Location Address167E CALLE RAMOS ANTONINIMayaguez, PR 00680-5039
Mailing AddressPo Box 1568Mayaguez, PR 00681-1568 · (787) 833-5235
Phone(787) 833-5235
Sole ProprietorYes
Medical School CMSOtherGraduated 1980
Enumeration DateMay 30, 2006
Last NPPES UpdateAugust 16, 2011
✔ NPI 1194772640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in PR · 6806
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
167E CALLE RAMOS ANTONINI, Mayaguez, PR 00680
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Other Identifiers 1

Medicare UPINC77635PR

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

Marcos A. Ayala Rivera 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 ID345309316
PECOS Enrollment IDI20081105000428
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 Marcos Ayala Rivera reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ayala Preventive Medicine Psc
Same address
Primary Care
167 CALLE RAMOS ANTONINI E
Mayaguez, PR 00680
  • Reassigned Medicare billing, Puerto Rico enrollment
NPI 1255636437 (787) 833-5235

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

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 Marcos Ayala Rivera's NPI number?

The NPI number for Marcos Ayala Rivera is 1194772640. It was assigned to this individual provider in the NPPES registry on May 30, 2006.

Where is Marcos Ayala Rivera located?

Marcos Ayala Rivera practices at 167E Calle Ramos Antonini, Mayaguez, PR 00680. The listed phone number is (787) 833-5235.

What is Marcos Ayala Rivera's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Marcos Ayala Rivera enrolled in Medicare?

Yes. Marcos Ayala Rivera 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 Marcos Ayala Rivera's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marcos Ayala Rivera reassigns Medicare benefits to Ayala Preventive Medicine Psc (Mayaguez, 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 Marcos Ayala Rivera'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 Marcos Ayala Rivera was last updated on August 16, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.