DR. JULIO C. AYALA MD
NPI 1104883347
Internal Medicine - Gastroenterology in Cambridge, MA
About Dr. Julio C. Ayala Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JULIO C. AYALA MD (NPI 1104883347) is an individual gastroenterology provider in Cambridge, Massachusetts, licensed in Massachusetts (212396) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Emerson Hospital -, and is a graduate of Other (1990).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
Dr. Julio C. Ayala Md 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 Reassignments
2Medicare enrollment records show Julio Ayala reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cambridge, MA 02142
- Reassigned Medicare billing, Massachusetts enrollment
- 119 clinicians in this Medicare group
Concord, MA 01742
- Reassigned Medicare billing, Massachusetts enrollment
- 451 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.
Areas of Expertise CMS Part B claims 9
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Emerson Hospital -
Acute Care Hospitals · W Concord, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02138 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
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 Julio Ayala's NPI number?
The NPI number for Julio Ayala is 1104883347. It was assigned to this individual provider in the NPPES registry on May 1, 2006.
Where is Julio Ayala located?
Julio Ayala practices at 300 Mount Auburn St, Cambridge, MA 02138. The listed phone number is (617) 499-0026.
What is Julio Ayala's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Julio Ayala enrolled in Medicare?
Yes. Julio 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 organizations bill Medicare for Julio Ayala's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julio Ayala reassigns Medicare benefits to 2 organizations: Massachusetts Institute Of Technology (Cambridge, MA) and Emerson Practice Associates, Inc. (Concord, MA). Each 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 Julio Ayala's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Julio Ayala accept?
Health plans from Anthem Blue Cross and Blue Shield list Julio 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.
Is Julio Ayala affiliated with any hospitals?
According to CMS data, Julio Ayala is affiliated with Emerson Hospital -.
When was this NPI record last updated?
The NPPES record for Julio Ayala was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dr. Julio C. Ayala, MD · NPI 1104883347
Gastroenterology physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since May 1, 2006.
## Identity
- **NPI:** 1104883347 (Entity type: Individual)
- **Enumerated:** May 1, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 212396 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 300 MOUNT AUBURN ST, Cambridge, MA 02138-5600
- **Phone:** (617) 499-0026 · **Fax:** (617) 499-0032
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Massachusetts Institute Of Technology (NPI 1346308723, Cambridge, MA); Emerson Practice Associates, Inc. (NPI 1508020199, Concord, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare ID-Type Unspecified A33358 (MA); Medicare UPIN H51811 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1104883347) · Data from the CMS NPPES public registry.