DIOMERI DIAZ ESPINOSA FNP
NPI 1538836408
Nurse Practitioner - Primary Care in Lawrence, MA
About Diomeri Diaz Espinosa Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIOMERI DIAZ ESPINOSA FNP (NPI 1538836408) is an individual primary care provider in Lawrence, Massachusetts, licensed in Massachusetts (RN2350015) and active in the NPI registry since August 2021. She is enrolled in Medicare PECOS, is affiliated with Lawrence General Hospital, and maintains a secondary practice location in Lawrence.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Diomeri Diaz Espinosa Fnp 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
3Medicare enrollment records show Diomeri Diaz Espinosa reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lawrence, MA 01841
- Reassigned Medicare billing, Massachusetts enrollment
- 143 clinicians in this Medicare group
Haverhill, MA 01830
- Reassigned Medicare billing, Massachusetts enrollment
- 350 clinicians in this Medicare group
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 994 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lawrence General Hospital
Acute Care Hospitals · Lawrence, MANorth Shore Medical Center -
Acute Care Hospitals · Salem, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01843 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.
LAWRENCE, MA 01843
LAWRENCE, MA 01843
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 Diomeri Diaz Espinosa's NPI number?
The NPI number for Diomeri Diaz Espinosa is 1538836408. It was assigned to this individual provider in the NPPES registry on August 27, 2021.
Where is Diomeri Diaz Espinosa located?
Diomeri Diaz Espinosa practices at 500 Merrimack St, Lawrence, MA 01843. The listed phone number is (978) 557-9800.
What is Diomeri Diaz Espinosa's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.
Is Diomeri Diaz Espinosa enrolled in Medicare?
Yes. Diomeri Diaz Espinosa 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 Diomeri Diaz Espinosa's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diomeri Diaz Espinosa reassigns Medicare benefits to 3 organizations: Greater Lawrence Family Health Center, Inc. (Lawrence, MA), Mass General Brigham Community Physicians Inc. (Haverhill, MA) and Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, 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 Diomeri Diaz Espinosa's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Diomeri Diaz Espinosa accept?
Health plans from Anthem Blue Cross and Blue Shield list Diomeri Diaz Espinosa 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 Diomeri Diaz Espinosa affiliated with any hospitals?
According to CMS data, Diomeri Diaz Espinosa is affiliated with Lawrence General Hospital and North Shore Medical Center -.
When was this NPI record last updated?
The NPPES record for Diomeri Diaz Espinosa was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.
# Diomeri Diaz Espinosa, FNP · NPI 1538836408
Primary Care physician in Lawrence, Massachusetts. Individual provider, active in the CMS NPPES registry since August 27, 2021.
## Identity
- **NPI:** 1538836408 (Entity type: Individual)
- **Enumerated:** August 27, 2021
- **Primary specialty:** Nurse Practitioner - Primary Care · taxonomy 363LP2300X
- **State license:** RN2350015 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 500 MERRIMACK ST, Lawrence, MA 01843-1981
- **Phone:** (978) 557-9800
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Greater Lawrence Family Health Center, Inc. (NPI 1013284843, Lawrence, MA); Mass General Brigham Community Physicians Inc. (NPI 1891112637, Haverhill, MA); Mass General Brigham Medical Group Northern Massachusetts Inc (NPI 1588606123, Salem, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** October 14, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1538836408) · Data from the CMS NPPES public registry.