WALID ZAIRI CRNA
NPI 1558808428
Nurse Anesthetist, Certified Registered in Concord, MA
About Walid Zairi Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALID ZAIRI CRNA (NPI 1558808428) is an individual nurse anesthetist, certified registered in Concord, Massachusetts, licensed in Massachusetts (RN2308491) and active in the NPI registry since January 2017. He is enrolled in Medicare PECOS, is affiliated with Emerson Hospital -, and maintains a secondary practice location in Cambridge.
NPPES Registry Identity
Specialties & Licenses
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
Walid Zairi Crna 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
6Medicare enrollment records show Walid Zairi reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Concord, MA 01742
- Reassigned Medicare billing, Massachusetts enrollment
- 72 clinicians in this Medicare group
Lawrence, MA 01842
- Reassigned Medicare billing, Massachusetts enrollment
- 231 clinicians in this Medicare group
Fall River, MA 02720
- Reassigned Medicare billing, Massachusetts enrollment
- 192 clinicians in this Medicare group
Fall River, MA 02721
- Reassigned Medicare billing, Massachusetts enrollment
- 347 clinicians in this Medicare group
Fairhaven, MA 02719
- Reassigned Medicare billing, Massachusetts enrollment
- 1,144 clinicians in this Medicare group
Richardson, TX 75082
- Reassigned Medicare billing, Arizona enrollment
- 390 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 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.
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 01742 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.
CONCORD, MA 01742
CONCORD, MA 01742
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 Walid Zairi's NPI number?
The NPI number for Walid Zairi is 1558808428. It was assigned to this individual provider in the NPPES registry on January 30, 2017.
Where is Walid Zairi located?
Walid Zairi practices at 133 Old Road To 9 Acre Cor, Concord, MA 01742. The listed phone number is (978) 369-1400.
What is Walid Zairi's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Walid Zairi enrolled in Medicare?
Yes. Walid Zairi 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 Walid Zairi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Walid Zairi reassigns Medicare benefits to 6 organizations: Emerson Practice Associates II, Inc. (Concord, MA), Lawrence Anesthesia Services, LLC (Lawrence, MA), North American Partners In Anesthesia Massachusetts LLC (Fall River, MA), Steward Medical Group, Inc (Fall River, MA), Southcoast Physicians Group, Inc. (Fairhaven, MA) and 1 more organization, listed in the Medicare section above. 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 Walid Zairi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Walid Zairi accept?
Health plans from Oscar Health, Oscar Health Plan, Inc. and Oscar Insurance Company list Walid Zairi 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 Walid Zairi affiliated with any hospitals?
According to CMS data, Walid Zairi is affiliated with Emerson Hospital -.
When was this NPI record last updated?
The NPPES record for Walid Zairi was last updated on September 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Walid Zairi, CRNA · NPI 1558808428
Nurse Anesthetist, Certified Registered physician in Concord, Massachusetts. Individual provider, active in the CMS NPPES registry since January 30, 2017.
## Identity
- **NPI:** 1558808428 (Entity type: Individual)
- **Enumerated:** January 30, 2017
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** RN2308491 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 133 OLD ROAD TO 9 ACRE COR, Concord, MA 01742-4159
- **Phone:** (978) 369-1400
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Emerson Practice Associates II, Inc. (NPI 1427383645, Concord, MA); Lawrence Anesthesia Services, LLC (NPI 1467699918, Lawrence, MA); North American Partners In Anesthesia Massachusetts LLC (NPI 1457867020, Fall River, MA); Steward Medical Group, Inc (NPI 1043711914, Fall River, MA); Southcoast Physicians Group, Inc. (NPI 1861830143, Fairhaven, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** September 15, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1558808428) · Data from the CMS NPPES public registry.