MR. WILLIAM CARL RIVERA CRNA
NPI 1205995529
Nurse Anesthetist, Certified Registered in Concord, NH
About Mr. William Carl Rivera Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM CARL RIVERA CRNA (NPI 1205995529) is an individual nurse anesthetist, certified registered in Concord, New Hampshire, licensed in New Hampshire (084359-23) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Tidalhealth Peninsula Regional, Inc, and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Mr. William Carl Rivera 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
9Medicare enrollment records show William Rivera reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Farmington, NH 03835
- Reassigned Medicare billing, New Hampshire enrollment
- 30 clinicians in this Medicare group
Middleton, MA 01949
- Reassigned Medicare billing, New Hampshire enrollment
- 49 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: University Of Maryland Medical System Corporation
- 148 clinicians in this Medicare group
Annapolis, MD 21401
- Reassigned Medicare billing, Maryland enrollment
- 548 clinicians in this Medicare group
Chevy Chase, MD 20815
- Reassigned Medicare billing, District of Columbia enrollment
- 78 clinicians in this Medicare group
Prince Frederick, MD 20678
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 196 clinicians in this Medicare group
Leesburg, VA 20176
- Reassigned Medicare billing, Virginia and District of Columbia enrollments
- Also billed through NPI 1417994872 (District of Columbia)
- 1,217 clinicians in this Medicare group
Pensacola, FL 32502
- Reassigned Medicare billing, Maryland enrollment
- 80 clinicians in this Medicare group
Richardson, TX 75082
- Reassigned Medicare billing, New Hampshire enrollment
- 87 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 6
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Tidalhealth Peninsula Regional, Inc
Acute Care Hospitals · Salisbury, MDAtlantic General Hospital
Acute Care Hospitals · Berlin, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CONCORD, NH 03301
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 William Rivera's NPI number?
The NPI number for William Rivera is 1205995529. It was assigned to this individual provider in the NPPES registry on December 6, 2006.
Where is William Rivera located?
William Rivera practices at 116 Langley Pkwy, Concord, NH 03301. The listed phone number is (603) 228-7211.
What is William Rivera's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is William Rivera enrolled in Medicare?
Yes. William 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 organizations bill Medicare for William Rivera's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Rivera reassigns Medicare benefits to 9 organizations: Collaborative Anesthesia Partners (Farmington, NH), Icon Anesthesia Services Of New England LLC (Middleton, MA), University Of Maryland Medical Center (Baltimore, MD), Anesthesia Company, LLC (Annapolis, MD), Capital Anesthesia Partners, LLC (Chevy Chase, MD) and 4 more organizations, 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 William Rivera's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Rivera accept?
Health plans from Oscar Insurance Company list William Rivera 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 William Rivera affiliated with any hospitals?
According to CMS data, William Rivera is affiliated with Tidalhealth Peninsula Regional, Inc and Atlantic General Hospital.
When was this NPI record last updated?
The NPPES record for William Rivera was last updated on December 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mr. William Carl Rivera, CRNA · NPI 1205995529
Nurse Anesthetist, Certified Registered physician in Concord, New Hampshire. Individual provider, active in the CMS NPPES registry since December 6, 2006.
## Identity
- **NPI:** 1205995529 (Entity type: Individual)
- **Enumerated:** December 6, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 084359-23 (New Hampshire)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 116 LANGLEY PKWY, Concord, NH 03301-7521
- **Phone:** (603) 228-7211
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Collaborative Anesthesia Partners (NPI 1023522455, Farmington, NH); Icon Anesthesia Services Of New England LLC (NPI 1629583323, Middleton, MA); University Of Maryland Medical Center (NPI 1760572986, Baltimore, MD); Anesthesia Company, LLC (NPI 1871548156, Annapolis, MD); Capital Anesthesia Partners, LLC (NPI 1265715692, Chevy Chase, MD); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** December 30, 2023
- **Other identifiers:** Medicaid 409194900 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1205995529) · Data from the CMS NPPES public registry.