MARCO LOI CRNA
NPI 1083970495
Nurse Anesthetist, Certified Registered in Waltham, MA
About Marco Loi Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARCO LOI CRNA (NPI 1083970495) is an individual nurse anesthetist, certified registered in Waltham, Massachusetts, licensed in Massachusetts (RN274270) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
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
Marco Loi 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 Marco Loi reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Winchester, MA 01890
- Reassigned Medicare billing, Massachusetts enrollment
- 105 clinicians in this Medicare group
Acton, MA 01720
- Reassigned Medicare billing, Massachusetts enrollment
- 125 clinicians in this Medicare group
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 246 clinicians in this Medicare group
Stoneham, MA 02180
- Reassigned Medicare billing, Massachusetts enrollment
- 65 clinicians in this Medicare group
Middleton, MA 01949
- Reassigned Medicare billing, Massachusetts and New Hampshire enrollments
- 98 clinicians in this Medicare group
Andover, MA 01810
- Reassigned Medicare billing, Massachusetts enrollment
- 14 clinicians in this Medicare group
Nashua, NH 03062
- Reassigned Medicare billing, New Hampshire enrollment
- 23 clinicians in this Medicare group
Manchester, NH 03103
- Reassigned Medicare billing, New Hampshire enrollment
- 278 clinicians in this Medicare group
Kamuela, HI 96743
- Reassigned Medicare billing, Hawaii enrollment
- 68 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 8
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02451 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALTHAM, MA 02451
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 Marco Loi's NPI number?
The NPI number for Marco Loi is 1083970495. It was assigned to this individual provider in the NPPES registry on April 10, 2012.
Where is Marco Loi located?
Marco Loi practices at 1440 Main St, Waltham, MA 02451. The listed phone number is (781) 891-9300.
What is Marco Loi's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Marco Loi enrolled in Medicare?
Yes. Marco Loi 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 Marco Loi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marco Loi reassigns Medicare benefits to 9 organizations: Winchester Anesthesia Associates, Inc (Winchester, MA), Gbaa Holdings, PLLC (Acton, MA), Pratt Anesthesiology Associates, Inc (Boston, MA), Dha Endoscopy LLC (Stoneham, MA), Icon Anesthesia Services Of New England LLC (Middleton, MA) 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 Marco Loi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marco Loi accept?
Health plans from WellSense Health Plan list Marco Loi 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.
When was this NPI record last updated?
The NPPES record for Marco Loi was last updated on January 23, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Marco Loi, CRNA · NPI 1083970495
Nurse Anesthetist, Certified Registered physician in Waltham, Massachusetts. Individual provider, active in the CMS NPPES registry since April 10, 2012.
## Identity
- **NPI:** 1083970495 (Entity type: Individual)
- **Enumerated:** April 10, 2012
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** RN274270 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1440 MAIN ST, Waltham, MA 02451-1631
- **Phone:** (781) 891-9300 · **Fax:** (781) 891-9305
## 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): Winchester Anesthesia Associates, Inc (NPI 1972626117, Winchester, MA); Gbaa Holdings, PLLC (NPI 1790299592, Acton, MA); Pratt Anesthesiology Associates, Inc (NPI 1326085390, Boston, MA); Dha Endoscopy LLC (NPI 1851921555, Stoneham, MA); Icon Anesthesia Services Of New England LLC (NPI 1629583323, Middleton, MA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** January 23, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1083970495) · Data from the CMS NPPES public registry.