DR. NATHANIEL THOMAS MORIARTY MD
NPI 1649775552
Anesthesiology in Indianapolis, IN
About Dr. Nathaniel Thomas Moriarty Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHANIEL THOMAS MORIARTY MD (NPI 1649775552) is an individual anesthesiology provider in Indianapolis, Indiana, licensed in Massachusetts (292883) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Baystate Wing Hospital, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Dr. Nathaniel Thomas Moriarty 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 Nathaniel Moriarty reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 clinicians in this Medicare group
Springfield, MA 01118
- Reassigned Medicare billing, Massachusetts enrollment
- 144 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baystate Wing Hospital
Acute Care Hospitals · Palmer, MABaystate Noble Hospital
Acute Care Hospitals · Westfield, MABaystate Medical Center
Acute Care Hospitals · Springfield, MAOther Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
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 Nathaniel Moriarty's NPI number?
The NPI number for Nathaniel Moriarty is 1649775552. It was assigned to this individual provider in the NPPES registry on March 24, 2018. The provider is also known as Dr. Nathan Thomas Moriarty MD.
Where is Nathaniel Moriarty located?
Nathaniel Moriarty practices at 1130 W. Michigan St Fesler Hall 204, Indianapolis, IN 46202. The listed phone number is (317) 274-4343.
What is Nathaniel Moriarty's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Nathaniel Moriarty enrolled in Medicare?
Yes. Nathaniel Moriarty 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 Nathaniel Moriarty's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Moriarty reassigns Medicare benefits to 2 organizations: Baystate Medical Practices, Inc (Springfield, MA) and Springfield Anesthesia Service, Inc. (Springfield, 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 Nathaniel Moriarty's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nathaniel Moriarty accept?
Health plans from Taro Health list Nathaniel Moriarty 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 Nathaniel Moriarty affiliated with any hospitals?
According to CMS data, Nathaniel Moriarty is affiliated with Baystate Wing Hospital, Baystate Noble Hospital and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Nathaniel Moriarty was last updated on June 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Nathaniel Thomas Moriarty, MD · NPI 1649775552
Anesthesiology physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since March 24, 2018.
## Identity
- **NPI:** 1649775552 (Entity type: Individual)
- **Enumerated:** March 24, 2018
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 292883 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1130 W. MICHIGAN ST, FESLER HALL 204, Indianapolis, IN 46202
- **Phone:** (317) 274-4343 · **Fax:** (317) 274-0256
## 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): Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA); Springfield Anesthesia Service, Inc. (NPI 1093768830, Springfield, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** June 22, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1649775552) · Data from the CMS NPPES public registry.