ELIZABETH J WELCH MARSH MD
NPI 1619974680
Anesthesiology in Manchester, NH
About Elizabeth J Welch Marsh Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELIZABETH J WELCH MARSH MD (NPI 1619974680) is an individual anesthesiology provider in Manchester, New Hampshire, licensed in New Hampshire (12925) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Elizabeth J Welch Marsh 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
9Medicare enrollment records show Elizabeth Welch Marsh reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hampstead, NH 03841
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Nashua, NH 03060
- Reassigned Medicare billing, New Hampshire enrollment
- 132 clinicians in this Medicare group
Exeter, NH 03833
- Reassigned Medicare billing, New Hampshire enrollment
- 189 clinicians in this Medicare group
North Chelmsford, MA 01863
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Integrated Gastroenterology Consultants, P.C.
- 70 clinicians in this Medicare group
Keene, NH 03431
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1255818472 (Massachusetts)
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Northampton, MA 01060
- Reassigned Medicare billing, Massachusetts enrollment
- 539 clinicians in this Medicare group
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1194866210 (Massachusetts)
- 184 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 4
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.
Cooley Dickinson Hospital Inc,the
Acute Care Hospitals · Northampton, MAAnna Jaques Hospital
Acute Care Hospitals · Newburyport, MAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MANCHESTER, NH 03104
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 Elizabeth Welch Marsh's NPI number?
The NPI number for Elizabeth Welch Marsh is 1619974680. It was assigned to this individual provider in the NPPES registry on July 5, 2005.
Where is Elizabeth Welch Marsh located?
Elizabeth Welch Marsh practices at 100 Hitchcock Way, Manchester, NH 03104. The listed phone number is (603) 695-2500.
What is Elizabeth Welch Marsh's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Elizabeth Welch Marsh enrolled in Medicare?
Yes. Elizabeth Welch Marsh 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 Elizabeth Welch Marsh's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Welch Marsh reassigns Medicare benefits to 9 organizations: Mary Hitchcock Memorial Hospital (Hampstead, NH), North American Partners In Anesthesia New Hampshire LLP (Nashua, NH), Anesthesia Care Group PC (Exeter, NH), Integrated Gastroenterology Consultants, PC (North Chelmsford, MA), Dartmouth-Hitchcock Clinic (Keene, NH) 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 Elizabeth Welch Marsh's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Elizabeth Welch Marsh accept?
Health plans from Taro Health and WellSense Health Plan list Elizabeth Welch Marsh 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 Elizabeth Welch Marsh affiliated with any hospitals?
According to CMS data, Elizabeth Welch Marsh is affiliated with Cooley Dickinson Hospital Inc,the and Anna Jaques Hospital.
When was this NPI record last updated?
The NPPES record for Elizabeth Welch Marsh was last updated on August 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Elizabeth J Welch Marsh, MD · NPI 1619974680
Anesthesiology physician in Manchester, New Hampshire. Individual provider, active in the CMS NPPES registry since July 5, 2005.
## Identity
- **NPI:** 1619974680 (Entity type: Individual)
- **Enumerated:** July 5, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 12925 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 HITCHCOCK WAY, Manchester, NH 03104-4125
- **Phone:** (603) 695-2500
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Mary Hitchcock Memorial Hospital (NPI 1699584219, Hampstead, NH); North American Partners In Anesthesia New Hampshire LLP (NPI 1306838701, Nashua, NH); Anesthesia Care Group PC (NPI 1629074224, Exeter, NH); Integrated Gastroenterology Consultants, PC (NPI 1396075123, North Chelmsford, MA); Dartmouth-Hitchcock Clinic (NPI 1174176861, Keene, NH); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Vermont College Of Medicine, class of 2001
## Record status
- **NPPES last updated:** August 17, 2025
- **Other identifiers:** Medicaid 30205542 (NH)
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Source: [NPI Profile](https://npiprofile.com/npi/1619974680) · Data from the CMS NPPES public registry.