MS. GILLIAN L SOWDEN MD
NPI 1720387202
Psychiatry & Neurology - Psychiatry in Lebanon, NH
About Ms. Gillian L Sowden Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. GILLIAN L SOWDEN MD (NPI 1720387202) is an individual psychiatry provider in Lebanon, New Hampshire, licensed in New Hampshire (17807) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS, is affiliated with Mary Hitchcock Memorial Hospital, and is a graduate of Harvard Medical School (2011).
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
Ms. Gillian L Sowden 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 Gillian Sowden reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
Lebanon, NH 03756
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mary Hitchcock Memorial Hospital
Acute Care Hospitals · Lebanon, NHCheshire Medical Center
Acute Care Hospitals · Keene, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03756 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
LEBANON, NH 03756
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 Gillian Sowden's NPI number?
The NPI number for Gillian Sowden is 1720387202. It was assigned to this individual provider in the NPPES registry on March 23, 2011.
Where is Gillian Sowden located?
Gillian Sowden practices at 1 Medical Center Dr Dhmc, Department Of Psychiatry, Lebanon, NH 03756. The listed phone number is (603) 650-5000.
What is Gillian Sowden's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Gillian Sowden enrolled in Medicare?
Yes. Gillian Sowden 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 Gillian Sowden's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gillian Sowden reassigns Medicare benefits to 2 organizations: Dartmouth-Hitchcock Clinic (Lebanon, NH) and Mary Hitchcock Memorial Hospital (Lebanon, NH). 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 Gillian Sowden's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gillian Sowden accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Gillian Sowden 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 Gillian Sowden affiliated with any hospitals?
According to CMS data, Gillian Sowden is affiliated with Mary Hitchcock Memorial Hospital and Cheshire Medical Center.
When was this NPI record last updated?
The NPPES record for Gillian Sowden was last updated on July 1, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Ms. Gillian L Sowden, MD · NPI 1720387202
Psychiatry physician in Lebanon, New Hampshire. Individual provider, active in the CMS NPPES registry since March 23, 2011.
## Identity
- **NPI:** 1720387202 (Entity type: Individual)
- **Enumerated:** March 23, 2011
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 17807 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 MEDICAL CENTER DR, DHMC, DEPARTMENT OF PSYCHIATRY, Lebanon, NH 03756-1000
- **Phone:** (603) 650-5000
## 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): Dartmouth-Hitchcock Clinic (NPI 1548210198, Lebanon, NH); Mary Hitchcock Memorial Hospital (NPI 1023092053, Lebanon, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2011
## Record status
- **NPPES last updated:** July 1, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1720387202) · Data from the CMS NPPES public registry.