Marissa Souther, MSN, APRN, FNP-C
NPI 1164986758 · Family Nurse Practitioner · Exeter, NH
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Souther, MSN, APRN, FNP-C is a Family Nurse Practitioner provider in Exeter, NH (NPI 1164986758).
Provider details
- NPI number
- 1164986758
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, APRN, FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 114306-23 (NH)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
21 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Hemoglobin A1c Level83036 | 21 | $10 |
Typical Medicare-allowed amounts for these services range $10–$10 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 116 | 41 |
| Lisinopril | 87 | 27 |
| Amlodipine Besylate | 86 | 22 |
| Metformin Hcl | 80 | 21 |
| Levothyroxine Sodium | 62 | 17 |
| Pravastatin Sodium | 47 | 12 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-01-28
- Last updated
- 2025-07-08
- Certified
- 2025-07-08
Frequently asked questions
- What is Marissa Souther's NPI number?
- Marissa Souther's National Provider Identifier (NPI) is 1164986758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Souther's specialty?
- Marissa Souther is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Souther located?
- Marissa Souther's practice location on file with NPPES is 21 Hampton Rd Bldg 3, Exeter, NH 03833-4854.
- What is Marissa Souther's phone number?
- The practice phone number listed in the NPPES registry for Marissa Souther is (603) 775-0000.
- Does Marissa Souther accept Medicare?
- Marissa Souther is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Souther's NPI active?
- Yes — Marissa Souther's NPI (1164986758) is active in the NPPES registry as of the last update on 2025-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.