Sonja Nelson, M.D.
NPI 1598729675 · Obstetrics & Gynecology Physician · Portsmouth, NH
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sonja Nelson, M.D. is a Obstetrics & Gynecology Physician provider in Portsmouth, NH (NPI 1598729675).
Provider details
- NPI number
- 1598729675
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 10472 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
554 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 308 | $90 |
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 100 | $38 |
| Screening Papanicolaou Smear; Obtaining, Preparing and Conveyance of Cervical Or Vaginal Smear to LaboratoryQ0091 | 57 | $44 |
| Insertion of Lower Leg Neurostimulator Electrode64566 | 47 | $117 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 22 | $56 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 114 | 50 |
| Estradiolbrand: Yuvafem | 77 | 24 |
| Clobetasol Propionate | 40 | 28 |
| Progesterone, Micronizedbrand: Progesterone | 32 | — |
| Estradiolbrand: Estradiol (twice Weekly) | 26 | — |
| Estradiolbrand: Imvexxy | 24 | — |
| Valacyclovir Hclbrand: Valacyclovir | 24 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$94 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-14
- Last updated
- 2012-08-16
Frequently asked questions
- What is Sonja Nelson's NPI number?
- Sonja Nelson's National Provider Identifier (NPI) is 1598729675, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonja Nelson's specialty?
- Sonja Nelson is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Sonja Nelson located?
- Sonja Nelson's practice location on file with NPPES is 875 Greenland Rd, Portsmouth, NH 03801-4164.
- What is Sonja Nelson's phone number?
- The practice phone number listed in the NPPES registry for Sonja Nelson is (603) 436-1128.
- Does Sonja Nelson accept Medicare?
- Sonja Nelson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sonja Nelson's NPI active?
- Yes — Sonja Nelson's NPI (1598729675) is active in the NPPES registry as of the last update on 2012-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.