Mark Windt, M.D.
NPI 1689625600 · Allergy & Immunology Physician · North Hampton, NH
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Windt, M.D. is a Allergy & Immunology Physician provider in North Hampton, NH (NPI 1689625600).
Provider details
- NPI number
- 1689625600
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7208 (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
5,304 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 1,650 | $4 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 892 | $8 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 495 | $15 |
| Test to Measure Expiratory Airflow and Volume94010 | 411 | $27 |
| Professional Services for Outpatient Pulmonary Rehabilitation With Continuous Monitoring of Blood Oxygen, Per Session94626 | 302 | $81 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 227 | $179 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 144 | 41 |
| Fluticasone Propionate | 63 | 27 |
| Famotidine | 42 | 19 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 41 | — |
| Omeprazole | 33 | — |
| Mometasone/Formoterolbrand: Dulera | 22 | — |
| Ipratropium Bromide | 21 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$159 across 8 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
- 2006-05-15
- Last updated
- 2007-07-09
Frequently asked questions
- What is Mark Windt's NPI number?
- Mark Windt's National Provider Identifier (NPI) is 1689625600, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Windt's specialty?
- Mark Windt is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Windt located?
- Mark Windt's practice location on file with NPPES is 65 Lafayette Rd, North Hampton, NH 03862-2480.
- What is Mark Windt's phone number?
- The practice phone number listed in the NPPES registry for Mark Windt is (603) 964-3392.
- Does Mark Windt accept Medicare?
- Mark Windt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Windt's NPI active?
- Yes — Mark Windt's NPI (1689625600) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.