Mark Sullivan, PA-C
NPI 1225075328 · Surgical Physician Assistant · Portsmouth, NH
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Sullivan, PA-C is a Surgical Physician Assistant provider in Portsmouth, NH (NPI 1225075328).
Provider details
- NPI number
- 1225075328
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- PA 880 (ME)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
40 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 29 | $65 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $108 |
Typical Medicare-allowed amounts for these services range $65–$108 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$308 across 6 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
Additional practice locations (1)
- 333 Borthwick AveSuite 402Portsmouth, NH 03801-7128Phone: (603) 559-4111Fax: (603) 559-4110
Registry dates
- Enumerated
- 2006-05-31
- Last updated
- 2023-10-04
- Certified
- 2021-08-16
Frequently asked questions
- What is Mark Sullivan's NPI number?
- Mark Sullivan's National Provider Identifier (NPI) is 1225075328, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Sullivan's specialty?
- Mark Sullivan is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Sullivan located?
- Mark Sullivan's practice location on file with NPPES is 333 Borthwick Avenue, Portsmouth, NH 03801.
- What is Mark Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Mark Sullivan is (603) 559-4111.
- Does Mark Sullivan accept Medicare?
- Mark Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Sullivan's NPI active?
- Yes — Mark Sullivan's NPI (1225075328) is active in the NPPES registry as of the last update on 2023-10-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.