Mark Ballentyne, MD
NPI 1669404661 · Family Medicine Physician · Portsmouth, NH
Mark Ballentyne, MD is a Family Medicine Physician provider in Portsmouth, NH (NPI 1669404661).
Provider details
- NPI number
- 1669404661
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 8856 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,641 across 23 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
- 2006-07-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Ballentyne's NPI number?
- Mark Ballentyne's National Provider Identifier (NPI) is 1669404661, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ballentyne's specialty?
- Mark Ballentyne is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ballentyne located?
- Mark Ballentyne's practice location on file with NPPES is 100 Griffin Road, Portsmouth, NH 03801.
- What is Mark Ballentyne's phone number?
- The practice phone number listed in the NPPES registry for Mark Ballentyne is (603) 431-8819.
- Is Mark Ballentyne's NPI active?
- Yes — Mark Ballentyne's NPI (1669404661) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.