Mark A. Ballentyne, MD
Family Medicine Physician · Portsmouth, NH
Mark A. Ballentyne, MD is a family medicine physician with a practice address in Portsmouth, New Hampshire, and NPI 1669404661, issued on Jul 7, 2006. Check the license (New Hampshire 8856, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark A. Ballentyne
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 8856 NH
Self-reported in NPPES; status is on the state search - Practice location
- 100 Griffin Road, Portsmouth, NH 03801
- Phone
- (603) 431-8819
- Enumerated
- Jul 7, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (603) 427-2540
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 816 in New Hampshire → Look up another NPI →
Also registered at 100 Griffin Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark A. Ballentyne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 8856Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $2,641.41
23 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark A. Ballentyne among 816 family medicine physician records in New Hampshire
Mark A. Ballentyne, MD is one of 816 family medicine physician records with a practice address in New Hampshire. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 43% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 family medicine physician records list a practice address in Portsmouth
They are 36 of the 1,860 NPPES records with a practice address in Portsmouth, and 816 family medicine physician records in New Hampshire.
All 816 in New Hampshire → Every provider in Portsmouth → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Keenan Al-Hojerry, MDPortsmouth, NH 038011063468981
- David Gagnon, MDPortsmouth, NH 038011831145259
- Jennifer Koop, MDPortsmouth, NH 038011699769372
- George Kousaie, MDPortsmouth, NH 038011548263437
- Susan Krolewski, MDPortsmouth, NH 038011467406710
- Kenneth Lajoie, DOPortsmouth, NH 038011730142175
- M. Lauter, M.D.Portsmouth, NH 038011366544819
- Stephen Lutz, MDPortsmouth, NH 038011881640761
Common questions
What is Mark A. Ballentyne, MD's NPI number?
Mark A. Ballentyne, MD's National Provider Identifier (NPI) is 1669404661, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Ballentyne, MD located?
The NPPES record lists a practice address at 100 Griffin Road, Portsmouth, NH, 03801. Phone: (603) 431-8819. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Ballentyne, MD's license?
NPPES lists New Hampshire license number 8856, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.