John McMahon
DOExplore health coverage in NH
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A simple overview of this provider's main area of care.
Care Category
Other Health Services
Provider Type
Internal Medicine
Primary Specialty
Sports Medicine
Registry identifiers, classification, and the primary practice record.
- NPI Number
- 1821258062
- Provider Type
- Individual Practitioner
- Gender
- Male
- NPI Record Status
- Active NPI record
- Credential
- DO
- Primary Specialty
- Internal Medicine - Sports Medicine
- Specialty Registry Code
- 207RS0010X
- Other Classifications
- Internal Medicine - Sports Medicine
- License Number
- 16235
- Primary Practice Address
- 1900 Lafayette RD, Suite a
- City, State ZIP
- Portsmouth, NH 03801
- Practice Phone
- (603) 431-1121
- Fax
- (603) 431-9147
- Record Updated
- July 15, 2026
- Source
- NPPES NPI Registry
Public registry data is a starting point. Confirm these details directly before a visit.
- Whether the provider is accepting new patients
- Your exact plan and network participation
- Current hours, telehealth, and accessibility
- Referral or prior-authorization requirements
John McMahon is listed in the National Provider Identifier registry as a internal medicine - sports medicine provider in Portsmouth, NH.
The public record lists a practice address at 1900 Lafayette RD, Suite a, Portsmouth, NH 03801. Call (603) 431-1121 to confirm current scheduling details, or use the directions link above to locate the office.
If you plan to see this provider, confirm that the practice accepts your exact plan and participates in the applicable network before scheduling. Coverage details vary by plan, and our coverage flow can connect you with plan information in NH.
This public record was updated on July 15, 2026. Provider information can change between registry updates, so please confirm details directly with the practice before scheduling.
John McMahon
1900 Lafayette RD, Suite a, Portsmouth, NH 03801
General guidance about internal medicine - sports medicine care in Portsmouth, NH; it does not confirm services offered by this provider.
What a Internal Medicine - Sports Medicine provider does
Internal medicine providers, also called internists, specialize in the prevention, diagnosis, and treatment of diseases in adults. They are trained to handle both common and complex illnesses and often manage patients with multiple chronic conditions.
Common conditions treated
Internists commonly treat hypertension, type 2 diabetes, coronary artery disease, chronic obstructive pulmonary disease (COPD), thyroid disorders, kidney disease, and arthritis. They also coordinate cancer screenings and geriatric assessments.
Common reasons to schedule a visit
Patients see internists for annual physicals, management of chronic conditions such as diabetes, hypertension, and heart disease, second opinions, and coordination of care between specialists.
What to expect during a visit
Expect a thorough review of your medical history, current medications, and lifestyle. Your internist may order blood work, imaging, or other diagnostic tests to support an accurate diagnosis and treatment plan.
Insurance coverage considerations
Medicare and most commercial insurance plans cover adult preventive visits and chronic care management. Verify network status before scheduling by using our quote tool.
How to choose the right internal medicine - sports medicine provider in Portsmouth
Choose an internist with experience managing your specific conditions, convenient hospital affiliations, and a willingness to coordinate with any specialists you may need. Board certification in internal medicine signals additional training and commitment to ongoing education.
Exploring coverage before you schedule? Compare options, then confirm this provider's participation directly with the plan and office. Get options in NH →
Insurance acceptance not listed
The public NPI registry does not include insurance acceptance data. Contact the office directly to ask if they accept your insurance plan. You can also explore coverage options in NH, then verify network participation directly.
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Common questions about John McMahon in Portsmouth, NH.
How do I make an appointment with John McMahon?
Call John McMahon directly at the Portsmouth office to ask about appointments.
Does John McMahon accept insurance?
Provider insurance information is not included in the public NPI registry data that powers this directory. Contact the office directly to ask whether they accept your specific insurance plan. You can also explore health coverage options in NH.
What are the office hours for John McMahon in Portsmouth?
Office hours for John McMahon in Portsmouth are not currently published. Call the practice directly to confirm hours before your visit.
Is parking available at John McMahon's Portsmouth location?
Parking and accessibility information is not included in the public NPI record. Call John McMahon in Portsmouth before visiting to ask about parking, entrances, elevators, and other accommodations.
Does John McMahon offer telehealth?
Telehealth availability is not listed in this public profile. Contact John McMahon to ask whether virtual visits are offered and whether telehealth is appropriate for your needs.
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Claim ProfileData is sourced from publicly available records. Public records do not confirm active license status, quality of care, insurance acceptance, or network participation. Please verify details directly with the provider before scheduling. Record updated July 15, 2026.