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- 1900 Lafayette Rd, Suite A, Portsmouth, NH 03801
About Dr. Mcmahon
John A. McMahon, DO practices sports medicine in Portsmouth, NH. John is a 2008 graduate of University of New England, College of Osteo Medicine. John is also listed as specializing in internal medicine. According to Medicare claims data, John cared for 1,725 Medicare patients across 46,268 services. The services billed most often include injection, methylprednisolone acetate, 1 mg, injection, triamcinolone acetonide, preservative-free, extended-release, microsphere formulation, 1 mg, and aspiration and/or injection of fluid large joint using ultrasound guidance. The provider's National Provider Identifier (NPI) is 1821258062.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (603) 431-1121
- Email not available
Practice Locations
1900 LAFAYETTE RD SUITE A
Portsmouth, NH 03801
Conditions Commonly Evaluated or Treated
Within Sports Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Bone
- Bone Bruise
- Stress fracture
Bone injuries
- Stress Fracture Of The Spine
Chest and torso
- Bruised Ribs
Elbow & Arm
Foot & Ankle
- Achilles Tendon Pain
- Chronic Ankle Instability
- Heel pain
- Torn Achilles tendon
- Turf toe
Foot and ankle
Hand & Wrist
Hand and wrist
Hip & Thigh
- Groin Strain
- Hip labral tear
- Lateral hip pain and trochanteric bursitis
- Muscle strain
- Snapping Hip Syndrome
- Sports Hernia
Joint injuries
- Dislocated Kneecap
Joint pain
- Hip osteoarthritis
- Osteoarthritis
- Water On The Knee
Knee
Lower Leg
- Pulled Calf Muscle
- Shin Splints
Muscle and tendon injuries
- Charley Horse In Thigh
- Hip Pain and Tightness
Nerve pain
Pediatric & Teen Sports
- Little League Elbow
- Osgood-Schlatter Disease
- Sever's Disease
Shoulder
- Bicep tendonitis
- Frozen shoulder
- Shoulder impingement
- Shoulder instability and dislocation
Shoulder injuries
- Clavicle pain
- Shoulder Labrum Tear
Spine & Back
Sports health
- Athlete Low Energy and Overtraining
Sprains and tears
- High Ankle Sprain
- PCL tear
- Torn LCL
Procedures & services
Most searched procedures
- Concussion protocol
- Joint injections
- PRP therapy
- Ultrasound-guided injections
Bracing and support
- Patellar Taping
Consultations
- Sports Injury Second Opinion
Diagnostics
- Compartment Pressure Testing
- Joint Ultrasound
Exams & Clearance
- Return-To-Play Clearance
- Sports physical
Injections
- Bursa injection
- Shoulder Cortisone Injection
Injections & Pain Relief
- Bursa Aspiration And Injection
- Joint injection or aspiration
- Knee Fluid Drainage
- Knee Joint Injection
- Nerve Hydrodissection
- Trigger Point Injections
Injury management
- Splinting and temporary casting
Pain management
- Knee Nerve Ablation
Performance & Assessment
- Injury Prevention Screening
- Lactate Threshold Testing
- Running Gait Analysis
- VO2 Max Testing
Performance and testing
- DEXA Body Composition Scan
- Professional Bike Fitting
- Resting Metabolic Rate Test
- Running Form Coaching
Recovery therapy
- Hyperbaric Oxygen For Sports Injury
- Whole Body Cryotherapy
Regenerative & Advanced Therapy
- Prolotherapy
- Shockwave Therapy
- Stem Cell Therapy For Joints
- Tenex Procedure
Regenerative medicine
- Stem Cell Injections For Joint Pain
Rehab & Recovery
- Active release technique
- Blood flow restriction therapy
- Cupping Therapy
- Dry needling
- Exercise Prescription
- Muscle Scraping
- Sports Physical Therapy
Rehabilitation
- Aquatic Therapy
- Dynamic Neuromuscular Stabilization
Support & Bracing
- Custom Knee Bracing
- Custom orthotics
- Custom Walking Boot Fitting
- Foot Casting
- Kinesio Taping
Procedures Most Often Billed to Medicare
46,268 services · 1,725 patients · 18 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid large joint using ultrasound guidance | Procedure | 20611 |
700 | More than most peers in Sports Medicine |
| Aspiration and/or injection of fluid from small joint using ultrasound guidance | Procedure | 20604 |
205 | More than most peers in Sports Medicine |
| Aspiration and/or injection of fluid from medium joint using ultrasound guidance | Procedure | 20606 |
64 | Too few peers to compare |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
33 | As often as other peers in Sports Medicine |
| Injection into tendon or ligament | Procedure | 20550 |
32 | As often as other peers in Sports Medicine |
| Injection of contrast for imaging of shoulder joint | Procedure | 23350 |
25 | Too few peers to compare |
| Injection of anesthetic and/or steroid drug into foot nerve | Procedure | 64455 |
21 | Too few peers to compare |
| Ultrasonic guidance for needle placement | Imaging | 76942 |
54 | More often than most peers in Sports Medicine |
| Limited ultrasound scan of joint or other extremity structure except blood vessels | Imaging | 76882 |
24 | As often as other peers in Sports Medicine |
| X-ray of knee, 3 views | Imaging | 73562 |
18 | As often as other peers in Sports Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 19 related providers in 3 groups
Trained at University of New England, College of Osteo Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2008 at University of New England, College of Osteo Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid large joint using ultrasound guidance 3
Providers in NH who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. McMahon?
Dr. McMahon is a sports medicine doctor in Portsmouth, NH. That is the designation recorded for this NPI in the federal registry, where it is listed as “Sports Medicine”.
NPI registry
What is Dr. McMahon's address?
Dr. McMahon is listed at 1900 Lafayette Rd Suite A, Portsmouth, NH 03801. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. McMahon?
The number on file is (603) 431-1121. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. McMahon's NPI number?
Dr. McMahon's National Provider Identifier is 1821258062. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. McMahon train?
Dr. McMahon attended University of New England, College of Osteo Medicine, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. McMahon been practicing?
Dr. McMahon has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. McMahon perform?
According to Medicare billing data, Dr. McMahon performs procedures including aspiration and/or injection of fluid large joint using ultrasound guidance, aspiration and/or injection of fluid from small joint using ultrasound guidance and aspiration and/or injection of fluid from medium joint using ultrasound guidance; reads or performs imaging such as ultrasonic guidance for needle placement and limited ultrasound scan of joint or other extremity structure except blood vessels, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. McMahon confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. McMahon. If this is you, claiming it is free.
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