Mark A. Lapp, MD
NPI 1881664977ActiveIndividual· Orthopaedic Surgery, Orthopaedic Surgery of the Spine· North Chelmsford, MA
Orthopaedic Surgery, Orthopaedic Surgery of the Spine (MD) in North Chelmsford, Massachusetts, trained at State University of New York at Stony Brook, School of Medicine (class of 1993). 431 Medicare patients in 2024, $294,844 paid; all of their 105 Part D prescriptions were generic. Carlsmed, Inc. was the largest of 2 companies reporting payments in 2025, $4,336 in all, mostly consulting fees.
Overview
| NPI | 1881664977 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 23, 2006 |
| Last updated in NPPES | Feb 13, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine Primary | 207XS0117X | 160583 | MA |
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine | 207XS0117X | 12168 | NH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (MA); Practitioner - Orthopedic Surgery (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 431 |
|---|---|
| Services billed | 7,109 across 69 procedure codes |
| Paid by Medicare | $294,844 |
Part D prescriptions in 2024
| Prescriptions (claims) | 105 · 108 30-day fills |
|---|---|
| Patients | 78 |
| Total drug cost | $912.37 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | State University of New York at Stony Brook, School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Orthopedic Surgery |
| Telehealth | Offers telehealth |
Medical group
- Orthopaedic Surgical Associates of Lowell, P.C.North Chelmsford, MA · 43 clinicians
Hospital affiliations
- Emerson Hospital -W Concord, MA
- Lowell General HospitalLowell, MA
Other facilities
- Tufts Medicine Care at HomeHome health agency · Lowell, MA
- Northeast Rehabilitation HospitalInpatient rehabilitation facility · Salem, NH
Industry payments (Open Payments)
- 2025$4,336 · 9 payments from 2 companies
- 2024$8,535 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Carlsmed, Inc. | $3,855 | 4 |
| Medical Device Business Services, Inc. | $480.39 | 5 |
What the 2025 payments were for
- Consulting Fee$2,450 · 2 payments
- Travel and Lodging$1,722 · 3 payments
- Food and Beverage$163.80 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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