Edward Marshall, DPT, ECS, OCS, R.NCS
Edward Marshall, DPT, ECS, OCS, R.NCS is a Clinical Electrophysiology Physical Therapist in Mount Airy, MD, registered under NPI 1639106677. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 6091 TOURSOME DR, Mount Airy, MD 21771. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 17821-54217 | MD | Clinical Electrophysiology Physical… primary |
| 17821 | MD | Orthopedic Physical Therapist |
This provider holds licence 17821-54217 issued in MD. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Physical Therapist In Private Practice
- PAC ID
- 8820005051
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Maryland | I20060314000286 | Practitioner - Physical Therapist In Private Practice |
| District of Columbia | I20060505000806 | Practitioner - Physical Therapist In Private Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Physical Therapist In Private Practice. There are 2 separate enrolment records across 2 states (MD, DC). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Electrophysiology, Clinical covers
A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Clinical Electrophysiologic Physical Therapy, who has demonstrated specialized knowledge and skill in electrophysiologic examinations and evaluations and encompasses both the professional and technical components of the observation, recording, analysis, and interpretation of bioelectric muscle and nerve potentials, detected by means of surface or needle electrodes, for the purpose of evaluating the integrity of the neuromuscular system. Electrophysiologic evaluations include, but are not limited to, electrodiagnostic testing, which includes clinical needle electromyography, motor and sensory nerve conduction studies, and other evoked potential procedures. NUCC Health Care Provider Taxonomy, code 2251E1300X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2251E1300X | Clinical Electrophysiology Physical Therapist Electrophysiology, Clinical | 17821-54217 | MD | primary |
| 2251X0800X | Orthopedic Physical Therapist Orthopedic | 17821 | MD |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1639106677 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 26, 2006 |
| Last updated | Jan 31, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | DPT, ECS, OCS, R.NCS |
| Practice address |
6091 TOURSOME DR Mount Airy, MD 21771 (301) 252-5380 Fax (301) 829-3211 |
| Other identifiers |
401298400
· Medicaid (MD) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 6 | 3 | 9 | 1 | 0 | 6 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 6 | 9 | 2 | 0 | 3 | 6 | 5 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.