Mark Thurlow, LCSW
Mark Thurlow, LCSW is a provider specialising in Clinical Social Worker in Portland, ME, registered under NPI 1003257825. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Portland, based on OpenStreetMap data collected Sep 14, 2026. Parking is available about 0.31 mi away at USM Surrenden Street Parking Garage. There is EV charging 150 ft from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 861 ft away, served by BEDFORD & FOREST (USM).
Getting here and what is nearby
Parking 88 ft ~1 min
EV charging Tesla Supercharger 150 ft ~1 min
Parking 355 ft ~2 min
Grocery Hannaford 543 ft ~3 min
Transit USM/Forest Avenue (NB) 742 ft ~3 min
Transit USM/Forest Avenue (SB) 790 ft ~3 min
Transit BEDFORD & FOREST (USM) 861 ft ~4 min
Restaurant Leonardo's Pizza 0.25 mi ~6 min
Restaurant Crown Fried Chicken 0.27 mi ~6 min
Restaurant Stavros Pizzeria & Deli 0.29 mi ~6 min
Parking USM Surrenden Street Parking Garage 0.31 mi ~7 min
Grocery Trader Joe's 0.34 mi ~7 min
87 Marginal Way, Portland 04101
Mo-Su 08:00-21:00
Gas station Forest Avenue Mobil 0.51 mi ~11 min
518 Forest Avenue, Portland 04101
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| MC14221 | ME | Clinical Social Worker |
| LC15393 | ME | Clinical Social Worker primary |
This provider holds licence MC14221 issued in ME. 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 - Clinical Social Worker
- PAC ID
- 4183923600
- Enrollment ID
- I20160504000855
Medicare enrolment is recorded as approved under the provider type Practitioner - Clinical Social Worker. 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 Clinical covers
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances. NUCC Health Care Provider Taxonomy, code 1041C0700X
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 | |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker Clinical | MC14221 | ME | |
| 1041C0700X | Clinical Social Worker Clinical | LC15393 | ME | primary |
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 | 1003257825 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 9, 2013 |
| Last updated | Jun 17, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | LCSW |
| Practice address |
53 BAXTER BLVD STE 3 Portland, ME 04101 (603) 883-0005 |
| Mailing address |
21 NORTH RD Winn, ME 04495 |
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 | 0 | 0 | 3 | 2 | 5 | 7 | 8 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 5 | 5 | 8 | 4 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
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.