John Mulhern, LCSW-C
John Mulhern, LCSW-C is a provider specialising in Clinical Social Worker in Frederick, MD, registered under NPI 1003166679.
Getting there
Here is what surrounds this office in Frederick, based on OpenStreetMap data collected Sep 9, 2026. Parking is available about 0.30 mi away at Church Street Garage. There is EV charging 782 ft from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 828 ft away, served by Frederick MARC Station (Bus). A pharmacy sits 0.38 mi from the entrance (Whitesell Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.32 mi away.
Getting here and what is nearby
Hotel Beth house 420 ft ~2 min
226 East Church Street, 21701
Coffee Frederick Coffee Company & Cafe 535 ft ~3 min
Mo-Su 06:00-18:00
Transit Frederick Transit Center 810 ft ~4 min
EV charging ChargePoint 782 ft ~3 min
Transit Frederick MARC Station (Bus) 828 ft ~4 min
Parking East All Saints Garage 990 ft ~4 min
Restaurant Maxwell's 0.22 mi ~5 min
57 East Patrick Street, Frederick 21701
Mo-Sa 11:30-21:00; Su 11:30-19:00
Parking Carroll Creek Parking Deck 0.25 mi ~5 min
Restaurant The Wine Kitchen 0.25 mi ~6 min
50 Carroll Creek Way, 21701
Tu-Th 12:00-21:00; Fr-Sa 12:00-22:00; Su 11:00-21:00; Mo closed
Restaurant Jojo's Restaurant & Tap House 0.27 mi ~6 min
18 East Patrick Street, Frederick 21701
Coffee Cafe Nola 0.30 mi ~7 min
4 East Patrick Street, Frederick 21701
Mo 08:00-24:00; Tu 08:00-15:00; We-Sa 08:00-25:00; Su 08:00-24:00
Parking Church Street Garage 0.30 mi ~6 min
Coffee Starbucks 0.32 mi ~7 min
Convenience Toniq 0.37 mi ~8 min
89 South Market Street, Frederick 21701
Hotel Francis Scott Key Hotel 0.37 mi ~8 min
31 West Patrick Street, 21701
Pharmacy Whitesell Pharmacy 0.38 mi ~8 min
Convenience 7-Eleven 0.44 mi ~9 min
Convenience Joy Convenience 0.46 mi ~10 min
406 North Market Street, Frederick 21701
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 |
|---|---|---|
| 10823 | MD | Clinical Social Worker primary |
This provider holds licence 10823 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 - Clinical Social Worker
- PAC ID
- 9739440033
- Enrollment ID
- I20180301001412
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
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 | 1003166679 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 11, 2012 |
| Last updated | Sep 11, 2012 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | LCSW-C |
| Practice address |
309 E PATRICK ST Frederick, MD 21701 (301) 631-1304 Fax (301) 631-1384 |
| Mailing address |
228 E WASHINGTON ST Hagerstown, MD 21740 |
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 | 1 | 6 | 6 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 6 | 3 | 6 | 5 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.