John Farrar, MD
John Farrar, MD is a Pain Medicine (Psychiatry & Neurology) Physician in Philadelphia, PA, registered under NPI 1427080571. 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 3400 CIVIC CENTER BLVD. PENN MEDICINE, Philadelphia, PA 19104. 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 |
|---|---|---|
| MD044835L | PA | Pain Medicine (Psychiatry & Neurology)… primary |
| MD044835L | PA | Neurology Physician |
This provider holds licence MD044835L issued in PA. 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 - Neurology
- PAC ID
- 5597891119
- Enrollment ID
- I20100407000137
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. 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 Pain Medicine covers
A neurologist, child neurologists or psychiatrist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists. NUCC Health Care Provider Taxonomy, code 2084P2900X
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 | |
|---|---|---|---|---|
| 2084P2900X | Pain Medicine (Psychiatry & Neurology) Physician Pain Medicine | MD044835L | PA | primary |
| 2084N0400X | Neurology Physician Neurology | MD044835L | PA |
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 | 1427080571 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 7, 2006 |
| Last updated | Apr 3, 2012 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
3400 CIVIC CENTER BLVD. PENN MEDICINE Philadelphia, PA 19104 (215) 349-8310 Fax (215) 662-2739 |
| Mailing address |
423 GUARDIAN DR 816 BLOCKLEY Philadelphia, PA 19104 |
| Other identifiers |
001276130001
· Medicaid (PA) |
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 | 4 | 2 | 7 | 0 | 8 | 0 | 5 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 4 | 7 | 0 | 8 | 0 | 5 | 5 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.