Sonja Blum, MD, PHD
Sonja Blum, MD, PHD is a Behavioral Neurology & Neuropsychiatry Physician in New York, NY, registered under NPI 1003073636. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in New York, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 0.39 mi away. There is EV charging 0.43 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 280 ft away, served by East 72nd Street & 1st Avenue. A pharmacy sits 0.22 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 549 ft away.
Getting here and what is nearby
Coffee Alex Cafe & Deli 138 ft ~1 min
Restaurant York Ave Pizza 134 ft ~1 min
434 East 72nd Street
Mo 10:00-20:00; Tu-Fr 10:00-21:00; Sa 11:00-21:00
Transit East 72nd Street & York Avenue 220 ft ~1 min
Transit York Avenue & East 72nd Street 248 ft ~1 min
Transit East 72nd Street & 1st Avenue 280 ft ~2 min
Restaurant Chopt 330 ft ~2 min
1327 York Avenue, 10021
Mo-Th 10:30-21:00, Fr 10:30-20:00, Sa-Su 11:00-19:00
Pharmacy Duane Reade 391 ft ~2 min
1352 1st Avenue, New York 10021
00:00-24:00 open "Store" || Mo-Fr 08:00-13:30, 14:00-22:00; Sa 09:00-13:30, 14:00-18:00; Su 10:00-13:30, 14:00-18:00 open "Pharmacy"
Restaurant Dos Torros 353 ft ~2 min
1327 York Avenue, 10021
Mo-Fr 07:30-21:00, Sa-Su 08:00-21:00
Convenience York Grill & Juice Bar 437 ft ~2 min
Coffee Coffee Inn 477 ft ~2 min
Convenience Green Gourmet 474 ft ~2 min
Convenience Grace Convenience 487 ft ~2 min
Hotel Ronald McDonald House New York 451 ft ~2 min
405 East 73rd Street
Coffee B&B Bagels 549 ft ~3 min
1370 1st Avenue, 10021
Mo-Fr 06:00-18:00; Sa, Su 06:00-17:00
Grocery Morton Williams 504 ft ~2 min
1331 1st Avenue, New York 10021
PH,Mo-Su 00:00-23:59
Grocery A Matter of Health 519 ft ~2 min
Pharmacy CVS Pharmacy 0.21 mi ~5 min
1396 2nd Avenue, New York 10021
Mo-Fr 08:00-13:30, 14:00-22:00; Sa, Su 08:00-20:00 open "Pharmacy" || 24/7 open "Store"
Pharmacy Walgreens 0.22 mi ~5 min
Mo-Fr 10:00-19:00; Sa 09:00-18:00 open "Pharmacy"|| 07:00-22:00 open "Store"
Parking Surrey Garage 0.28 mi ~6 min
439 East 77th Street, 10075
Grocery Gristedes 0.28 mi ~6 min
Parking 0.32 mi ~7 min
403 East 65th Street, New York 10065
Parking 0.39 mi ~8 min
337 East 64th Street, New York 10065
EV charging ChargePoint 0.43 mi ~9 min
Hotel The Gardens Sonesta ES Suites 0.47 mi ~10 min
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 |
|---|---|---|
| 248370 | NY | General Practice Physician |
| 248370 | NY | Behavioral Neurology & Neuropsychiatry… primary |
This provider holds licence 248370 issued in NY. 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
- 8224212006
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| New York | I20110404000445 | Practitioner - Neurology |
| Wisconsin | I20161004001444 | Practitioner - Neurology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 2 separate enrolment records across 2 states (NY, WI). 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 Behavioral Neurology & Neuropsychiatry covers
Behavioral Neurology & Neuropsychiatry is a medical subspecialty involving the diagnosis and treatment of neurologically based behavioral issues. NUCC Health Care Provider Taxonomy, code 2084B0040X
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 | |
|---|---|---|---|---|
| 208D00000X | General Practice Physician | 248370 | NY | |
| 2084B0040X | Behavioral Neurology & Neuropsychiatry Physician Behavioral Neurology & Neuropsychiatry | 248370 | NY | 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 | 1003073636 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 21, 2008 |
| Last updated | Apr 30, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD, PHD |
| Practice address |
428 E 72ND ST OFC 500 New York, NY 10021 (212) 746-2441 |
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 | 0 | 7 | 3 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 7 | 6 | 6 | 6 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.