Mabi Singh, DMD
Mabi Singh, DMD is a provider specialising in Oral Medicine Dentistry in Lawrence, MA, registered under NPI 1639367634. 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 100 AMESBURY ST #203, Lawrence, MA 01840. 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 |
|---|---|---|
| DN21940 | MA | Oral Medicine Dentistry primary |
| 21940 | MA | Dentist |
This provider holds licence DN21940 issued in MA. 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 - Oral Surgery
- PAC ID
- 1153483763
- Enrollment ID
- I20081216000310
Medicare enrolment is recorded as approved under the provider type Practitioner - Oral Surgery. 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 Oral Medicine covers
Oral Medicine is the specialty of dentistry responsible for the oral health care of medically complex patients and for the diagnosis and management of medically related diseases, disorders and conditions affecting the oral and maxillofacial region. Oral Medicine specialists have training and expertise in the diagnosis and management of oral and mucosal diseases, medical management of maxillofacial pathologies from hematology and oncology, organ transplant services, autoimmune disorders, including acute and chronic pain conditions of oral & maxillofacial region. Oral Medicine specialists co-manage oral and maxillofacial conditions and diseases in collaboration with medical specialists and other dentists in hospitals and outpatient medical clinics, particularly in the management of patients with complex medical conditions requiring multidisciplinary healthcare intervention. NUCC Health Care Provider Taxonomy, code 125Q00000X
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 | |
|---|---|---|---|---|
| 125Q00000X | Oral Medicine Dentistry Oral Medicine | DN21940 | MA | primary |
| 122300000X | Dentist | 21940 | MA |
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 | 1639367634 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 4, 2007 |
| Last updated | Feb 25, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | DMD |
| Practice address |
100 AMESBURY ST #203 Lawrence, MA 01840 (978) 686-8500 |
| Other identifiers |
1301071
· Other (MA) |
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 | 3 | 6 | 7 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 6 | 9 | 6 | 6 | 5 | 6 | 6 |
Sum = 76 · next multiple of 10 = 80 · check digit = 4 · actual last digit = 4
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.