Jennifer Mulligan, MD
Jennifer Mulligan, MD is an Obesity Medicine (Family Medicine) Physician in Boston, MA, registered under NPI 1700347242. This provider registers 5 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 55 FRUIT ST, Boston, MA 02114. 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 |
|---|---|---|
| 334136 | NY | Obesity Medicine (Family Medicine)… primary |
| 1015157 | MA | Endocrinology, Diabetes & Metabolism… |
| 125.074597 | IL | Family Medicine Physician |
| 80087 | CT | Obesity Medicine (Preventive Medicine)… |
Licences are recorded in 4 states: NY, MA, IL, CT. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Endocrinology
- PAC ID
- 6406215508
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Massachusetts | I20230707001780 | Practitioner - Endocrinology |
| New York | I20260212000172 | Practitioner - Family Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Endocrinology. There are 2 separate enrolment records across 2 states (MA, NY). 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.
Licensed in 4 states
This provider holds licences in 4 states: Connecticut, Illinois, Massachusetts and New York. The practice address on file is in Boston, MA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 80087
- Specialty
- Obesity Medicine (Preventive Medicine)…
- Licence
- 1015157
- Specialty
- Endocrinology, Diabetes & Metabolism…
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Obesity Medicine covers
A physician who specializes in the treatment of obesity demonstrates competency in and a thorough understanding of the treatment of obesity and the genetic, biologic, environmental, social, and behavioral factors that contribute to obesity. The obesity medicine physician employs therapeutic interventions including diet, physical activity, behavioral change, and pharmacotherapy. The obesity medicine physician utilizes a comprehensive approach, and may include additional resources such as dietitians, exercise physiologists, mental health professionals and bariatric surgeons as indicated to achieve optimal results. Additionally, the obesity medicine physician maintains competency in providing pre- peri- and post-surgical care of bariatric surgery patients, promotes the prevention of obesity, and advocates for those who suffer from obesity. NUCC Health Care Provider Taxonomy, code 207QB0002X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207QB0002X | Obesity Medicine (Family Medicine) Physician Obesity Medicine | 334136 | NY | primary |
| 207RE0101X | Endocrinology, Diabetes & Metabolism Physician Endocrinology, Diabetes & Metabolism | 1015157 | MA | |
| 207Q00000X | Family Medicine Physician | 125.074597 | IL | |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — | |
| 2083B0002X | Obesity Medicine (Preventive Medicine) Physician Obesity Medicine | 80087 | CT |
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 | 1700347242 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 27, 2019 |
| Last updated | Jan 27, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
55 FRUIT ST Boston, MA 02114 (617) 726-2000 |
| Mailing address |
50 STANIFORD ST STE 430 Boston, MA 02114 |
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 | 7 | 0 | 0 | 3 | 4 | 7 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 0 | 0 | 6 | 4 | 5 | 2 | 8 |
Sum = 58 · next multiple of 10 = 60 · check digit = 2 · actual last digit = 2
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.