Doctor profile · Federal record
Dr. Janet Lo, MD
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Boston, MA
- NPI 1639290083
- Accepts Medicare
- 26 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
Massachusetts General Hospital, 55 Fruit Street
Boston, MA 02114
(617) 724-9109
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- November 9, 2012
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- Massachusetts #L-221992
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639290083. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
116
Distinct HCPCS
4
Medicare allowed
$20,690
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 58 | 46 | $193 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 31 | 26 | $140 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 14 | 14 | $225 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 13 | 13 | $153 |
In context: peer comparison
Among 97 peers in this city , average services per provider: 116. This provider delivers 1.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
396
Patients
78
Total drug cost
$186,099
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Praluent Pen (Alirocumab) | Brand | 100 | 25 | $110,818 |
| Levothyroxine Sodium | Generic | 49 | 15 | $1,121 |
| Ezetimibe | Generic | 36 | 16 | $2,825 |
| Repatha Sureclick (Evolocumab) | Brand | 35 | 0 | $43,035 |
| Atorvastatin Calcium | Generic | 29 | 11 | $993 |
| Rosuvastatin Calcium | Generic | 29 | 11 | $1,269 |
| Livalo (Pitavastatin Calcium) | Brand | 21 | 0 | $17,985 |
| Prednisone | Generic | 21 | 0 | $598 |
| Testosterone | Generic | 21 | 0 | $3,106 |
| Metformin Hcl | Generic | 16 | 0 | $198 |
Hospital affiliations
Frequently asked questions
What is Dr. Janet Lo's medical specialty?
Dr. Janet Lo practices Endocrinology, Diabetes & Metabolism Physician in Boston, MA.
Where does Dr. Janet Lo practice?
Dr. Janet Lo practices at Massachusetts General Hospital, Boston, MA 02114. Office phone: 6177249109.
What is Dr. Janet Lo's NPI?
Dr. Janet Lo's National Provider Identifier (NPI) is 1639290083, issued by NPPES.
Does Dr. Janet Lo accept Medicare assignment?
Yes. Dr. Janet Lo accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Janet Lo commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.