Doctor profile · Federal record
Dr. Karen Blumenthal, MD
Internal Medicine Physician (CMS: Internal Medicine) · Boston, MA
- NPI 1922362482
- Accepts Medicare
- 14 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
Massachusetts General Hospital, 55 Fruit St.
Boston, MA 02114
(617) 726-2865
Credentials & registration
- NPI registered
- June 2012 — 14 yrs on file
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Massachusetts #L-251289
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1922362482. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
296
Distinct HCPCS
8
Medicare allowed
$23,509
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36415 |
Insertion of needle into vein for collection of blood sample | 76 | 49 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 54 | 40 | $140 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 46 | 46 | $70 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 43 | 41 | $104 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 30 | 30 | $142 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 22 | 19 | $96 | |
G0008 |
Administration of influenza virus vaccine | 14 | 14 | $34 | |
90662 |
Influenza vaccine split virus, preservative free | 11 | 11 | $72 |
In context: peer comparison
Among 547 peers in this city , average services per provider: 81. This provider delivers 3.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
406
Patients
89
Total drug cost
$23,997
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 88 | 36 | $1,535 |
| Omeprazole | Generic | 51 | 16 | $923 |
| Lisinopril | Generic | 42 | 13 | $377 |
| Levothyroxine Sodium | Generic | 34 | 13 | $737 |
| Hydrochlorothiazide | Generic | 27 | 0 | $95 |
| Losartan Potassium | Generic | 24 | 0 | $323 |
| Metformin Hcl | Generic | 23 | 0 | $312 |
| Amlodipine Besylate | Generic | 21 | 11 | $196 |
| Metoprolol Succinate | Generic | 19 | 0 | $307 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 14 | 0 | $643 |
Hospital affiliations
Frequently asked questions
What is Dr. Karen Blumenthal's medical specialty?
Dr. Karen Blumenthal practices Internal Medicine Physician in Boston, MA.
Where does Dr. Karen Blumenthal practice?
Dr. Karen Blumenthal practices at Massachusetts General Hospital, Boston, MA 02114. Office phone: 6177262865.
What is Dr. Karen Blumenthal's NPI?
Dr. Karen Blumenthal's National Provider Identifier (NPI) is 1922362482, issued by NPPES.
Does Dr. Karen Blumenthal accept Medicare assignment?
Yes. Dr. Karen Blumenthal accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karen Blumenthal commonly perform?
Top Medicare-reported procedures in 2023: Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.