Doctor profile · Federal record
Dr. Katherine Johnston, M.D., M.A., M.Sc.
Internal Medicine Physician · Boston, MA
- NPI 1164469763
- 20 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
165 Cambridge St Ste 501
Boston, MA 021142759
(617) 726-4900
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- July 7, 2025
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Massachusetts #226586
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164469763. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
525
Distinct HCPCS
10
Medicare allowed
$67,732
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 211 | 87 | $194 | |
36415 |
Insertion of needle into vein for collection of blood sample | 108 | 79 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 59 | 49 | $141 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 45 | 45 | $142 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 18 | 18 | $281 | |
G0009 |
Administration of pneumococcal vaccine | 18 | 18 | $34 | |
G0438 |
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit | 18 | 18 | $180 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 15 | 11 | $16 | |
90662 |
Influenza vaccine split virus, preservative free | 11 | 11 | $72 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 11 | 11 | $91 |
In context: peer comparison
Among 547 peers in this city , average services per provider: 81. This provider delivers 6.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
838
Patients
262
Total drug cost
$94,779
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 156 | 54 | $4,438 |
| Amlodipine Besylate | Generic | 86 | 29 | $849 |
| Levothyroxine Sodium | Generic | 82 | 25 | $1,861 |
| Lisinopril | Generic | 77 | 28 | $765 |
| Ozempic (Semaglutide) | Brand | 53 | 0 | $73,115 |
| Metoprolol Succinate | Generic | 52 | 14 | $1,176 |
| Losartan Potassium | Generic | 50 | 16 | $838 |
| Estradiol | Generic | 41 | 24 | $5,622 |
| Valacyclovir (Valacyclovir Hcl) | Brand | 39 | 15 | $1,058 |
| Omeprazole | Generic | 36 | 14 | $1,289 |
Frequently asked questions
What is Dr. Katherine Johnston's medical specialty?
Dr. Katherine Johnston practices Internal Medicine Physician in Boston, MA.
Where does Dr. Katherine Johnston practice?
Dr. Katherine Johnston practices at 165 Cambridge St Ste 501, Boston, MA 021142759. Office phone: 6177264900.
What is Dr. Katherine Johnston's NPI?
Dr. Katherine Johnston's National Provider Identifier (NPI) is 1164469763, issued by NPPES.
What procedures does Dr. Katherine Johnston commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.