Katherine Johnston, M.D., M.A., M.SC.
NPI 1164469763 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Johnston, M.D., M.A., M.SC. is a Internal Medicine Physician provider in Boston, MA (NPI 1164469763).
Provider details
- NPI number
- 1164469763
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.A., M.SC.
- Sex
- Female
- Sole proprietor
- No
- License
- 226586 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
436 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 134 | $196 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 92 | $17 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 73 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 57 | $141 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 54 | $139 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 150 | 49 |
| Amlodipine Besylate | 108 | 33 |
| Lisinopril | 73 | 21 |
| Levothyroxine Sodium | 69 | 21 |
| Estradiol | 46 | 22 |
| Valacyclovir Hclbrand: Valacyclovir | 43 | 11 |
| Metoprolol Succinate | 43 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-01
- Last updated
- 2025-07-07
- Certified
- 2025-07-07
Frequently asked questions
- What is Katherine Johnston's NPI number?
- Katherine Johnston's National Provider Identifier (NPI) is 1164469763, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Johnston's specialty?
- Katherine Johnston is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Johnston located?
- Katherine Johnston's practice location on file with NPPES is 165 Cambridge St Ste 501, Boston, MA 02114-2759.
- What is Katherine Johnston's phone number?
- The practice phone number listed in the NPPES registry for Katherine Johnston is (617) 726-4900.
- Does Katherine Johnston accept Medicare?
- Katherine Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Johnston's NPI active?
- Yes — Katherine Johnston's NPI (1164469763) is active in the NPPES registry as of the last update on 2025-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.