Katharine Treadway, MD
NPI 1417944141 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katharine Treadway, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1417944141).
Provider details
- NPI number
- 1417944141
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- 47706 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Katharine Treadway's NPI number?
- Katharine Treadway's National Provider Identifier (NPI) is 1417944141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katharine Treadway's specialty?
- Katharine Treadway is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katharine Treadway located?
- Katharine Treadway's practice location on file with NPPES is 15 Parkman St, Boston, MA 02114-3117.
- What is Katharine Treadway's phone number?
- The practice phone number listed in the NPPES registry for Katharine Treadway is (617) 726-2674.
- Does Katharine Treadway accept Medicare?
- Katharine Treadway is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katharine Treadway's NPI active?
- Yes — Katharine Treadway's NPI (1417944141) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.