Kathryn Fantasia, M.D.
NPI 1023453628 · Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Fantasia, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Boston, MA (NPI 1023453628).
Provider details
- NPI number
- 1023453628
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 265826 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 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
58 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 58 | $101 |
Typical Medicare-allowed amounts for these services range $101–$101 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 188 | 28 |
| Dulaglutidebrand: Trulicity | 134 | 30 |
| Atorvastatin Calcium | 96 | 33 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 81 | 20 |
| Empagliflozinbrand: Jardiance | 73 | 17 |
| Metformin Hcl | 62 | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-05-08
- Last updated
- 2024-02-01
- Certified
- 2024-02-01
Frequently asked questions
- What is Kathryn Fantasia's NPI number?
- Kathryn Fantasia's National Provider Identifier (NPI) is 1023453628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Fantasia's specialty?
- Kathryn Fantasia is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Fantasia located?
- Kathryn Fantasia's practice location on file with NPPES is 732 Harrison Ave, Fl 2, Boston, MA 02118-2309.
- What is Kathryn Fantasia's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Fantasia is (617) 638-7470.
- Does Kathryn Fantasia accept Medicare?
- Kathryn Fantasia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Fantasia's NPI active?
- Yes — Kathryn Fantasia's NPI (1023453628) is active in the NPPES registry as of the last update on 2024-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.