Catherine Sullivan, M.D.
NPI 1598031403 · Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Sullivan, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Boston, MA (NPI 1598031403).
Provider details
- NPI number
- 1598031403
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 269544 (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
14 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
306 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 | 115 | $102 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 81 | $82 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 70 | $52 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 29 | $137 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 11 | $140 |
Typical Medicare-allowed amounts for these services range $52–$140 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 150 | 40 |
| Dulaglutidebrand: Trulicity | 150 | 34 |
| Metformin Hcl | 127 | 37 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 118 | 43 |
| Tirzepatidebrand: Mounjaro | 103 | 22 |
| Semaglutidebrand: Ozempic | 91 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-25
- Last updated
- 2017-09-07
Frequently asked questions
- What is Catherine Sullivan's NPI number?
- Catherine Sullivan's National Provider Identifier (NPI) is 1598031403, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Sullivan's specialty?
- Catherine Sullivan is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Sullivan located?
- Catherine Sullivan's practice location on file with NPPES is 732 Harrison Ave, Boston, MA 02118.
- What is Catherine Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Catherine Sullivan is (617) 638-7470.
- Does Catherine Sullivan accept Medicare?
- Catherine Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Sullivan's NPI active?
- Yes — Catherine Sullivan's NPI (1598031403) is active in the NPPES registry as of the last update on 2017-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.