Sebastian Sepulveda, MD
NPI 1558343129 · Nephrology Physician · Chelmsford, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sebastian Sepulveda, MD is a Nephrology Physician provider in Chelmsford, MA (NPI 1558343129).
Provider details
- NPI number
- 1558343129
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 204365 (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
3,399 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,553 | $124 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 494 | $138 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 457 | $81 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 207 | $181 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 180 | $121 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 77 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 408 | 121 |
| Atorvastatin Calcium | 379 | 104 |
| Metoprolol Succinate | 365 | 120 |
| Calcitriol | 352 | 92 |
| Lisinopril | 283 | 97 |
| Losartan Potassium | 255 | 66 |
| Furosemide | 230 | 80 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-18
- Last updated
- 2017-02-09
Frequently asked questions
- What is Sebastian Sepulveda's NPI number?
- Sebastian Sepulveda's National Provider Identifier (NPI) is 1558343129, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sebastian Sepulveda's specialty?
- Sebastian Sepulveda is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Sebastian Sepulveda located?
- Sebastian Sepulveda's practice location on file with NPPES is 9 North Rd, Chelmsford, MA 01824-2755.
- What is Sebastian Sepulveda's phone number?
- The practice phone number listed in the NPPES registry for Sebastian Sepulveda is (978) 458-2005.
- Does Sebastian Sepulveda accept Medicare?
- Sebastian Sepulveda is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sebastian Sepulveda's NPI active?
- Yes — Sebastian Sepulveda's NPI (1558343129) is active in the NPPES registry as of the last update on 2017-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.