Janarthanan Someswarananthan, MD
NPI 1134212830 · Internal Medicine Physician · Chelmsford, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Janarthanan Someswarananthan, MD is a Internal Medicine Physician provider in Chelmsford, MA (NPI 1134212830).
Provider details
- NPI number
- 1134212830
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME83087 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,143 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 | 713 | $117 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 319 | $63 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 302 | $113 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 214 | $78 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 128 | $132 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 234 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 2,050 | 231 |
| Trazodone Hcl | 1,894 | 155 |
| Apixabanbrand: Eliquis | 1,560 | 123 |
| Gabapentin | 1,471 | 116 |
| Amlodipine Besylate | 1,196 | 125 |
| Sertraline Hcl | 1,083 | 103 |
| Levothyroxine Sodium |
Practice location
Mailing address
Additional practice locations (1)
- 25 Highland AveNewburyport, MA 01950-3867Phone: (978) 463-1000
Registry dates
- Enumerated
- 2006-10-02
- Last updated
- 2026-04-13
- Certified
- 2026-04-13
Frequently asked questions
- What is Janarthanan Someswarananthan's NPI number?
- Janarthanan Someswarananthan's National Provider Identifier (NPI) is 1134212830, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Janarthanan Someswarananthan's specialty?
- Janarthanan Someswarananthan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Janarthanan Someswarananthan located?
- Janarthanan Someswarananthan's practice location on file with NPPES is 290 Littleton Rd Unit 3, Chelmsford, MA 01824-3429.
- What is Janarthanan Someswarananthan's phone number?
- The practice phone number listed in the NPPES registry for Janarthanan Someswarananthan is (978) 685-2460.
- Does Janarthanan Someswarananthan accept Medicare?
- Janarthanan Someswarananthan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Janarthanan Someswarananthan's NPI active?
- Yes — Janarthanan Someswarananthan's NPI (1134212830) is active in the NPPES registry as of the last update on 2026-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.