Joshan Shajan, M.D.
NPI 1790043040 · Internal Medicine Physician · Cos Cob, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joshan Shajan, M.D. is a Internal Medicine Physician provider in Cos Cob, CT (NPI 1790043040).
Provider details
- NPI number
- 1790043040
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A155675 (CA)
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 tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,628 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 406 | $136 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 404 | $94 |
| Administration and Interpretation of Patient-Focused Health Risk Assessment96160 | 101 | $3 |
| Advance Care Planning, First 30 Minutes99497 | 99 | $87 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 95 | $140 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 83 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 168 | 64 |
| Atorvastatin Calcium | 136 | 52 |
| Levothyroxine Sodium | 128 | 46 |
| Losartan Potassium | 107 | 39 |
| Methylprednisolone | 96 | 68 |
| Metformin Hcl | 74 | 33 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,090 across 54 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3863 Clairemont DrSan Diego, CA 92117-5831Phone: (858) 483-5570Fax: (858) 483-5572
Registry dates
- Enumerated
- 2012-04-24
- Last updated
- 2026-04-10
- Certified
- 2026-04-10
Frequently asked questions
- What is Joshan Shajan's NPI number?
- Joshan Shajan's National Provider Identifier (NPI) is 1790043040, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshan Shajan's specialty?
- Joshan Shajan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joshan Shajan located?
- Joshan Shajan's practice location on file with NPPES is 40 E Putnam Ave Ste 1b, Cos Cob, CT 06807-2606.
- What is Joshan Shajan's phone number?
- The practice phone number listed in the NPPES registry for Joshan Shajan is (203) 489-5442.
- Does Joshan Shajan accept Medicare?
- Joshan Shajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joshan Shajan's NPI active?
- Yes — Joshan Shajan's NPI (1790043040) is active in the NPPES registry as of the last update on 2026-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.