Nadarajan Janakan, M.D.
NPI 1134128812 · Internal Medicine Physician · Troy, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nadarajan Janakan, M.D. is a Internal Medicine Physician provider in Troy, MI (NPI 1134128812).
Provider details
- NPI number
- 1134128812
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301072199 (MI)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,877 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 668 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 258 | $129 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 256 | $17 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 153 | $79 |
| Advance Care Planning, First 30 Minutes99497 | 135 | $83 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 158 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 908 | 257 |
| Amlodipine Besylate | 575 | 159 |
| Losartan Potassium | 407 | 123 |
| Lisinopril | 378 | 106 |
| Levothyroxine Sodium | 329 | 86 |
| Metformin Hcl | 317 | 99 |
| Furosemide | 304 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$49 across 3 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
Registry dates
- Enumerated
- 2005-07-15
- Last updated
- 2008-04-02
Frequently asked questions
- What is Nadarajan Janakan's NPI number?
- Nadarajan Janakan's National Provider Identifier (NPI) is 1134128812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nadarajan Janakan's specialty?
- Nadarajan Janakan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nadarajan Janakan located?
- Nadarajan Janakan's practice location on file with NPPES is 4967 Crooks Rd, Troy, MI 48098-5801.
- What is Nadarajan Janakan's phone number?
- The practice phone number listed in the NPPES registry for Nadarajan Janakan is (248) 952-1601.
- Does Nadarajan Janakan accept Medicare?
- Nadarajan Janakan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nadarajan Janakan's NPI active?
- Yes — Nadarajan Janakan's NPI (1134128812) is active in the NPPES registry as of the last update on 2008-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.