Dr. Nadarajan Janakan, MD
- Medicare services, 2024
- 2,438
- Medicare patients, 2024
- 219
- Part D claims, 2024
- 12,039
- Hospital affiliations
- 5
- Industry payments
- $308
- Practice address
- 4052 Penrose Dr, Troy, MI 48098
- Practice phone
- Call (313) 710-4906
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arjan Medical
Troy, Michigan
Find Dr. Janakan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nadarajan Janakan is an internist in Troy, Michigan
Dr. Janakan practices at Arjan Medical in Troy, Michigan.
Dr. Janakan's NPI, 1134128812, was assigned on July 15, 2005. Dr. Janakan holds Michigan license 4301072199.
- NPI
- 1134128812NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739283490
- NPI enumeration date
- July 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (313) 710-4906
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nadarajan Janakan practices at Arjan Medical in Troy, Michigan
Dr. Janakan's primary practice is Arjan Medical, at 4052 Penrose Dr, Troy, MI 48098 in Oakland County. The practice phone is (313) 710-4906.
- Arjan Medical4052 Penrose Dr, Troy, MI 48098 · Oakland CountyPhone(313) 710-4906
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nadarajan Janakan is affiliated with 10 sites of care and 1 medical group
Dr. Janakan's primary practice is Arjan Medical in Troy, Michigan. Dr. Janakan is also affiliated with Corewell Health William Beaumont University Hospital. Dmand AI also links Dr. Janakan to 4 more hospitals, 2 home health agencies, 1 physician office, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Nadarajan Janakan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Janakan practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arjan Medical | Available with a free account |
| +9 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nadarajan Janakan is one of 4,804 internists in Michigan
Internal medicine is Dr. Janakan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Janakan is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. Janakan
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nadarajan Janakan billed Medicare for 2,438 services in 2024
CMS data shows 2,438 Medicare services from Dr. Janakan across 11 procedure codes in 2024, for 219 Medicare patients. Medicare paid $136,029 for them.
Dr. Janakan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0782024: 1,48237%
- Drugs given in the office
- 2023: 322024: 5611653%
- Other services
- 2023: 2772024: 38138%
- Surgery
- 2023: 2362024: 1494%
- Tests and treatments
- 2023: 1332024: 0100%
Where Dr. Janakan's Medicare services took place, 2024
- In an office2,01783%
- In a facility42117%
Dr. Janakan compared with the Michigan median for internists, 2024
- Dr. Janakan
- Michigan median
- Medicare services
- 2,438vs 4235.8 times
- Medicare patients
- 219vs 15938% above
- Part D claims
- 11,265vs 31435.9 times
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. Janakan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nadarajan Janakan treated 219 Medicare patients in 2024, average age 74
CMS counts 219 Medicare patients who saw Dr. Janakan in 2024. The largest group is 65 to 74, with 82 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.86, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Janakan's median patient age at 67, with 51% women.
Dr. Janakan's Medicare patients by age, 2024
Dr. Janakan's Medicare patients by sex, 2024
- Women11553%
- Men10447%
Chronic conditions among Dr. Janakan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease60%
- Diabetes53%
- Ischemic heart disease50%
- Arthritis48%
- COPD38%
- Heart failure32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Janakan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nadarajan Janakan wrote 12,039 Medicare Part D claims in 2024
In 2024, Dr. Janakan wrote 12,039 Medicare Part D claims for 524 patients. 86% of them were for generic drugs. CMS names the drug for 11,265 of them, across 157 drugs with 11 or more claims each, at $1,269,231 in total drug cost. In 2023, CMS named 9,904 claims across 138 drugs.
Dr. Janakan's Part D claims by kind of drug, 2024
- Generic10,325 claims86%
- Brand-name1,634 claims14%
- Other80 claims1%
Dr. Janakan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Janakan's Part D claims, 2024
- Opioids3%305 of 12,039 claims
- Antibiotics3%318 of 12,039 claims
- Antipsychotics, patients 65 and over0%36 of 12,039 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9,9042024: 11,26514%
Drugs named by CMS: 157 in 2024, 138 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Nadarajan Janakan offers telehealth to Medicare patients
Dr. Janakan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Janakan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nadarajan Janakan received $308 in industry payments from 2016 to 2025
CMS Open Payments shows 10 general payments to Dr. Janakan from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $90.
General payments to Dr. Janakan by program year, 2016 to 2025
Companies that paid Dr. Janakan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nadarajan Janakan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nadarajan Janakan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nadarajan Janakan's NPI number?
Dr. Nadarajan Janakan's NPI number is 1134128812. It was assigned on July 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Nadarajan Janakan?
Dr. Nadarajan Janakan is an internist in Troy, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Nadarajan Janakan practice?
Dr. Janakan practices at 4052 Penrose Dr, Troy, MI 48098. Dr. Janakan's primary practice is Arjan Medical in Troy, Michigan. Dmand AI also links Dr. Janakan to 4 hospitals, 2 home health agencies, 1 physician office, 1 group practice or clinic and 1 medical group.
What is Dr. Nadarajan Janakan's office phone number?
The practice phone on file for Dr. Janakan is (313) 710-4906.
What is Dr. Nadarajan Janakan's medical license number?
Dr. Janakan holds Michigan license 4301072199.
Which hospitals is Dr. Nadarajan Janakan affiliated with?
Dr. Janakan is affiliated with Corewell Health William Beaumont University Hospital. Dmand AI links Dr. Janakan to 4 more hospitals.
Does Dr. Nadarajan Janakan accept Medicare?
Yes. CMS data shows Dr. Janakan billed Medicare for 2,438 services in 2024, and Dr. Janakan accepts Medicare assignment.
Does Dr. Nadarajan Janakan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Janakan as offering telehealth services.
How many Medicare patients does Dr. Nadarajan Janakan see?
CMS counts 219 Medicare patients who saw Dr. Janakan in 2024, with an average age of 74.
What services does Dr. Nadarajan Janakan bill to Medicare?
In 2024, Dr. Janakan's most billed Medicare services were office visit, established patient (99213), injected or infused drug (J1010) and office visit, established patient (99214).
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What drugs does Dr. Nadarajan Janakan prescribe most?
In 2024 Medicare Part D data, Dr. Janakan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Nadarajan Janakan received payments from drug or device companies?
CMS Open Payments shows $308 in general payments to Dr. Janakan from 7 companies from 2016 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Nadarajan Janakan been practicing?
Dr. Janakan graduated from medical school in 1991, 35 years ago.
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