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Dr. Nathan Iyer Krishnan, MD
NPI1770937542PAC ID6901136563
- Medicare services, 2024
- 138
- Medicare patients, 2024
- 149
- Part D claims, 2024
- 15
- Publications
- 4
- Hospital affiliations
- 1
- Practice address
- 1211 Medical Center Drive, Nashville, TN 37232
- Practice phone
- Call (615) 322-3454
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Krishnan's professional email, personal email and mobile number
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Dr. Nathan Iyer Krishnan is a hospitalist in Nashville, Tennessee
Dr. Krishnan practices at Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center.
Dr. Krishnan's NPI, 1770937542, was assigned on April 19, 2016. Dr. Krishnan holds Tennessee license 58678.
NPI and contact details
- NPI
- 1770937542NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901136563
- NPI enumeration date
- April 19, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (615) 322-3454
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathan Iyer Krishnan practices at Vanderbilt University Medical Center in Nashville, Tennessee
Dr. Krishnan's primary practice is Vanderbilt University Medical Center, at 1211 Medical Center Drive, Nashville, TN 37232 in Davidson County. The practice phone is (615) 322-3454.
- Vanderbilt University Medical Center1211 Medical Center Drive, Nashville, TN 37232 · Davidson CountyPhone(615) 322-3454
Source: Dmand AI Affiliation Data
Dr. Nathan Iyer Krishnan is affiliated with 2 sites of care and 1 medical group
Dr. Krishnan's primary practice is Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center. The medical group on file is Vanderbilt University Medical Center. Dmand AI also links Dr. Krishnan to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nathan Iyer Krishnan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Krishnan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vanderbilt University Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Nathan Iyer Krishnan is one of 425 hospitalists in Tennessee
Hospitalist is Dr. Krishnan's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Krishnan is licensed in Tennessee.
Specialties and state licenses
- Hospitalist, TennesseePrimary
Hospitalists near Dr. Krishnan
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
425hospitalists in Tennessee119hospitalists in Nashville62hospitalists at Vanderbilt University Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nathan Iyer Krishnan billed Medicare for 138 services in 2024
CMS data shows 138 Medicare services from Dr. Krishnan across 3 procedure codes in 2024, for 149 Medicare patients. Medicare paid $11,841 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024138
Medicare patients149
Paid by Medicare$11,841
Procedure codes3
Dr. Krishnan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 962024: 13844%
- Surgery
- 2023: 192024: 0100%
Dr. Krishnan compared with the Tennessee median for hospitalists, 2024
- Dr. Krishnan
- Tennessee median
- Medicare services
- 138vs 53474% below
- Medicare patients
- 149vs 19524% below
- Part D claims
- 261vs 1052.5 times
Medians across 385 hospitalists in Tennessee with Dmand AI profiles that report each measure.
Dr. Krishnan'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Krishnan and other hospitalists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathan Iyer Krishnan treated 149 Medicare patients in 2024, average age 71
CMS counts 149 Medicare patients who saw Dr. Krishnan in 2024. The largest group is 65 to 74, with 63 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 3.19, 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. Krishnan's median patient age at 60, with 55% women.
Medicare patients, 2024149
Average age71
Average risk score3.19
Also on Medicaid17%
Dr. Krishnan's Medicare patients by age, 2024
Dr. Krishnan's Medicare patients by sex, 2024
- Women6342%
- Men8658%
Chronic conditions among Dr. Krishnan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease59%
- Arthritis56%
- Diabetes55%
- Mood disorders44%
- Ischemic heart disease43%
- Depression40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Krishnan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nathan Iyer Krishnan wrote 15 Medicare Part D claims in 2024
In 2024, Dr. Krishnan wrote 15 Medicare Part D claims. 87% of them were for generic drugs. They cover 13 drugs, with $4,454 in total drug cost. In 2018, CMS named 417 claims across 23 drugs.
Part D claims, 202415
Drugs named by CMS13
Total drug cost$4,454
Dr. Krishnan's Part D claims by kind of drug, 2024
- Generic13 claims87%
- Brand-name and other2 claims13%
Dr. Krishnan's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 4172019: 26137%
Drugs named by CMS: 13 in 2019, 23 in 2018.
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
How Dr. Nathan Iyer Krishnan takes part in Medicare
Dr. Krishnan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Dr. Nathan Iyer Krishnan has 4 publications on record
Dmand AI links 4 papers to Dr. Krishnan, published from 2014 to 2015. Dr. Krishnan's most frequent co-authors are Earl Harley, Matthew Kirk Steehler, MD and Taylor David Coston, MD.
Papers4
Years published2014 to 2015
Dr. Krishnan's most frequent co-authors
- Earl Harley3 shared papers
- Matthew Kirk Steehler, MD2 shared papers
- Taylor David Coston, MD1 shared paper
Recent publications by Dr. Krishnan
Otolaryngol Head Neck Surg
Pneumococcal InfectionsPneumococcal Vaccines
Am J Respir Crit Care Med
Critical CareCross-Over StudiesCrystalloid Solutions
See who Dr. Krishnan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Krishnan works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Nathan Iyer Krishnan'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Nathan Iyer Krishnan
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. Nathan Iyer Krishnan's NPI number?
Dr. Nathan Iyer Krishnan's NPI number is 1770937542. It was assigned on April 19, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathan Iyer Krishnan?
Dr. Nathan Iyer Krishnan is a hospitalist in Nashville, Tennessee. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Nathan Iyer Krishnan practice?
Dr. Krishnan practices at 1211 Medical Center Drive, Nashville, TN 37232. Dr. Krishnan's primary practice is Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center. Dmand AI also links Dr. Krishnan to 1 group practice or clinic.
What is Dr. Nathan Iyer Krishnan's office phone number?
The practice phone on file for Dr. Krishnan is (615) 322-3454.
What is Dr. Nathan Iyer Krishnan's medical license number?
Dr. Krishnan holds Tennessee license 58678.
Which hospitals is Dr. Nathan Iyer Krishnan affiliated with?
Dr. Krishnan practices at Vanderbilt University Medical Center in Nashville, Tennessee.
What medical group is Dr. Nathan Iyer Krishnan part of?
Dr. Krishnan is linked to Vanderbilt University Medical Center.
Does Dr. Nathan Iyer Krishnan accept Medicare?
Yes. CMS data shows Dr. Krishnan billed Medicare for 138 services in 2024, and Dr. Krishnan accepts Medicare assignment.
How many Medicare patients does Dr. Nathan Iyer Krishnan see?
CMS counts 149 Medicare patients who saw Dr. Krishnan in 2024, with an average age of 71.
What services does Dr. Nathan Iyer Krishnan bill to Medicare?
In 2024, Dr. Krishnan's most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99232) and hospital inpatient care (99223).
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What drugs does Dr. Nathan Iyer Krishnan prescribe most?
In 2019 Medicare Part D data, Dr. Krishnan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Omeprazole.
How long has Dr. Nathan Iyer Krishnan been practicing?
Dr. Krishnan graduated from medical school in 2016, 10 years ago.
Does Dr. Nathan Iyer Krishnan do research?
Dmand AI links 4 publications to Dr. Krishnan, published from 2014 to 2015.
Who does Dr. Nathan Iyer Krishnan publish with?
Dr. Krishnan's most frequent co-authors are Earl Harley (3 shared papers), Matthew Kirk Steehler, MD (2 shared papers) and Taylor David Coston, MD (1 shared paper).
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