Dr. Leonard Nadong Lamsen, MD
- Medicare services, 2024
- 294
- Medicare patients, 2024
- 296
- Part D claims, 2024
- 184
- Hospital affiliations
- 1
- Industry payments
- $966
- Practice address
- 1924 Alcoa Highway, Knoxville, TN 37920
- Practice phone
- Call (865) 305-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lamsen'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. Leonard Nadong Lamsen is an emergency medicine physician in Knoxville, Tennessee
Dr. Lamsen practices at The University of Tennessee Medical Center in Knoxville, Tennessee, part of Ut Medical.
Dr. Lamsen's NPI, 1902006257, was assigned on July 24, 2007. Dr. Lamsen graduated from Wayne State University School of Medicine in 2007. Dr. Lamsen holds Tennessee license MD46106.
- NPI
- 1902006257NPI Registry (opens in a new tab)
- NPI enumeration date
- July 24, 2007
- NPI status
- Active
- Practice phone
- (865) 305-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Leonard Nadong Lamsen practices at The University of Tennessee Medical Center in Knoxville, Tennessee
Dr. Lamsen's primary practice is The University of Tennessee Medical Center, at 1924 Alcoa Highway, Knoxville, TN 37920 in Knox County. The practice phone is (865) 305-9000.
- The University of Tennessee Medical Center1924 Alcoa Highway, Knoxville, TN 37920 · Knox CountyPhone(865) 305-9000
Source: Dmand AI Affiliation Data
Dr. Leonard Nadong Lamsen is affiliated with 2 sites of care and 2 medical groups
Dr. Lamsen's primary practice is The University of Tennessee Medical Center in Knoxville, Tennessee, part of Ut Medical. The medical group on file is Southeastern Emergency Physicians. Dmand AI also links Dr. Lamsen to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leonard Nadong Lamsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lamsen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The University of Tennessee Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leonard Nadong Lamsen is one of 1,088 emergency medicine physicians in Tennessee
Emergency medicine is Dr. Lamsen's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Lamsen is licensed in Tennessee.
Specialties and state licenses
- Emergency medicine, TennesseePrimary
Emergency medicine physicians near Dr. Lamsen
Counts of emergency medicine physicians 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. Leonard Nadong Lamsen billed Medicare for 294 services in 2024
CMS data shows 294 Medicare services from Dr. Lamsen across 3 procedure codes in 2024, for 296 Medicare patients. Medicare paid $35,109 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lamsen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3452024: 29415%
Dr. Lamsen compared with the Tennessee median for emergency medicine physicians, 2024
- Dr. Lamsen
- Tennessee median
- Medicare services
- 294vs 26611% above
- Medicare patients
- 296vs 25715% above
- Part D claims
- 113vs 9322% above
Medians across 1,079 emergency medicine physicians in Tennessee with Dmand AI profiles that report each measure.
Dr. Lamsen'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. Lamsen and other emergency medicine physicians in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leonard Nadong Lamsen treated 296 Medicare patients in 2024, average age 74
CMS counts 296 Medicare patients who saw Dr. Lamsen in 2024. The largest group is 65 to 74, with 108 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 2.10, 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. Lamsen's median patient age at 53, with 58% women.
Dr. Lamsen's Medicare patients by age, 2024
Dr. Lamsen's Medicare patients by sex, 2024
- Women14950%
- Men14750%
Chronic conditions among Dr. Lamsen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Chronic kidney disease46%
- Ischemic heart disease42%
- Mood disorders42%
- Anxiety41%
- Diabetes41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lamsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leonard Nadong Lamsen wrote 184 Medicare Part D claims in 2024
In 2024, Dr. Lamsen wrote 184 Medicare Part D claims for 128 patients. 96% of them were for generic drugs. CMS names the drug for 113 of them, across 7 drugs with 11 or more claims each, at $645 in total drug cost. In 2023, CMS named 35 claims across 3 drugs.
Dr. Lamsen's Part D claims by kind of drug, 2024
- Generic177 claims96%
- Brand-name and other7 claims4%
Dr. Lamsen'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. Lamsen's Part D claims, 2024
- Opioids11%21 of 184 claims
- Antibiotics41%75 of 184 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: 352024: 113223%
Drugs named by CMS: 7 in 2024, 3 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
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Dr. Leonard Nadong Lamsen received $966 in industry payments from 2016 to 2024
CMS Open Payments shows 15 general payments to Dr. Lamsen from 9 drug and device companies from 2016 to 2024. Travel and lodging make up the largest share, 71% of the total. FUJIFILM SonoSite, Inc. paid the most, $687.
General payments to Dr. Lamsen by program year, 2016 to 2024
General payments to Dr. Lamsen by kind, 2016 to 2024
- Travel and lodging$68771%
- Food and beverage$27929%
Companies that paid Dr. Lamsen the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leonard Nadong Lamsen graduated from Wayne State University School of Medicine
Dr. Lamsen graduated from Wayne State University School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leonard Nadong Lamsen'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Leonard Nadong Lamsen
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. Leonard Nadong Lamsen's NPI number?
Dr. Leonard Nadong Lamsen's NPI number is 1902006257. It was assigned on July 24, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard Nadong Lamsen?
Dr. Leonard Nadong Lamsen is an emergency medicine physician in Knoxville, Tennessee. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Leonard Nadong Lamsen practice?
Dr. Lamsen practices at 1924 Alcoa Highway, Knoxville, TN 37920. Dr. Lamsen's primary practice is The University of Tennessee Medical Center in Knoxville, Tennessee, part of Ut Medical. Dmand AI also links Dr. Lamsen to 1 group practice or clinic and 1 medical group.
What is Dr. Leonard Nadong Lamsen's office phone number?
The practice phone on file for Dr. Lamsen is (865) 305-9000.
What is Dr. Leonard Nadong Lamsen's medical license number?
Dr. Lamsen holds Tennessee license MD46106.
Which hospitals is Dr. Leonard Nadong Lamsen affiliated with?
Dr. Lamsen practices at The University of Tennessee Medical Center in Knoxville, Tennessee.
What medical group is Dr. Leonard Nadong Lamsen part of?
Dr. Lamsen is linked to Southeastern Emergency Physicians. Dmand AI links Dr. Lamsen to 1 more medical group.
Does Dr. Leonard Nadong Lamsen accept Medicare?
Yes. CMS data shows Dr. Lamsen billed Medicare for 294 services in 2024.
How many Medicare patients does Dr. Leonard Nadong Lamsen see?
CMS counts 296 Medicare patients who saw Dr. Lamsen in 2024, with an average age of 74.
What services does Dr. Leonard Nadong Lamsen bill to Medicare?
In 2024, Dr. Lamsen's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
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Where did Dr. Leonard Nadong Lamsen go to medical school?
Dr. Lamsen graduated from Wayne State University School of Medicine in 2007.
What drugs does Dr. Leonard Nadong Lamsen prescribe most?
In 2024 Medicare Part D data, Dr. Lamsen's most prescribed drugs by claims were Methocarbamol, Sulfamethoxazole-Trimethoprim and Amoxicillin-Clavulanate Potass.
Has Dr. Leonard Nadong Lamsen received payments from drug or device companies?
CMS Open Payments shows $966 in general payments to Dr. Lamsen from 9 companies from 2016 to 2024. The largest total came from FUJIFILM SonoSite, Inc.
How long has Dr. Leonard Nadong Lamsen been practicing?
Dr. Lamsen graduated from medical school in 2007, 19 years ago.
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