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Edit this profileAt a glance
- 2500 N State St, Jackson, MS 39216
About Dr. Lennep
Day S. Lennep, M.D. practices internal medicine in Jackson, MS. Day is a 2013 graduate of University of Mississippi School of Medicine. Medicare claims data shows Day provided 144,661 services to 3,523 patients. The services billed most often include injection, tocilizumab, 1 mg, injection, golimumab, 1 mg, for intravenous use, and injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered). The provider's National Provider Identifier (NPI) is 1538509955.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (601) 984-5601
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
2500 N STATE ST
Jackson, MS 39216
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer Prevention
Cancer risk
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
Heart & circulation
Heart health
Hospital-based procedures
Imaging referral
Immunizations
Infection & Microbiology Tests
Lifestyle & Prevention
Longevity
Lower endoscopy
Lungs & Breathing
Metabolic & Weight
Metabolic health
Occupational health
Occupational Health
Office Procedures
Preventive and evaluation
Preventive imaging
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
- Blood pressure screening
- Cancer screening and prevention planning
- Diabetes and prediabetes screening
- EKG
- Spirometry
Screenings & Diagnostics
Travel Health
Travel medicine
Wellness
Wellness & Screening
Workplace health
Skin growths
Sleep
Most searched procedures
Bones & Joints
Brain and nerves
Digestive
Exams & Consultations
Lab tests
Minor procedures
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
144,661 services · 3,523 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
1,124 | More than most peers in Internal Medicine |
| X-ray of hand, 2 views | Imaging | 73120 |
106 | Too few peers to compare |
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
561 | More than most peers in Internal Medicine |
| Administration of chemotherapy into vein, each additional hour | Treatment | 96415 |
197 | More often than most peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
127 | More often than most peers in Internal Medicine |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | Treatment | 96401 |
68 | As often as other peers in Internal Medicine |
| Injection, tocilizumab, 1 mg | Drug given | J3262 |
80,160 | More than most peers in Internal Medicine |
| Injection, golimumab, 1 mg, for intravenous use | Drug given | J1602 |
24,300 | More than most peers in Internal Medicine |
| Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | Drug given | J0717 |
13,600 | Less often than most peers in Internal Medicine |
| Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | Drug given | J0129 |
7,400 | More often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other internists in Jackson 7
Same specialty, same city.
Trained at University of Mississippi School of Medicine 6
Other providers in the same specialty who trained at the same institution.
Class of 2013 at University of Mississippi School of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 7
Providers in MS who bill this service to Medicare most often.
Common questions
What kind of doctor is Day S. Lennep?
Day S. Lennep is an internist in Jackson, MS. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
What is Day S. Lennep's address?
Day S. Lennep is listed at 2500 N State St, Jackson, MS 39216. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Day S. Lennep?
The number on file is (601) 984-5601. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Day S. Lennep?
Day S. Lennep's National Provider Identifier is 1538509955. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Day S. Lennep train?
Day S. Lennep attended University of Mississippi School of Medicine, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Day S. Lennep have?
Day S. Lennep has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Day S. Lennep perform?
According to Medicare billing data, Day S. Lennep performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of hand, 2 views; provides treatments such as administration of chemotherapy into vein, 1 hour or less and administration of chemotherapy into vein, each additional hour, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Day S. Lennep's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Day S. Lennep. If this is you, claiming it is free.
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