Dr. Derek James Lillestolen, DO
- Part D claims, 2024
- 312
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2023
- Practice address
- 1200 South Cedar Crest Boulevard, Allentown, PA 18103
- Practice phone
- Call (610) 402-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lillestolen'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. Derek James Lillestolen is an internist in Allentown, Pennsylvania
Dr. Lillestolen practices at Lehigh Valley Hospital-Cedar Crest in Allentown, Pennsylvania, part of Thomas Jefferson University.
Dr. Lillestolen's NPI, 1245915917, was assigned on June 20, 2023. Dr. Lillestolen holds Pennsylvania license OT022767.
- NPI
- 1245915917NPI Registry (opens in a new tab)
- NPI enumeration date
- June 20, 2023
- NPI status
- Active
- Practice phone
- (610) 402-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Derek James Lillestolen practices at Lehigh Valley Hospital-Cedar Crest in Allentown, Pennsylvania
Dr. Lillestolen's primary practice is Lehigh Valley Hospital-Cedar Crest, at 1200 South Cedar Crest Boulevard, Allentown, PA 18103 in Lehigh County. The practice phone is (610) 402-8000.
- Lehigh Valley Hospital-Cedar Crest1200 South Cedar Crest Boulevard, Allentown, PA 18103 · Lehigh CountyPhone(610) 402-8000
Source: Dmand AI Affiliation Data
Dr. Derek James Lillestolen is affiliated with 1 site of care
Dr. Lillestolen's primary practice is Lehigh Valley Hospital-Cedar Crest in Allentown, Pennsylvania, part of Thomas Jefferson University.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Derek James Lillestolen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lillestolen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lehigh Valley Hospital-Cedar Crest | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Thomas Jefferson University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Derek James Lillestolen is one of 5,665 internists in Pennsylvania
Internal medicine is Dr. Lillestolen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lillestolen is licensed in Pennsylvania.
Specialties and state licenses
- Internal medicine, PennsylvaniaPrimary
Internists near Dr. Lillestolen
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. Derek James Lillestolen's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Lillestolen's median patient age at 59, with 58% women.
Dr. Lillestolen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women58%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Derek James Lillestolen wrote 312 Medicare Part D claims in 2024
In 2024, Dr. Lillestolen wrote 312 Medicare Part D claims for 119 patients. 84% of them were for generic drugs. CMS names the drug for 115 of them, across 7 drugs with 11 or more claims each, at $13,559 in total drug cost.
Dr. Lillestolen's Part D claims by kind of drug, 2024
- Generic263 claims84%
- Brand-name and other49 claims16%
Dr. Lillestolen'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.
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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Dr. Derek James Lillestolen'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Derek James Lillestolen
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. Derek James Lillestolen's NPI number?
Dr. Derek James Lillestolen's NPI number is 1245915917. It was assigned on June 20, 2023, and it is active in the NPI Registry.
What kind of doctor is Dr. Derek James Lillestolen?
Dr. Derek James Lillestolen is an internist in Allentown, Pennsylvania. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Derek James Lillestolen practice?
Dr. Lillestolen practices at 1200 South Cedar Crest Boulevard, Allentown, PA 18103. Dr. Lillestolen's primary practice is Lehigh Valley Hospital-Cedar Crest in Allentown, Pennsylvania, part of Thomas Jefferson University.
What is Dr. Derek James Lillestolen's office phone number?
The practice phone on file for Dr. Lillestolen is (610) 402-8000.
What is Dr. Derek James Lillestolen's medical license number?
Dr. Lillestolen holds Pennsylvania license OT022767.
Which hospitals is Dr. Derek James Lillestolen affiliated with?
Dr. Lillestolen practices at Lehigh Valley Hospital-Cedar Crest in Allentown, Pennsylvania.
What drugs does Dr. Derek James Lillestolen prescribe most?
In 2024 Medicare Part D data, Dr. Lillestolen's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Amlodipine Besylate.
How long has Dr. Derek James Lillestolen been practicing?
Dr. Lillestolen's NPI was assigned in 2023.
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