Dr. Andrew L. Himelstein, MD
- Medicare services, 2024
- 20,608
- Medicare patients, 2024
- 494
- Part D claims, 2024
- 1,499
- MIPS score, 2024
- 85
- Industry payments
- $318
- Practice address
- 501 W 14th St, Wilmington, DE 19801
- Practice phone
- Call (302) 733-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ChristianaCare Wilmington Hospital
Wilmington, Delaware
Find Dr. Himelstein'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. Andrew L. Himelstein is a hematologist and oncologist in Wilmington, Delaware
Dr. Himelstein practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware.
Dr. Himelstein's NPI, 1841269966, was assigned on March 14, 2006. Dr. Himelstein graduated from Washington University School of Medicine in 1985. Dr. Himelstein holds Delaware license CI0003651.
- NPI
- 1841269966NPI Registry (opens in a new tab)
- NPI enumeration date
- March 14, 2006
- NPI status
- Active
- Practice phone
- (302) 733-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Andrew L. Himelstein practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware
Dr. Himelstein's primary practice is ChristianaCare Wilmington Hospital, at 501 W 14th St, Wilmington, DE 19801 in New Castle County. The practice phone is (302) 733-1000.
- ChristianaCare Wilmington Hospital501 W 14th St, Wilmington, DE 19801 · New Castle CountyPhone(302) 733-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Andrew L. Himelstein is affiliated with 3 sites of care and 2 medical groups
Dr. Himelstein's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. The medical group on file is Medical Oncology Hematology Consultants, PA. Dmand AI also links Dr. Himelstein to 1 more group practice or clinic, 1 hospice 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. Andrew L. Himelstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Himelstein practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Wilmington Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Andrew L. Himelstein is one of 42 hematologists and oncologists in Delaware
Hematology and oncology is Dr. Himelstein's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Himelstein is licensed in Delaware.
Specialties and state licenses
- Hematology and oncology, DelawarePrimary
Hematologists and oncologists near Dr. Himelstein
Counts of hematologists and oncologists 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. Andrew L. Himelstein billed Medicare for 20,608 services in 2024
CMS data shows 20,608 Medicare services from Dr. Himelstein across 22 procedure codes in 2024, for 494 Medicare patients. Medicare paid $753,079 for them. Every service was in an office.
Dr. Himelstein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 26,3882024: 18,93328%
- Office and hospital visits
- 2023: 1,0342024: 9568%
- Tests and treatments
- 2023: 6222024: 71916%
Dr. Himelstein compared with the Delaware median for hematologists and oncologists, 2024
- Dr. Himelstein
- Delaware median
- Medicare services
- 20,608vs 81025.4 times
- Medicare patients
- 494vs 41120% above
- Part D claims
- 1,136vs 59691% above
Medians across 40 hematologists and oncologists in Delaware with Dmand AI profiles that report each measure.
Dr. Himelstein'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.
Need commercial claims for Dr. Himelstein?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Himelstein and other hematologists and oncologists in Delaware.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew L. Himelstein treated 494 Medicare patients in 2024, average age 76
CMS counts 494 Medicare patients who saw Dr. Himelstein in 2024. The largest group is 75 to 84, with 201 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.88, 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. Himelstein's median patient age at 76, with 56% women.
Dr. Himelstein's Medicare patients by age, 2024
Dr. Himelstein's Medicare patients by sex, 2024
- Women27455%
- Men22045%
Chronic conditions among Dr. Himelstein's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Cancer48%
- Diabetes33%
- Chronic kidney disease30%
- Mood disorders28%
- Anxiety26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Himelstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women56%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Andrew L. Himelstein wrote 1,499 Medicare Part D claims in 2024
In 2024, Dr. Himelstein wrote 1,499 Medicare Part D claims for 262 patients. 72% of them were for generic drugs. CMS names the drug for 1,136 of them, across 38 drugs with 11 or more claims each, at $3,058,080 in total drug cost. In 2023, CMS named 971 claims across 33 drugs.
Dr. Himelstein's Part D claims by kind of drug, 2024
- Generic1,073 claims72%
- Brand-name and other426 claims28%
Dr. Himelstein'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. Himelstein's Part D claims, 2024
- Opioids5%80 of 1,499 claims
- Antibiotics2%35 of 1,499 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: 9712024: 1,13617%
Drugs named by CMS: 38 in 2024, 33 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. Andrew L. Himelstein scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Himelstein for performance year 2024, reported individually.
Dr. Himelstein's MIPS scores, performance year 2024
- 85of 100Final score
- 68.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Andrew L. Himelstein received $318 in industry payments from 2018 to 2025
CMS Open Payments shows 15 general payments to Dr. Himelstein from 8 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 96% of the total. Janssen Pharmaceuticals, Inc paid the most, $78.
General payments to Dr. Himelstein by program year, 2018 to 2025
General payments to Dr. Himelstein by kind, 2018 to 2025
- Food and beverage$30696%
- Education$124%
Companies that paid Dr. Himelstein the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Andrew L. Himelstein graduated from Washington University School of Medicine
Dr. Himelstein graduated from Washington University School of Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Andrew L. Himelstein'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 | Clinician Public Reporting: Overall MIPS Performance (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. Andrew L. Himelstein
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. Andrew L. Himelstein's NPI number?
Dr. Andrew L. Himelstein's NPI number is 1841269966. It was assigned on March 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew L. Himelstein?
Dr. Andrew L. Himelstein is a hematologist and oncologist in Wilmington, Delaware. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Andrew L. Himelstein practice?
Dr. Himelstein practices at 501 W 14th St, Wilmington, DE 19801. Dr. Himelstein's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. Dmand AI also links Dr. Himelstein to 1 group practice or clinic, 1 hospice and 1 medical group.
What is Dr. Andrew L. Himelstein's office phone number?
The practice phone on file for Dr. Himelstein is (302) 733-1000.
What is Dr. Andrew L. Himelstein's medical license number?
Dr. Himelstein holds Delaware license CI0003651.
What medical group is Dr. Andrew L. Himelstein part of?
Dr. Himelstein is linked to Medical Oncology Hematology Consultants, PA. Dmand AI links Dr. Himelstein to 1 more medical group.
Does Dr. Andrew L. Himelstein accept Medicare?
Yes. CMS data shows Dr. Himelstein billed Medicare for 20,608 services in 2024.
What is Dr. Andrew L. Himelstein's MIPS score?
Dr. Himelstein's MIPS final score for performance year 2024 is 85 out of 100, reported individually.
How many Medicare patients does Dr. Andrew L. Himelstein see?
CMS counts 494 Medicare patients who saw Dr. Himelstein in 2024, with an average age of 76.
What services does Dr. Andrew L. Himelstein bill to Medicare?
In 2024, Dr. Himelstein's most billed Medicare services were injected or infused drug (J9271), injected or infused drug (J0897) and injected or infused drug (J1100).
Show 4 more questionsShow fewer questions
Where did Dr. Andrew L. Himelstein go to medical school?
Dr. Himelstein graduated from Washington University School of Medicine in 1985.
What drugs does Dr. Andrew L. Himelstein prescribe most?
In 2024 Medicare Part D data, Dr. Himelstein's most prescribed drugs by claims were Anastrozole, Xarelto and Eliquis.
Has Dr. Andrew L. Himelstein received payments from drug or device companies?
CMS Open Payments shows $318 in general payments to Dr. Himelstein from 8 companies from 2018 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Andrew L. Himelstein been practicing?
Dr. Himelstein graduated from medical school in 1985, 41 years ago.
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