Telemed J E Health
COVID-19PandemicsTelemedicine
Dr. Brian Hasselfeld, MD
NPI1700270360PAC ID0244525095
- Medicare services, 2024
- 108
- Medicare patients, 2024
- 34
- Part D claims, 2024
- 252
- Publications
- 4
- Hospital affiliations
- 2
- Practice address
- 600 N Wolfe St, Baltimore, MD 21287
- Practice phone
- Call (855) 662-3017
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Hospital Nelson/Harvey Building
Baltimore, Maryland
Find Dr. Hasselfeld'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. Brian Hasselfeld is an internist in Baltimore, Maryland
Dr. Hasselfeld practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
Dr. Hasselfeld's NPI, 1700270360, was assigned on March 22, 2015. Dr. Hasselfeld graduated from Tulane University School of Medicine in 2015. Dr. Hasselfeld holds Maryland license D87400.
NPI and contact details
- NPI
- 1700270360NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244525095
- NPI enumeration date
- March 22, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (855) 662-3017
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brian Hasselfeld practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland
Dr. Hasselfeld's primary practice is Johns Hopkins Hospital Nelson/Harvey Building, at 600 N Wolfe St, Baltimore, MD 21287 in Baltimore City. The practice phone is (855) 662-3017.
- Johns Hopkins Hospital Nelson/Harvey Building600 N Wolfe St, Baltimore, MD 21287 · Baltimore CityPhone(855) 662-3017
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Brian Hasselfeld is affiliated with 4 sites of care and 1 medical group
Dr. Hasselfeld's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dr. Hasselfeld is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins Community Physicians. Dmand AI also links Dr. Hasselfeld to 1 more hospital and 1 group practice or clinic, each named with a free account.
Johns Hopkins Hospital Nelson/Harvey BuildingPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Brian Hasselfeld's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hasselfeld practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Hospital Nelson/Harvey Building | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Hasselfeld practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Brian Hasselfeld is one of 3,320 internists in Maryland
Internal medicine is Dr. Hasselfeld's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Hasselfeld's licenses on file in 2 states: Maryland and Massachusetts.
Specialties and state licenses
- Internal medicine, MarylandPrimary
- Massachusetts license
Internists near Dr. Hasselfeld
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. Brian Hasselfeld billed Medicare for 108 services in 2024
CMS data shows 108 Medicare services from Dr. Hasselfeld across 4 procedure codes in 2024, for 34 Medicare patients. Medicare paid $5,806 for them. Every service was in an office.
Medicare services, 2024108
Medicare patients34
Paid by Medicare$5,806
Procedure codes4
Dr. Hasselfeld's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 252024: 4684%
- Surgery
- 2023: 282024: 4146%
- Other services
- 2023: 182024: 2117%
Dr. Hasselfeld compared with the Maryland median for internists, 2024
- Dr. Hasselfeld
- Maryland median
- Medicare services
- 108vs 65684% below
- Medicare patients
- 34vs 25186% below
- Part D claims
- 118vs 30962% below
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Hasselfeld'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. Hasselfeld?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hasselfeld and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brian Hasselfeld treated 34 Medicare patients in 2024, average age 69
CMS counts 34 Medicare patients who saw Dr. Hasselfeld in 2024. The largest group is 65 to 74, with 18 patients. 75% of them have high cholesterol, and 68% have high blood pressure. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hasselfeld's median patient age at 59, with 42% women.
Medicare patients, 202434
Average age69
Average risk score1.21
Dr. Hasselfeld's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hasselfeld's Medicare patients by sex, 2024
- Women1338%
- Men2162%
Chronic conditions among Dr. Hasselfeld's Medicare patients, 2024
- High cholesterol75%
- High blood pressure68%
- Diabetes41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hasselfeld'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
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brian Hasselfeld wrote 252 Medicare Part D claims in 2024
In 2024, Dr. Hasselfeld wrote 252 Medicare Part D claims for 29 patients. 92% of them were for generic drugs. CMS names the drug for 118 of them, across 5 drugs with 11 or more claims each, at $18,150 in total drug cost. In 2023, CMS named 68 claims across 3 drugs.
Part D claims, 2024252
Drugs named by CMS5
Total drug cost$18,150
Part D patients29
Dr. Hasselfeld's Part D claims by kind of drug, 2024
- Generic232 claims92%
- Brand-name20 claims8%
Dr. Hasselfeld'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 682024: 11874%
Drugs named by CMS: 5 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
How Dr. Brian Hasselfeld takes part in Medicare
Dr. Hasselfeld 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
Find internists like Dr. Hasselfeld by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Brian Hasselfeld has 4 publications on record
Dmand AI links 4 papers to Dr. Hasselfeld, published from 2021 to 2023. 2023 was the busiest year, with 2. The most frequent topics are COVID-19, Pandemics and Telemedicine. Dr. Hasselfeld has published most often in Telemed J E Health. Dr. Hasselfeld's most frequent co-authors are Lauren Elizabeth Claus, MD, Jeremy Epstein, MD and Carolyn H. Marcus.
Papers4
Years published2021 to 2023
Topics Dr. Hasselfeld writes about most
- COVID-19
- Pandemics
- Telemedicine
Dr. Hasselfeld's most frequent co-authors
- Lauren Elizabeth Claus, MD1 shared paper
- Jeremy Epstein, MD1 shared paper
- Carolyn H. Marcus1 shared paper
Recent publications by Dr. Hasselfeld
Telemed J E Health
COVID-19PandemicsPsychiatry
Ambulatory CareCOVID-19Early Diagnosis
Competency-Based EducationEducation, Medical, GraduateInternship and Residency
See who Dr. Hasselfeld researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hasselfeld works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Brian Hasselfeld graduated from Tulane University School of Medicine
Dr. Hasselfeld graduated from Tulane University School of Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brian Hasselfeld'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 | 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 |
| 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. Brian Hasselfeld
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. Brian Hasselfeld's NPI number?
Dr. Brian Hasselfeld's NPI number is 1700270360. It was assigned on March 22, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian Hasselfeld?
Dr. Brian Hasselfeld is an internist in Baltimore, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Brian Hasselfeld practice?
Dr. Hasselfeld practices at 600 N Wolfe St, Baltimore, MD 21287. Dr. Hasselfeld's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dmand AI also links Dr. Hasselfeld to 1 hospital and 1 group practice or clinic.
What is Dr. Brian Hasselfeld's office phone number?
The practice phone on file for Dr. Hasselfeld is (855) 662-3017.
What is Dr. Brian Hasselfeld's medical license number?
Dr. Hasselfeld holds Maryland license D87400, one of the licenses on file in 2 states.
Which states has Dr. Brian Hasselfeld been licensed in?
Dmand AI has state licenses on file for Dr. Hasselfeld in Maryland and Massachusetts.
Which hospitals is Dr. Brian Hasselfeld affiliated with?
Dr. Hasselfeld is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Hasselfeld to 1 more hospital.
What medical group is Dr. Brian Hasselfeld part of?
Dr. Hasselfeld is linked to Johns Hopkins Community Physicians.
Does Dr. Brian Hasselfeld accept Medicare?
Yes. CMS data shows Dr. Hasselfeld billed Medicare for 108 services in 2024, and Dr. Hasselfeld accepts Medicare assignment.
How many Medicare patients does Dr. Brian Hasselfeld see?
CMS counts 34 Medicare patients who saw Dr. Hasselfeld in 2024, with an average age of 69.
Show 6 more questionsShow fewer questions
What services does Dr. Brian Hasselfeld bill to Medicare?
In 2024, Dr. Hasselfeld's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Brian Hasselfeld go to medical school?
Dr. Hasselfeld graduated from Tulane University School of Medicine in 2015.
What drugs does Dr. Brian Hasselfeld prescribe most?
In 2024 Medicare Part D data, Dr. Hasselfeld's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Ozempic.
How long has Dr. Brian Hasselfeld been practicing?
Dr. Hasselfeld graduated from medical school in 2015, 11 years ago.
Does Dr. Brian Hasselfeld do research?
Dmand AI links 4 publications to Dr. Hasselfeld, published from 2021 to 2023.
Who does Dr. Brian Hasselfeld publish with?
Dr. Hasselfeld's most frequent co-authors are Lauren Elizabeth Claus, MD (1 shared paper), Jeremy Epstein, MD (1 shared paper) and Carolyn H. Marcus (1 shared paper).
Selling to internal medicine practices?
See internists in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card