Brian Hasselfeld, M.D.
Internal Medicine Physician · Baltimore, MD
Brian Hasselfeld, M.D. is an internal medicine physician with a practice address in Baltimore, Maryland, and NPI 1700270360, issued on Mar 22, 2015. Check the license (Maryland D87400, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Brian Hasselfeld
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- D87400 MD
263189 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1501 S Clinton St Ste 200, Baltimore, MD 21224
- Phone
- (410) 522-9940
- Enumerated
- Mar 22, 2015
- Record last updated
- Oct 5, 2022
- Medicare enrollment
- Enrolled (PECOS I20190725001654); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 1501 S Clinton St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Brian Hasselfeld in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D87400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
252 Medicare Part D claims for 29 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Atorvastatin Calcium38 claims
- Losartan Potassium37 claims
- Ozempic18 claims
- Amlodipine Besylate14 claims
- Metoprolol Succinate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Johns Hopkins Community Physicians, IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Hasselfeld among 3,904 internal medicine physician records in Maryland
Brian Hasselfeld, M.D. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 77% of them.
- NPI issued2015 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2003 among the 2,445 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,278 internal medicine physician records list a practice address in Baltimore
They are 1,278 of the 35,183 NPPES records with a practice address in Baltimore, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Baltimore → Internal Medicine Physician nationwide →
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Common questions
What is Brian Hasselfeld, M.D.'s NPI number?
Brian Hasselfeld, M.D.'s National Provider Identifier (NPI) is 1700270360, issued on Mar 22, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Brian Hasselfeld, M.D. located?
The NPPES record lists a practice address at 1501 S Clinton St Ste 200, Baltimore, MD, 21224. Phone: (410) 522-9940. Providers update this record themselves, so call before visiting.
How can I verify Brian Hasselfeld, M.D.'s license?
NPPES lists Maryland license number D87400, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brian Hasselfeld, M.D. prescribe under Medicare Part D?
In 2024, Brian Hasselfeld, M.D. had 252 Medicare Part D claims for 29 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Brian Hasselfeld, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.