Daniel C. Brennan, MD
Nephrology Physician · Baltimore, MD
Daniel C. Brennan, MD is a nephrology physician with a practice address in Baltimore, Maryland, and NPI 1023036597, issued on Jul 17, 2006. Check the license (Maryland D83543, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Daniel C. Brennan
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- D83543 MD
Self-reported in NPPES; status is on the state search - Practice location
- 600 N Wolfe St, Baltimore, MD 21287
- Phone
- (410) 955-5000
- Enumerated
- Jul 17, 2006
- Record last updated
- Jul 21, 2022
- Medicaid ID
- 121595700 MD
- Medicare enrollment
- Enrolled (PECOS I20170814000262); may accept Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 337 in Maryland → Look up another NPI →
Also registered at 600 N Wolfe St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Daniel C. Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D83543Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average nephrology physician in 2024
949 Medicare Part D claims for 264 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Prednisone143 claims
- Atorvastatin Calcium115 claims
- Carvedilol57 claims
- Amlodipine Besylate54 claims
- Losartan Potassium48 claims
- Tamsulosin Hcl45 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): 74.4 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).
Industry payments in 2024: $53,882.29
22 payments; by number, the most common kind was food and beverage; the largest payer was Sanofi-Aventis U.S. LLC. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Johns Hopkins UniversityBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel C. Brennan among 337 nephrology physician records in Maryland
Daniel C. Brennan, MD is one of 337 nephrology physician records with a practice address in Maryland. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 48% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1985 · median 2001 among the 232 with a school on file
- Record last updated2022 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Maryland
There are 337 nephrology physician records in Maryland.
All 337 in Maryland → Every provider in Baltimore → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Nada Alachkar, M.D.Baltimore, MD 212871164480653
- Mohamed Atta, M.D.Baltimore, MD 212871417912262
- Michael Choi, M.D.Baltimore, MD 212871487606372
- Michelle Estrella, M.D.Baltimore, MD 212871932152196
- Derek Fine, M.D.Baltimore, MD 212871174559868
- Gregory Germino, M.D.Baltimore, MD 212871659319937
- Morgan Grams, M.D.Baltimore, MD 212871780876722
- Melanie Haroun, M.D.Baltimore, MD 212871891745949
Common questions
What is Daniel C. Brennan, MD's NPI number?
Daniel C. Brennan, MD's National Provider Identifier (NPI) is 1023036597, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel C. Brennan, MD located?
The NPPES record lists a practice address at 600 N Wolfe St, Baltimore, MD, 21287. Phone: (410) 955-5000. Providers update this record themselves, so call before visiting.
How can I verify Daniel C. Brennan, MD's license?
NPPES lists Maryland license number D83543, 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 Daniel C. Brennan, MD prescribe under Medicare Part D?
In 2024, Daniel C. Brennan, MD had 949 Medicare Part D claims for 264 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Daniel C. Brennan, MD's MIPS final score?
The 2023 MIPS final score is 74.4 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.