Active NPI 1023036597 Individual Practitioner Male Practitioner

Dr. Daniel C Brennan , MD

Internal Medicine - Nephrology • Baltimore, MD

Professional Overview & Biography Verified Profile Summary

Dr. Daniel Brennan, MD is a certified Internal Medicine - Nephrology practicing in Baltimore, MD. With approximately 41 years of clinical experience since graduating from University Of Iowa, Rj & L Carver College Of Medicine in 1985, Dr. Brennan delivers high-quality medical care to the local community at 600 N WOLFE ST.

Dr. Brennan is affiliated with Johns Hopkins University and does not directly accept Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

600 N Wolfe St

Baltimore, MD 212870005

Telephone 4109555000

Associated Practice Facility / Clinic

🏢 Johns Hopkins University Facility NPI 1801891080

Medicare Profile & Education

Medical School

University Of Iowa, Rj & L Carver College Of Medicine

Graduation Year

1985

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Nephrology in Baltimore, MD

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

41 Yrs +17.0 yrs vs City Avg

City Avg: 24.0 Yrs

State Avg: 29.0 Yrs

Regional Practice Density

124 Specialists

Practicing in Baltimore, MD (348 Statewide)

Telehealth Adoption Rate

34.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

62.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Brennan (41 Years) 41 Yrs

Baltimore Specialty Average (24.0 Years) 24.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	109	101	$320.61	$147.66
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	100	32	$305.00	$121.09
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	98	92	$51.00	$16.64
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	11	11	$582.00	$176.81
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	11	11	$482.64	$186.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	249	70	$296.93	$125.45
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	42	42	$572.00	$183.89
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	41	16	$193.00	$83.91
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	38	33	$318.18	$151.68
99239 Hospital discharge day management, more than 30 minutes	12	12	$303.50	$106.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	356	101	$279.78	$108.65
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	71	20	$193.00	$76.00
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	67	65	$542.00	$210.50
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	40	32	$297.00	$153.05
99239 Hospital discharge day management, more than 30 minutes	24	21	$288.00	$111.99

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	464	125	$279.00	$109.99
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	130	56	$193.00	$75.40
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	68	65	$542.12	$211.00
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	29	27	$297.00	$159.06
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	21	21	$297.00	$158.61
90935 Hemodialysis procedure with physician evaluation	15	11	$425.00	$78.43
99238 Hospital discharge day management, 30 minutes or less	12	12	$194.00	$77.78
99239 Hospital discharge day management, more than 30 minutes	11	11	$288.00	$108.72

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	460	107	$279.00	$112.96
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	59	19	$193.00	$77.33
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	46	43	$542.00	$215.61
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	23	20	$297.00	$120.63
99238 Hospital discharge day management, 30 minutes or less	19	19	$194.00	$76.15
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	16	12	$297.00	$121.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	529	114	$279.53	$108.42
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	60	58	$297.00	$115.16
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	46	12	$193.00	$75.31
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	39	37	$542.00	$213.51

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	672	130	$279.00	$110.19
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	67	67	$301.66	$116.95
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	56	24	$193.00	$77.07
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	54	52	$542.15	$211.49
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	13	$366.00	$144.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	128	123	$791.44	$135.19
81003 Automated urinalysis test	122	115	$13.00	$2.72
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	70	35	$482.74	$71.31
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	59	24	$717.12	$101.64
99231 Follow-up hospital inpatient care per day, typically 15 minutes	41	23	$334.83	$37.25
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	25	25	$1044.44	$200.87
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	21	$511.33	$105.21
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$636.82	$135.36

Medical Specialties & State Licenses

Internal Medicine - Nephrology Primary Specialty

NUCC Taxonomy Code: 207RN0300X

State License MD D83543

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

121595700 (MD)

Hospital & Practice Group Affiliations

Johns Hopkins University

600 N Wolfe St, Baltimore, MD 212870005

Phone: 4105024340

Johns Hopkins University

600 N Wolf St, Baltimore, MD 212870005

Phone: 4109555000

Johns Hopkins University

601 N Caroline St, Baltimore, MD 212870006

Phone: 4109555080

Johns Hopkins University

5601 Lloch Raven Blvd, Baltimore, MD 212392945

Phone: 4434444714

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Dr. Vanessa Vasquez , MD

Emergency Medicine

NPI 1003131749

Doctor of Medicine (M.D.)

Dr. Suman Paul , MBBS, PhD

Internal Medicine - Medical Oncology

NPI 1003253360

Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.), Doctor of Philosophy (Ph.D.)

Dr. Mian Khalid , MD

Internal Medicine - Gastroenterology

NPI 1003310152

Doctor of Medicine (M.D.)

Jeff Ehresman

Student in an Organized Health Care Education/Training Program

NPI 1003322801

Dr. Kaitlyn Frazier , MD

Otolaryngology

NPI 1003347246

Doctor of Medicine (M.D.)

Evan Fox

Radiology - Neuroradiology

NPI 1003437583

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events

✅

NPI Profile Active July 21, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location July 21, 2017

Registered at 600 N WOLFE ST, BALTIMORE, MD 212870005 (Tel: 4109555000)

📍

Updated Business Mailing Address July 21, 2017

Registered at 9910 FRANKLIN SQUARE DR STE 2110, BALTIMORE, MD 212364902 (Tel: (410) 933-6421)

👤

Provider Name / Credentials Updated July 21, 2017

Recorded as DANIEL BRENNAN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 21, 2017

Internal Medicine (License #D83543 in MD)

✅

NPI Profile Active November 14, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location November 14, 2016

Registered at 4921 PARKVIEW PL, 5TH FLOOR SUITE C, SAINT LOUIS, MO 631101032 (Tel: 3143627603)

📍

Updated Business Mailing Address November 14, 2016

Registered at 660 S EUCLID AVE, C B 8126, SAINT LOUIS, MO 631101010 (Tel: 3143627603)

👤

Provider Name / Credentials Updated November 14, 2016

Recorded as DANIEL BRENNAN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 14, 2016

Internal Medicine (License #103810 in MO)

🟢

Initial NPI Registration & Enumeration July 17, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1023036597

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: July 17, 2006

Last Update: July 21, 2022

Sole Proprietor: No

Update or Correct Profile

Mailing Address

9910 Franklin Square Dr Ste 2110

Baltimore, MD 212364902

Phone: 4109336421

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.