Active NPI 1003038274 Individual Practitioner Male Practitioner

Dr. Marcellus Andre Walker , MD

Internal Medicine • Brooklyn, NY

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Marcellus Walker, MD is a certified Internal Medicine practicing in Brooklyn, NY. With approximately 48 years of clinical experience since graduating from Loyola University Of Chicago, Stritch School Of Medicine in 1978, Dr. Walker delivers high-quality medical care to the local community at 2094 PITKIN AVE.

Dr. Walker is affiliated with City Medical Of Upper East Side Pllc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza, new patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2094 Pitkin Ave

Brooklyn, NY 112073509

Telephone 7182400516

Fax 7182400564

Associated Practice Facility / Clinic

🏢 New York City Health And Hospitals Corporation Facility NPI 1063577831

Medicare Profile & Education

Medical School

Loyola University Of Chicago, Stritch School Of Medicine

Graduation Year

1978

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Brooklyn, NY

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

48 Yrs +21.3 yrs vs City Avg

City Avg: 26.7 Yrs

State Avg: 29.4 Yrs

Regional Practice Density

1601 Specialists

Practicing in Brooklyn, NY (12979 Statewide)

Telehealth Adoption Rate

18.1% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

55.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Walker (48 Years) 48 Yrs

Brooklyn Specialty Average (26.7 Years) 26.7 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
99213 Established patient office or other outpatient visit, typically 15 minutes	270	237	$204.00	$101.50
87428 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza	98	93	$150.00	$68.88
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	55	53	$300.00	$142.59
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	43	43	$302.00	$125.40
81003 Automated urinalysis test	32	29	$8.00	$2.20
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	29	25	$123.00	$63.45
87880 Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	26	26	$30.00	$16.20
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	23	23	$100.00	$34.62
36415 Insertion of needle into vein for collection of blood sample	12	11	$8.00	$7.84
71046 X-ray of chest, 2 views	12	12	$110.00	$32.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	147	135	$204.65	$103.96
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	94	90	$100.00	$34.62
87804 Detection test by immunoassay with direct visual observation for influenza virus	74	36	$30.00	$16.22
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	56	54	$300.00	$147.53
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	42	42	$301.95	$128.44
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	23	23	$127.43	$65.98
81002 Urinalysis, manual test	23	22	$9.00	$3.41
87428 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza	18	18	$150.00	$30.32
87880 Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	14	14	$30.00	$16.20
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$458.00	$192.92
71046 X-ray of chest, 2 views	13	13	$110.00	$35.61

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	139	129	$100.00	$34.79
99213 Established patient office or other outpatient visit, typically 15 minutes	110	102	$204.87	$106.21
87804 Detection test by immunoassay with direct visual observation for influenza virus	54	27	$30.00	$16.24
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	41	36	$121.15	$67.05
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	40	40	$300.00	$148.62
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	26	26	$302.00	$133.18
81002 Urinalysis, manual test	15	15	$9.00	$3.43
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$458.00	$197.22
99202 New patient office or other outpatient visit, typically 20 minutes	12	12	$210.00	$86.78

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	144	136	$100.00	$35.33
99213 Established patient office or other outpatient visit, typically 15 minutes	77	75	$202.83	$106.45
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	61	56	$307.59	$152.03
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	40	40	$280.42	$130.14
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	37	37	$441.94	$195.26
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	22	$105.58	$65.41
81003 Automated urinalysis test	14	14	$18.48	$2.25
36415 Insertion of needle into vein for collection of blood sample	12	11	$17.85	$3.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	97	93	$209.86	$88.85
36415 Insertion of needle into vein for collection of blood sample	75	74	$18.90	$3.00
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	57	56	$307.25	$126.29
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	57	57	$303.71	$127.07
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	55	38	$110.50	$53.78
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	43	43	$100.00	$35.33
87804 Detection test by immunoassay with direct visual observation for influenza virus	42	21	$74.25	$16.22
99202 New patient office or other outpatient visit, typically 20 minutes	37	37	$217.44	$91.32
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	29	29	$467.28	$194.10
71046 X-ray of chest, 2 views	23	23	$110.07	$39.31
81003 Automated urinalysis test	22	21	$19.13	$2.22
93000 Routine ekg using at least 12 leads including interpretation and report	13	13	$49.75	$20.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	94	87	$211.56	$85.33
87804 Detection test by immunoassay with direct visual observation for influenza virus	89	45	$74.25	$16.22
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	80	$309.36	$123.61
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	56	56	$314.72	$122.54
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	45	45	$478.34	$188.56
81003 Automated urinalysis test	41	38	$19.13	$2.44
71046 X-ray of chest, 2 views	41	41	$110.07	$37.07
87880 Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	29	28	$74.50	$16.20
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	27	23	$117.49	$50.97
36415 Insertion of needle into vein for collection of blood sample	21	21	$18.75	$2.94
93000 Routine ekg using at least 12 leads including interpretation and report	15	15	$50.28	$19.91

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
90834 Psychotherapy, 45 minutes	264	22	$144.47	$88.49
90853 Group psychotherapy	184	17	$56.08	$26.64
99213 Established patient office or other outpatient visit, typically 15 minutes	88	85	$210.59	$82.93
87804 Detection test by immunoassay with direct visual observation for influenza virus	84	42	$73.65	$16.22
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	80	$307.29	$121.06
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	57	57	$312.68	$123.72
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$473.38	$187.07
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	38	33	$140.37	$50.05
71046 X-ray of chest, 2 views	34	34	$110.07	$34.56
81003 Automated urinalysis test	31	31	$19.32	$2.71
36415 Insertion of needle into vein for collection of blood sample	25	24	$19.20	$2.94
90791 Psychiatric diagnostic evaluation	19	18	$154.82	$137.51
93000 Routine ekg using at least 12 leads including interpretation and report	19	19	$50.15	$19.60

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	83	$307.16	$121.28
99213 Established patient office or other outpatient visit, typically 15 minutes	79	76	$209.80	$82.73
87804 Detection test by immunoassay with direct visual observation for influenza virus	78	39	$65.11	$11.75
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	64	64	$314.44	$122.80
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$471.36	$185.86
71020 X-ray of chest, 2 views, front and side	31	31	$82.30	$32.23
81003 Automated urinalysis test	26	26	$18.91	$3.02
87880 Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	20	20	$61.09	$11.75
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	19	14	$119.34	$48.78
G0008 Administration of influenza virus vaccine	18	18	$7.00	$6.86
90662 Influenza vaccine split virus, preservative free	17	17	$50.00	$48.05
36415 Insertion of needle into vein for collection of blood sample	16	16	$17.34	$2.94

Medical Specialties & State Licenses

CMS Verified: 2020-12-08

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License NY 189578A

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License PA MD039838E

Hospital & Practice Group Affiliations

City Medical Of Upper East Side Pllc

2248 31st St, Astoria, NY 111052714

Phone: 7185719192

Practice Associates & Co-Workers

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

13 Associated Practitioners

Lurline Dixon

Nurse Practitioner - Adult Health

NPI 1043396393

Anna Pitts-White , NP

Registered Nurse - General Practice

NPI 1063502854

Nurse Practitioner

Danielle Carrenard , CNP

Registered Nurse - Women's Health Care, Ambulatory

NPI 1073603866

Certified Nurse Practitioner

Aliceson Lucas , CNP

Registered Nurse - Ambulatory Care

NPI 1083704878

Certified Nurse Practitioner

Dr. Emmanuel Gelin , MD

Internal Medicine

NPI 1134236961

Doctor of Medicine (M.D.)

Dr. Jamil Akhtar , MD

Pediatrics - Pediatric Critical Care Medicine

NPI 1144294794

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active March 30, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location March 30, 2015

Registered at 2094 PITKIN AVE, BROOKLYN, NY 112073509 (Tel: 7182400516)

📍

Updated Business Mailing Address March 30, 2015

Registered at 220 E 26TH ST, SUITE 1B, NEW YORK, NY 100102417 (Tel: 9146712775)

👤

Provider Name / Credentials Updated March 30, 2015

Recorded as MARCELLUS WALKER, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 30, 2015

Internal Medicine (License #189578A in NY)

🟢

Initial NPI Registration & Enumeration May 03, 2007

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: 1003038274

Entity Type:

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

Enumeration Date: May 03, 2007

Last Update: December 08, 2020

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

220 E 26th St, Suite 1b

New York, NY 100102417

Phone: 9146712775

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.