Doctor profile · Federal record
Dr. Marcellus Walker, MD
Internal Medicine Physician (CMS: Internal Medicine) · Internal Medicine Physician · Brooklyn, NY
- NPI 1003038274
- Accepts Medicare
- MIPS 76.5 / 100 · 2023
- 48 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2094 Pitkin Ave
Brooklyn, NY 112073509
(718) 240-0516
fax (718) 240-0564 - Mailing address
-
220 E 26Th St, Suite 1B
New York, NY 100102417
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- December 8, 2020
- Year of graduation
- 1978 — 48 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- New York #189578A · Pennsylvania #MD039838E
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1003038274. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
518
Distinct HCPCS
10
Medicare allowed
$38,926
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 147 | 135 | $104 | |
87426 |
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus | 94 | 90 | $35 | |
87804 |
Detection test by immunoassay with direct visual observation for influenza virus | 74 | 36 | $16 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 56 | 54 | $148 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 42 | 42 | $128 | |
81002 |
Urinalysis, manual test | 23 | 22 | $3 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 23 | 23 | $66 | |
87428 |
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | 18 | 18 | $30 | |
87880 |
Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | 14 | 14 | $16 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 14 | 14 | $193 |
In context: peer comparison
Among 393 peers in Brooklyn Internal Medicine Physician, average services per provider: 326. This provider delivers 1.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
242
Patients
219
Total drug cost
$4,868
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Azelastine Hcl | Generic | 69 | 58 | $1,768 |
| Fluticasone Propionate | Generic | 56 | 55 | $658 |
| Cefdinir | Generic | 33 | 33 | $689 |
| Doxycycline Monohydrate | Generic | 32 | 32 | $365 |
| Paxlovid (Eua) (Nirmatrelvir/Ritonavir) | Brand | 30 | 30 | $322 |
| Cefpodoxime Proxetil | Generic | 11 | 0 | $973 |
| Ciprofloxacin Hcl | Generic | 11 | 11 | $95 |
Frequently asked questions
What is Dr. Marcellus Walker's medical specialty?
Dr. Marcellus Walker practices Internal Medicine Physician in Brooklyn, NY.
Where does Dr. Marcellus Walker practice?
Dr. Marcellus Walker practices at 2094 Pitkin Ave, Brooklyn, NY 112073509. Office phone: 7182400516.
What is Dr. Marcellus Walker's NPI?
Dr. Marcellus Walker's National Provider Identifier (NPI) is 1003038274, issued by NPPES.
Does Dr. Marcellus Walker accept Medicare assignment?
Yes. Dr. Marcellus Walker accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marcellus Walker commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus (HCPCS 87426); Detection test by immunoassay with direct visual observation for influenza virus (HCPCS 87804). Source: CMS Medicare Physician & Other Practitioners file.