Physician Profile
Unclaimed ProfileAbout WALKER
Marcellus Andre Walker, MD is a healthcare provider in Brooklyn, NY specialising in internal medicine. Marcellus trained at Loyola University of Chicago, Stritch School of Medicine, graduating in 1978.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Walker specialise in?
Dr. Walker is an internal medicine in Brooklyn, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Walker located?
Dr. Walker is listed at 2094 PITKIN AVE, Brooklyn, NY 11207. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Walker's phone number?
The number on file is (718) 240-0516. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Walker's NPI number?
Dr. Walker's National Provider Identifier is 1003038274. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Walker go to medical school?
Dr. Walker attended Loyola University of Chicago, Stritch School of Medicine, graduating in 1978. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Walker been practising?
Dr. Walker has 48 years experience. Calculated from a graduation year of 1978, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Walker do most often?
According to Medicare billing data, Dr. Walker performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of chest, 2 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Walker confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Walker. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (718) 240-0516
- Email not available
Practice Locations
2094 PITKIN AVE
Brooklyn, NY 11207
Procedures Most Often Billed to Medicare
600 services · 552 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
12 |
| X-ray of chest, 2 views | Imaging | 71046 |
12 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
270 |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | Lab test | 87428 |
98 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
55 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
43 |
| Automated urinalysis test | Lab test | 81003 |
32 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
29 |
| Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | Lab test | 87880 |
26 |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus | Lab test | 87426 |
23 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other internal medicines in Brooklyn 8
Same specialty, same city.
Trained at Loyola University of Chicago, Stritch School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1978 at Loyola University of Chicago, Stritch School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in NY who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.