Marcellus Andre Walker, MD
Internal Medicine Physician · Brooklyn, NY
Marcellus Andre Walker, MD is an internal medicine physician with a practice address in Brooklyn, New York, and NPI 1003038274, issued on May 3, 2007. Check the license (New York 189578A, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marcellus Andre Walker
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 189578A NY
MD039838E PA
Self-reported in NPPES; status is on the state search - Practice location
- 2094 Pitkin Ave, Brooklyn, NY 11207
- Phone
- (718) 240-0516
- Enumerated
- May 3, 2007
- Record last updated
- Dec 8, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (718) 240-0564
- Medicare enrollment
- Enrolled (PECOS I20110407000812); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1978
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 2094 Pitkin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samia AhmedStudent in an Organized Health Care Education/Training Program1538091756
- Jamil Akhtar, M.DPediatric Critical Care Medicine Physician1144294794
- Claudette Awer, CDNNutritionist1770190076
- Lorie Bartley, MDObstetrics & Gynecology Physician1245202977
- Jean Bataille, RPHPharmacist1831414721
- Anny Bonilla, LCSWClinical Social Worker1477275717
Verify Marcellus Andre Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 189578ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average internal medicine physician in 2024
722 Medicare Part D claims for 361 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Azelastine Hcl129 claims
- Doxycycline Monohydrate71 claims
- Fluticasone Propionate58 claims
- Cefdinir43 claims
- Paxlovid36 claims
- Azithromycin24 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): 76.5 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).
Bills Medicare through one group practice
- City Medical OF Upper East Side PLLCAstoria, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcellus Andre Walker among 12,067 internal medicine physician records in New York
Marcellus Andre Walker, MD is one of 12,067 internal medicine physician records with a practice address in New York. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1978 · median 2002 among the 7,221 with a school on file
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,497 internal medicine physician records list a practice address in Brooklyn
They are 1,497 of the 64,057 NPPES records with a practice address in Brooklyn, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Brooklyn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Azuka Anyoku, MDBrooklyn, NY 112071386747681
- Angel Gonzalez, MDBrooklyn, NY 112071528151735
- Richard Holmes, MDBrooklyn, NY 112071225121452
- Mohammed KhanBrooklyn, NY 112071710950662
- Jesireno Lumbab, M.D.Brooklyn, NY 112071255328043
- Marino Mesidor, M.D.Brooklyn, NY 112071518943786
- Ei Khine Moe, MDBrooklyn, NY 112071033601372
- Emilie O'NeillBrooklyn, NY 112071932555943
Common questions
What is Marcellus Andre Walker, MD's NPI number?
Marcellus Andre Walker, MD's National Provider Identifier (NPI) is 1003038274, issued on May 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marcellus Andre Walker, MD located?
The NPPES record lists a practice address at 2094 Pitkin Ave, Brooklyn, NY, 11207. Phone: (718) 240-0516. Providers update this record themselves, so call before visiting.
How can I verify Marcellus Andre Walker, MD's license?
NPPES lists New York license number 189578A, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marcellus Andre Walker, MD prescribe under Medicare Part D?
In 2024, Marcellus Andre Walker, MD had 722 Medicare Part D claims for 361 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Marcellus Andre Walker, MD's MIPS final score?
The 2023 MIPS final score is 76.5 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.