William Maffitt McDonald, MD
Geriatric Medicine (Internal Medicine) Physician · New York, NY
William Maffitt McDonald, MD is a geriatric medicine (internal medicine) physician with a practice address in New York, New York, and NPI 1235629197, issued on May 16, 2018. Check the license (New York 324157, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- William Maffitt McDonald
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License numbers
- 324157 NY
67609 CT
Self-reported in NPPES; status is on the state search - Practice location
- 935 Park Ave, New York, NY 10028
- Phone
- (646) 883-6762
- Enumerated
- May 16, 2018
- Record last updated
- Jul 4, 2025
- Fax
- (646) 687-5880
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 508 in New York → Look up another NPI →
Also registered at 935 Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kate McGilloway, DMDOrthodontics and Dentofacial Orthopedics Dentistry1205101383
Verify William Maffitt McDonald 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 324157Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
416 Medicare Part D claims for 82 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium28 claims
- Amlodipine Besylate27 claims
- Losartan Potassium20 claims
- Rosuvastatin Calcium18 claims
- Metformin Hcl Er13 claims
- Omeprazole13 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
William Maffitt McDonald among 508 geriatric medicine (internal medicine) physician records in New York
William Maffitt McDonald, MD is one of 508 geriatric medicine (internal medicine) physician records with a practice address in New York. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 89% of them.
- NPI issued2018 · 89% of these records are older, 10% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 54% of these records are
- Record last updated2025 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in New York
There are 508 geriatric medicine (internal medicine) physician records in New York.
All 508 in New York → Every provider in New York → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Shahla Baharlou, MDNew York, NY 100291598725921
- Patricia Bloom, MDNew York, NY 100291699741074
- Eileen Callahan, MDNew York, NY 100291396711776
- Christine Chang, MDNew York, NY 100291477529857
- Audrey Chun, MDNew York, NY 100291831166271
- Helen Fernandez, MDNew York, NY 100291033185418
- Reena Karani, MDNew York, NY 100291427024702
- Beatriz Korc-Grodzicki, MDNew York, NY 100291336115617
Common questions
What is William Maffitt McDonald, MD's NPI number?
William Maffitt McDonald, MD's National Provider Identifier (NPI) is 1235629197, issued on May 16, 2018. An NPI identifies a provider in billing; it is not a license.
Where is William Maffitt McDonald, MD located?
The NPPES record lists a practice address at 935 Park Ave, New York, NY, 10028. Phone: (646) 883-6762. Providers update this record themselves, so call before visiting.
How can I verify William Maffitt McDonald, MD's license?
NPPES lists New York license number 324157, 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 William Maffitt McDonald, MD prescribe under Medicare Part D?
In 2024, William Maffitt McDonald, MD had 416 Medicare Part D claims for 82 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.
What is William Maffitt McDonald, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.