Meggan Mackay, MD
Rheumatology Physician · Manhasset, NY
Meggan Mackay, MD is a rheumatology physician with a practice address in Manhasset, New York, and NPI 1164542197, issued on Mar 31, 2007. Check the license (New York 196738, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Meggan Mackay
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 196738 NY
Self-reported in NPPES; status is on the state search - Practice location
- 350 Community Dr, Manhasset, NY 11030
- Phone
- (516) 562-3838
- Enumerated
- Mar 31, 2007
- Record last updated
- Jul 22, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (516) 562-2537
- Medicare enrollment
- Enrolled (PECOS I20080305000587); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1991
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 599 in New York → Look up another NPI →
Also registered at 350 Community Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cynthia Aranow, M.D.Rheumatology Physician1710023536
- Latoya CodouganStudent in an Organized Health Care Education/Training Program1538555305
- Giovanni Franchin, M.D.Rheumatology Physician1942252127
Verify Meggan Mackay 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 196738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average rheumatology physician in 2024
746 Medicare Part D claims for 48 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 13 claims were for opioids.
Most prescribed
- Hydroxychloroquine Sulfate171 claims
- Prednisone72 claims
- Benlysta47 claims
- Leflunomide33 claims
- Ibuprofen31 claims
- Mycophenolate Mofetil31 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): 91.3 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).
Bills Medicare through one group practice
- North Shore-Lij Medical PCManhasset, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Meggan Mackay among 599 rheumatology physician records in New York
Meggan Mackay, MD is one of 599 rheumatology physician records with a practice address in New York. 85% 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 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1991 · median 2003 among the 425 with a school on file
- Record last updated2008 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in New York
There are 599 rheumatology physician records in New York.
All 599 in New York → Every provider in Manhasset → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Cynthia Aranow, M.D.Manhasset, NY 110301710023536
- Nicholas Chiorazzi, MDManhasset, NY 110301326108481
- Betty Diamond, MDManhasset, NY 110301184744062
- Zeba FaroquiManhasset, NY 110301326426966
- Jevon Fragoso, MDManhasset, NY 110301700345634
- Giovanni Franchin, M.D.Manhasset, NY 110301942252127
- Peter GregersenManhasset, NY 110301417073263
- Can HuManhasset, NY 110301588160709
Common questions
What is Meggan Mackay, MD's NPI number?
Meggan Mackay, MD's National Provider Identifier (NPI) is 1164542197, issued on Mar 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Meggan Mackay, MD located?
The NPPES record lists a practice address at 350 Community Dr, Manhasset, NY, 11030. Phone: (516) 562-3838. Providers update this record themselves, so call before visiting.
How can I verify Meggan Mackay, MD's license?
NPPES lists New York license number 196738, 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 Meggan Mackay, MD prescribe under Medicare Part D?
In 2024, Meggan Mackay, MD had 746 Medicare Part D claims for 48 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Meggan Mackay, MD's MIPS final score?
The 2023 MIPS final score is 91.3 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.