Keith Mackay, PA-C
Orthopaedic Surgery Physician · South Weymouth, MA
Keith Mackay, PA-C is an orthopaedic surgery physician with a practice address in South Weymouth, Massachusetts, and NPI 1174184477, issued on Jun 26, 2019. Check the license on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Keith Mackay
- Credential
- PA-C
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 024838 NY
Self-reported in NPPES; status is on the state search - Practice location
- 55 Fogg RD, South Weymouth, MA 02190
- Phone
- (781) 792-4121
- Enumerated
- Jun 26, 2019
- Record last updated
- Jan 18, 2023
- Medicare enrollment
- Enrolled (PECOS I20230202001620); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 692 in Massachusetts → Look up another NPI →
Also registered at 55 Fogg RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anjali Andalkar, M.D.Anatomic Pathology & Clinical Pathology Physician1225005234
- Shaheen AndreasPediatric Emergency Medicine (Pediatrics) Physician1407388614
Verify Keith Mackay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
151 Medicare Part D claims for 62 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 58 claims were for opioids.
Most prescribed
- Oxycodone Hcl48 claims
- Ondansetron Odt47 claims
- Celecoxib17 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): 82.8 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).
Industry payments in 2024: $30.66
1 payment: food and beverage; the largest payer was Solventum Corporation. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Coastal Medical AssociatesWeymouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keith Mackay among 692 orthopaedic surgery physician records in Massachusetts
Keith Mackay, PA-C is one of 692 orthopaedic surgery physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2019 · median 2004 among the 441 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Massachusetts
There are 692 orthopaedic surgery physician records in Massachusetts.
All 692 in Massachusetts → Every provider in South Weymouth → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- David Heller, M.D.South Weymouth, MA 021901699761825
- Joseph Chase, M.D.Weymouth, MA 021881578559597
- George McManama, M.D.Milton, MA 021861952364184
- Andrew Chapman, MDBraintree, MA 021841144214776
- Michael Elman, M.D.Braintree, MA 021841972770998
- Robert McGuirk, MDBraintree, MA 021841194747121
- David Winnick, M.D.Braintree, MA 021841538106737
- Christian Andersen, MDStoneham, MA 021801982698999
Common questions
What is Keith Mackay, PA-C's NPI number?
Keith Mackay, PA-C's National Provider Identifier (NPI) is 1174184477, issued on Jun 26, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Keith Mackay, PA-C located?
The NPPES record lists a practice address at 55 Fogg RD, South Weymouth, MA, 02190. Phone: (781) 792-4121. Providers update this record themselves, so call before visiting.
How can I verify Keith Mackay, PA-C's license?
Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Keith Mackay, PA-C prescribe under Medicare Part D?
In 2024, Keith Mackay, PA-C had 151 Medicare Part D claims for 62 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Keith Mackay, PA-C's MIPS final score?
The 2023 MIPS final score is 82.8 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.