C Ronald Mackenzie, M.D.
Specialist · New York, NY
C Ronald Mackenzie, M.D. is a specialist with a practice address in New York, New York, and NPI 1750344289, issued on Apr 7, 2006. Check the license (New York 156880, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- C Ronald Mackenzie
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 156880 NY
Self-reported in NPPES; status is on the state search - Practice location
- 535 E 70TH St, New York, NY 10021
- Phone
- (212) 606-1669
- Enumerated
- Apr 7, 2006
- Record last updated
- Apr 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (212) 774-2229
- Medicaid ID
- 00808439 NY
- Medicare enrollment
- Enrolled (PECOS I20101209000937); may accept Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1983
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 22,636 in New York → Look up another NPI →
Also registered at 535 E 70TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify C Ronald Mackenzie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 156880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average specialist in 2024
3,866 Medicare Part D claims for 424 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. 51 claims were for opioids.
Most prescribed
- Atorvastatin Calcium308 claims
- Amlodipine Besylate177 claims
- Rosuvastatin Calcium166 claims
- Levothyroxine Sodium143 claims
- Meloxicam137 claims
- Prednisone113 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $120.32
1 payment: food and beverage; the largest payer was Heron Therapeutics, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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 2 group practices
- New York Society For The Relief OF Ruptured And Crippled MaintainingNew York, NY
- Select PT, OT And Slp Rehabilitation NY, PLLCHudson, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
C Ronald Mackenzie among 22,636 specialist records in New York
C Ronald Mackenzie, M.D. is one of 22,636 specialist records with a practice address in New York. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 92% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 4% of these records are
- Graduated1983 · median 1990 among the 943 with a school on file
- Record last updated2021 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,896 specialist records list a practice address in New York
They are 1,896 of the 98,468 NPPES records with a practice address in New York, and 22,636 specialist records in New York.
All 22,636 in New York → Every provider in New York → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Dalit Ashany, M.D.New York, NY 100211407819931
- Barbara Braffman, M.D.New York, NY 100211225001662
- Keith Brunckhorst, M.D.New York, NY 100211053381186
- Doris Day, MDNew York, NY 100211851384028
- William Grace, M.D.New York, NY 100211578565610
- Gwen Harris, MDNew York, NY 100211285607614
- Clyde Hershan, M.D.New York, NY 100211568435956
- H. Jaliman, M.D.New York, NY 100211376505453
Common questions
What is C Ronald Mackenzie, M.D.'s NPI number?
C Ronald Mackenzie, M.D.'s National Provider Identifier (NPI) is 1750344289, issued on Apr 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is C Ronald Mackenzie, M.D. located?
The NPPES record lists a practice address at 535 E 70TH St, New York, NY, 10021. Phone: (212) 606-1669. Providers update this record themselves, so call before visiting.
How can I verify C Ronald Mackenzie, M.D.'s license?
NPPES lists New York license number 156880, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does C Ronald Mackenzie, M.D. prescribe under Medicare Part D?
In 2024, C Ronald Mackenzie, M.D. had 3,866 Medicare Part D claims for 424 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is C Ronald Mackenzie, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.