Mark H. Gardenswartz, M.D.
Nephrology Physician · New York, NY
Mark H. Gardenswartz, M.D. is a nephrology physician with a practice address in New York, New York, and NPI 1326063215, issued on Jul 13, 2006. Check the license (New York 128389, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark H. Gardenswartz
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 128389 NY
Self-reported in NPPES; status is on the state search - Practice location
- 110 E 59TH St, New York, NY 10022
- Phone
- (212) 583-2930
- Enumerated
- Jul 13, 2006
- Record last updated
- Sep 16, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040715000594); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 1975
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,049 in New York → Look up another NPI →
Also registered at 110 E 59TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gayle Atlas, DOAnesthesiology Physician1598849424
- Israel Berkowitz, MDCardiovascular Disease Physician1124094594
- Yuliya Borik, AU.D.Audiologist1669922597
- Carmen Bosch, M.D.Internal Medicine Physician1750451738
Verify Mark H. Gardenswartz 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 128389Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average nephrology physician in 2024
1,471 Medicare Part D claims for 253 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Amlodipine Besylate86 claims
- Metoprolol Succinate72 claims
- Furosemide71 claims
- Losartan Potassium65 claims
- Atorvastatin Calcium52 claims
- Levothyroxine Sodium50 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 PCNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark H. Gardenswartz among 1,049 nephrology physician records in New York
Mark H. Gardenswartz, M.D. is one of 1,049 nephrology 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 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 47% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1975 · median 1999 among the 764 with a school on file
- Record last updated2007 · 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 207RN0300X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in New York
There are 1,049 nephrology physician records in New York.
All 1,049 in New York → Every provider in New York → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- John Rodman, MDNew York, NY 100221942361191
- Joshua Schwimmer, MDNew York, NY 100221366499873
- Richard Ames, MDNew York, NY 100231225111958
- Narcis Aron, MDNew York, NY 100231265402374
- Irina Barash, M.D.New York, NY 100211114122553
- Matthias Bergmann, MDNew York, NY 100211568088151
- Nathaniel Berman, M.D.New York, NY 100211285891242
- Andrew Bohmart, M.D.New York, NY 100211841403300
Common questions
What is Mark H. Gardenswartz, M.D.'s NPI number?
Mark H. Gardenswartz, M.D.'s National Provider Identifier (NPI) is 1326063215, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark H. Gardenswartz, M.D. located?
The NPPES record lists a practice address at 110 E 59TH St, New York, NY, 10022. Phone: (212) 583-2930. Providers update this record themselves, so call before visiting.
How can I verify Mark H. Gardenswartz, M.D.'s license?
NPPES lists New York license number 128389, 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 Mark H. Gardenswartz, M.D. prescribe under Medicare Part D?
In 2024, Mark H. Gardenswartz, M.D. had 1,471 Medicare Part D claims for 253 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Mark H. Gardenswartz, M.D.'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.