Sherman Mark Klein, M.D.
Internal Medicine Physician · Flushing, NY
Sherman Mark Klein, M.D. is an internal medicine physician with a practice address in Flushing, New York, and NPI 1558340992, issued on Jan 13, 2006. Check the license (New York 162551, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Sherman Mark Klein
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 162551 NY
Self-reported in NPPES; status is on the state search - Practice location
- 14601 45TH Ave, Flushing, NY 11355
- Phone
- (718) 353-1010
- Enumerated
- Jan 13, 2006
- Record last updated
- Nov 26, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090616000466); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 14601 45TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sherman Mark Klein 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 162551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,081 Medicare Part D claims for 170 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 28 claims were for opioids.
Most prescribed
- Amlodipine Besylate91 claims
- Metoprolol Succinate84 claims
- Metformin Hcl81 claims
- Atorvastatin Calcium78 claims
- Losartan Potassium70 claims
- Allopurinol62 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): 89.5 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: $368.31
3 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Flushing Hospital And Medical CenterFlushing, NY
- Tjh Medical Services PCKew Gardens, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sherman Mark Klein among 12,067 internal medicine physician records in New York
Sherman Mark Klein, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1982 · median 2002 among the 7,221 with a school on file
- Record last updated2008 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
242 internal medicine physician records list a practice address in Flushing
They are 242 of the 6,354 NPPES records with a practice address in Flushing, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Flushing → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Vincent Chua, M.D.Flushing, NY 113551841278579
- Jiangping GanFlushing, NY 113551134199920
- Mohinder Gupta, MDFlushing, NY 113551659337285
- Huajun Huang, M.D.Flushing, NY 113551033172143
- Yuan Li, MDFlushing, NY 113551841261062
Common questions
What is Sherman Mark Klein, M.D.'s NPI number?
Sherman Mark Klein, M.D.'s National Provider Identifier (NPI) is 1558340992, issued on Jan 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sherman Mark Klein, M.D. located?
The NPPES record lists a practice address at 14601 45TH Ave, Flushing, NY, 11355. Phone: (718) 353-1010. Providers update this record themselves, so call before visiting.
How can I verify Sherman Mark Klein, M.D.'s license?
NPPES lists New York license number 162551, 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 Sherman Mark Klein, M.D. prescribe under Medicare Part D?
In 2024, Sherman Mark Klein, M.D. had 2,081 Medicare Part D claims for 170 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Sherman Mark Klein, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.5 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.