Stephen A. Klein, M.D.
Internal Medicine Physician · West Nyack, NY
Stephen A. Klein, M.D. is an internal medicine physician with a practice address in West Nyack, New York, and NPI 1831257872, issued on Dec 4, 2006. Check the license (New York 151797, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Stephen A. Klein
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 151797 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2 Centerock RD, West Nyack, NY 10994
- Phone
- (845) 703-6999
- Enumerated
- Dec 4, 2006
- Record last updated
- Oct 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (845) 703-6297
- Medicare enrollment
- Enrolled (PECOS I20110526000002); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 2 Centerock RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ramy Abukwaik, MDInternal Medicine Physician1093392375
- Sami Ahmad, M.D., M.S,Obstetrics & Gynecology Physician1619258381
- Oladipo Alao, MDInfectious Disease Physician1265539993
- Alfred Becker, MDRheumatology Physician1649271255
- Geraldine Brodie, FNPFamily Nurse Practitioner1720649395
- Michael Broker, MDCardiovascular Disease Physician1619473196
Verify Stephen A. 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 151797Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average internal medicine physician in 2024
916 Medicare Part D claims for 158 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Atorvastatin Calcium157 claims
- Amlodipine Besylate93 claims
- Allopurinol55 claims
- Levothyroxine Sodium44 claims
- Rosuvastatin Calcium40 claims
- Enalapril Maleate27 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.
Industry payments in 2024: $320.20
15 payments; by number, the most common kind was food and beverage; the largest payer was Amgen 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 one group practice
- Rockland Endocrine And Diabetes Services, P.C.Suffern, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen A. Klein among 12,067 internal medicine physician records in New York
Stephen A. 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
- Graduated1980 · median 2002 among the 7,221 with a school on file
- Record last updated2020 · 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).
14 internal medicine physician records list a practice address in West Nyack
They are 14 of the 439 NPPES records with a practice address in West Nyack, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in West Nyack → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ramy Abukwaik, MDWest Nyack, NY 109941093392375
- Lisa Ferrara, M.D.West Nyack, NY 109941861563736
- James Gurniak, M.D.West Nyack, NY 109941851420897
- Roy Hammonds, RPA-CWest Nyack, NY 109941649368887
- Mary Leahy, MDWest Nyack, NY 109941215921283
- Dean Miller, M.D.West Nyack, NY 109941568416451
- Henry Okere, MDWest Nyack, NY 109941366455248
- Ghousia Pasha, M.D.West Nyack, NY 109941518058940
Common questions
What is Stephen A. Klein, M.D.'s NPI number?
Stephen A. Klein, M.D.'s National Provider Identifier (NPI) is 1831257872, issued on Dec 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen A. Klein, M.D. located?
The NPPES record lists a practice address at 2 Centerock RD, West Nyack, NY, 10994. Phone: (845) 703-6999. Providers update this record themselves, so call before visiting.
How can I verify Stephen A. Klein, M.D.'s license?
NPPES lists New York license number 151797, 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 Stephen A. Klein, M.D. prescribe under Medicare Part D?
In 2024, Stephen A. Klein, M.D. had 916 Medicare Part D claims for 158 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.