Richard Mermelstein, MD
Internal Medicine Physician · W Hempstead, NY
Richard Mermelstein, MD is an internal medicine physician with a practice address in W Hempstead, New York, and NPI 1629488440, issued on May 1, 2014. Check the license (New York 290500, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Richard Mermelstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 290500 NY
Self-reported in NPPES; status is on the state search - Practice location
- 225 Nassau Blvd # B, W Hempstead, NY 11552
- Phone
- (516) 656-1919
- Enumerated
- May 1, 2014
- Record last updated
- Sep 10, 2025
- Fax
- (833) 968-3330
- Medicare enrollment
- Enrolled (PECOS I20180403000375); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Verify Richard Mermelstein 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 290500Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average internal medicine physician in 2024
698 Medicare Part D claims for 131 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam25 claims
- Atorvastatin Calcium24 claims
- Azithromycin24 claims
- Amlodipine Besylate21 claims
- Methylprednisolone21 claims
- Amoxicillin-Clavulanate Potass19 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): 62.8 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: $2,015.06
82 payments; by number, the most common kind was food and beverage; the largest payer was Scilex 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 one group practice
- Primary Partnercare Physicians PLLCW Hempstead, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Richard Mermelstein among 12,067 internal medicine physician records in New York
Richard Mermelstein, MD 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 2014, is newer than 73% of them.
- NPI issued2014 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2014 · median 2002 among the 7,221 with a school on file
- Record last updated2025 · 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).
1 internal medicine physician record lists a practice address in W Hempstead
They are 1 of the 11 NPPES records with a practice address in W Hempstead, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in W Hempstead → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Phyllis Blacharsh, M.D.West Hempstead, NY 115521710026018
- Armando Forero, MDWest Hempstead, NY 115521992889927
- Debra Greenfield, M.D.West Hempstead, NY 115521558525964
- Constantine Haliasos, M.DWest Hempstead, NY 115521043216559
- Jingbo Liu, M.D.West Hempstead, NY 115521003938770
- Dan Lu, MDWest Hempstead, NY 115521811052293
- Mohammed Rahman, M.D.West Hempstead, NY 115521538154901
- Ann Marie Rode, DOWest Hempstead, NY 115521851502686
Common questions
What is Richard Mermelstein, MD's NPI number?
Richard Mermelstein, MD's National Provider Identifier (NPI) is 1629488440, issued on May 1, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Richard Mermelstein, MD located?
The NPPES record lists a practice address at 225 Nassau Blvd # B, W Hempstead, NY, 11552. Phone: (516) 656-1919. Providers update this record themselves, so call before visiting.
How can I verify Richard Mermelstein, MD's license?
NPPES lists New York license number 290500, 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 Richard Mermelstein, MD prescribe under Medicare Part D?
In 2024, Richard Mermelstein, MD had 698 Medicare Part D claims for 131 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Richard Mermelstein, MD's MIPS final score?
The 2023 MIPS final score is 62.8 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.