Marissa Danielle Rybstein, M.D.
Hematology (Internal Medicine) Physician · New York, NY
Marissa Danielle Rybstein, M.D. is a hematology (internal medicine) physician with a practice address in New York, New York, and NPI 1447593132, issued on Apr 1, 2013. Check the license (New York 283721, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marissa Danielle Rybstein
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 283721 NY
Self-reported in NPPES; status is on the state search - Practice location
- 520 E 70TH St # 341, New York, NY 10021
- Phone
- (212) 746-2061
- Enumerated
- Apr 1, 2013
- Record last updated
- Sep 12, 2022
- Fax
- (212) 746-8866
- Medicare enrollment
- Enrolled (PECOS I20190903001528); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 161 in New York → Look up another NPI →
Also registered at 520 E 70TH St # 341
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ghaith Abu Zeinah, M.D.Hematology & Oncology Physician1174962146
- Hassenna Ahmadi, RPA-CPhysician Assistant1801077508
- Alexandra Andrei, PAMedical Physician Assistant1699866012
- Juliet Barker, MBBSHematology & Oncology Physician1497726426
- Sheenu Batra, P.A.Medical Physician Assistant1912157546
- Kristen Benedetto, PAPhysician Assistant1629533203
Verify Marissa Danielle Rybstein 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 283721Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
478 Medicare Part D claims for 94 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims. 33 claims were for opioids.
Most prescribed
- Ondansetron Hcl49 claims
- Eliquis48 claims
- Oxycodone Hcl25 claims
- Dexamethasone23 claims
- Gabapentin23 claims
- Tagrisso21 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): 84.5 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).
Bills Medicare through one group practice
- New York UniversityMineola, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa Danielle Rybstein among 161 hematology (internal medicine) physician records in New York
Marissa Danielle Rybstein, M.D. is one of 161 hematology (internal medicine) physician records with a practice address in New York. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 80% of them.
- NPI issued2013 · 80% of these records are older, 19% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2001 among the 92 with a school on file
- Record last updated2022 · 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 207RH0000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in New York
There are 161 hematology (internal medicine) physician records in New York.
All 161 in New York → Every provider in New York → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Ellin Berman, MDNew York, NY 100211083685861
- Hugo Castro-Malaspina, MDNew York, NY 100211598703407
- Barry Coller, M.D.New York, NY 100211043227416
- Richard Furman, MDNew York, NY 100211770670861
- Hani Hassoun, MDNew York, NY 100211285605220
- Gerard Hellman, MDNew York, NY 100211700852647
- Ann Jakubowski, MDNew York, NY 100211467555342
- Diana Lake, MDNew York, NY 100211346211380
Common questions
What is Marissa Danielle Rybstein, M.D.'s NPI number?
Marissa Danielle Rybstein, M.D.'s National Provider Identifier (NPI) is 1447593132, issued on Apr 1, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Danielle Rybstein, M.D. located?
The NPPES record lists a practice address at 520 E 70TH St # 341, New York, NY, 10021. Phone: (212) 746-2061. Providers update this record themselves, so call before visiting.
How can I verify Marissa Danielle Rybstein, M.D.'s license?
NPPES lists New York license number 283721, 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 Marissa Danielle Rybstein, M.D. prescribe under Medicare Part D?
In 2024, Marissa Danielle Rybstein, M.D. had 478 Medicare Part D claims for 94 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. Part D covers Medicare prescriptions only.
What is Marissa Danielle Rybstein, M.D.'s MIPS final score?
The 2023 MIPS final score is 84.5 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.