Olga N. Kozyreva, M.D.
Hematology (Internal Medicine) Physician · Boston, MA
Olga N. Kozyreva, M.D. is a hematology (internal medicine) physician with a practice address in Boston, Massachusetts, and NPI 1487758348, issued on Sep 12, 2006. Check the license (Massachusetts 230270, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Olga N. Kozyreva
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 230270 MA
Self-reported in NPPES; status is on the state search - Practice location
- 736 Cambrige Street, Boston, MA 02135
- Phone
- (617) 789-2903
- Enumerated
- Sep 12, 2006
- Record last updated
- Feb 13, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (617) 789-2064
- Medicare enrollment
- Enrolled (PECOS I20080212000156); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 117 in Massachusetts → Look up another NPI →
Verify Olga N. Kozyreva in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 230270Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average hematology (internal medicine) physician in 2024
574 Medicare Part D claims for 132 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. 63 claims were for opioids.
Most prescribed
- Mirtazapine32 claims
- Eliquis30 claims
- Oxycodone Hcl30 claims
- Abiraterone Acetate24 claims
- Prednisone24 claims
- Levothyroxine Sodium22 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.
Bills Medicare through one group practice
- Dana-Farber Cancer Institute, Inc.Boston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Olga N. Kozyreva among 117 hematology (internal medicine) physician records in Massachusetts
Olga N. Kozyreva, M.D. is one of 117 hematology (internal medicine) physician records with a practice address in Massachusetts. 77% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 50% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1993 · median 2006 among the 77 with a school on file
- Record last updated2019 · 43% 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 Massachusetts 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 Massachusetts
There are 117 hematology (internal medicine) physician records in Massachusetts.
All 117 in Massachusetts → Every provider in Boston → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Leslie Martin, M.D.Brighton, MA 021351124012299
- Daniel Deykin, M.D.Jamaica Plain, MA 021301871614008
- Abraham Zimelman, M.D.Boston, MA 021301518062959
- Burt Alan Adelman, M.D.Cambridge, MA 021421922066158
- Georgette Jeanty, M.D.Mattapan, MA 021261164576658
- Douglas Faller, M.D.Boston, MA 021181285699439
- Lillian McMahon, M.D.Boston, MA 021181801873542
- Duyen Ngo, M.D.Boston, MA 021181922193549
Common questions
What is Olga N. Kozyreva, M.D.'s NPI number?
Olga N. Kozyreva, M.D.'s National Provider Identifier (NPI) is 1487758348, issued on Sep 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Olga N. Kozyreva, M.D. located?
The NPPES record lists a practice address at 736 Cambrige Street, Boston, MA, 02135. Phone: (617) 789-2903. Providers update this record themselves, so call before visiting.
How can I verify Olga N. Kozyreva, M.D.'s license?
NPPES lists Massachusetts license number 230270, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Olga N. Kozyreva, M.D. prescribe under Medicare Part D?
In 2024, Olga N. Kozyreva, M.D. had 574 Medicare Part D claims for 132 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. 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.