James Mark Greenblatt, M.D
Psychiatry Physician · Waltham, MA
James Mark Greenblatt, M.D is a psychiatry physician with a practice address in Waltham, Massachusetts, and NPI 1790817575, issued on Mar 9, 2007. Check the license (Massachusetts 70333, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- James Mark Greenblatt
- Credential
- M.D
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 70333 MA
Self-reported in NPPES; status is on the state search - Practice location
- 9 Hope Ave Ste 500, Waltham, MA 02453
- Phone
- (781) 647-0066
- Enumerated
- Mar 9, 2007
- Record last updated
- Mar 16, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (781) 899-4905
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 9 Hope Ave Ste 500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jenna WesselsPsychiatric/Mental Health Nurse Practitioner1013481290
Verify James Mark Greenblatt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 70333Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average psychiatry physician in 2024
46 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Pregabalin16 claims
- Desvenlafaxine Succinate Er12 claims
- Paroxetine Hcl12 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.
James Mark Greenblatt among 2,736 psychiatry physician records in Massachusetts
James Mark Greenblatt, M.D is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 37% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2016 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Massachusetts
There are 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Waltham → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sabrina Dar, MDWaltham, MA 024531659866069
- Miriam Goodman, MDWaltham, MA 024531932282266
- Irina Guryanova, MDWaltham, MA 024531619925898
- Jacob Howe, MDWaltham, MA 024531841431798
- George Sigel, M.D.Waltham, MA 024531578526752
- Tanya Yanovsky, M.D.Waltham, MA 024531295719748
- Pearl Alweny, NPWaltham, MA 024521255830543
- Martina Albright, PHDNewton, MA 024581144210220
Common questions
What is James Mark Greenblatt, M.D's NPI number?
James Mark Greenblatt, M.D's National Provider Identifier (NPI) is 1790817575, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is James Mark Greenblatt, M.D located?
The NPPES record lists a practice address at 9 Hope Ave Ste 500, Waltham, MA, 02453. Phone: (781) 647-0066. Providers update this record themselves, so call before visiting.
How can I verify James Mark Greenblatt, M.D's license?
NPPES lists Massachusetts license number 70333, 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 James Mark Greenblatt, M.D prescribe under Medicare Part D?
In 2024, James Mark Greenblatt, M.D had 46 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.