Ralph J. Blair, M.D.
Hospitalist Physician · Cambridge, MA
Ralph J. Blair, M.D. is a hospitalist physician with a practice address in Cambridge, Massachusetts, and NPI 1275568230, issued on Jul 11, 2006. Check the license (Massachusetts 51227, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ralph J. Blair
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 51227 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Mount Auburn St, Cambridge, MA 02138
- Phone
- (617) 492-3500
- Enumerated
- Jul 11, 2006
- Record last updated
- Sep 11, 2025
- Medicaid ID
- 3004481 MA
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 525 in Massachusetts → Look up another NPI →
Also registered at 330 Mount Auburn St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ralph J. Blair in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 51227Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ralph J. Blair among 525 hospitalist physician records in Massachusetts
Ralph J. Blair, M.D. is one of 525 hospitalist physician records with a practice address in Massachusetts. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 80% newer
- In a Medicare fileNo · 92% of these records are
- In the CMS Doctors and Clinicians fileNo · 86% of these records are
- Record last updated2025 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Massachusetts
There are 525 hospitalist physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 525 in Massachusetts → Every provider in Cambridge → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Eirini IliakiCambridge, MA 021381538326996
- Joseph Khoory, DOCambridge, MA 021381902368962
- Jason Lieberthal, M.D.Cambridge, MA 021381518192947
- Andrew Modest, M.D.Cambridge, MA 021381336179118
- Hezha Seradji Aghdam, MDCambridge, MA 021381821617010
- Troy Tweiten, M.D.Cambridge, MA 021381447634670
- Melissa Bartick, M.D.Cambridge, MA 021391841213824
- Renata Cardoso, M.D.Cambridge, MA 021391891097036
Common questions
What is Ralph J. Blair, M.D.'s NPI number?
Ralph J. Blair, M.D.'s National Provider Identifier (NPI) is 1275568230, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ralph J. Blair, M.D. located?
The NPPES record lists a practice address at 330 Mount Auburn St, Cambridge, MA, 02138. Phone: (617) 492-3500. Providers update this record themselves, so call before visiting.
How can I verify Ralph J. Blair, M.D.'s license?
NPPES lists Massachusetts license number 51227, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.