Sajjad Hassan, MD
Clinical Pathology/Laboratory Medicine Physician · Springfield, MA
Sajjad Hassan, MD is a clinical pathology/laboratory medicine physician with a practice address in Springfield, Massachusetts, and NPI 1174999197, issued on Aug 13, 2015. Check the license (Massachusetts 290990, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Sajjad Hassan
- Credential
- MD
- Primary taxonomy
- Clinical Pathology/Laboratory Medicine Physician 207ZP0105X
- License number
- 290990 MA
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut St # D1170, Springfield, MA 01107
- Phone
- (413) 794-7455
- Enumerated
- Aug 13, 2015
- Record last updated
- Jun 30, 2022
- Fax
- (413) 794-3195
- Medicare enrollment
- Enrolled (PECOS I20220505001715); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical pathology/laboratory medicine physician records → All 52 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut St # D1170
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Selove, M.D.Anatomic Pathology Physician1649619974
- Lynette Viruet Guzman, MDAnatomic Pathology & Clinical Pathology Physician1598254385
Verify Sajjad Hassan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 290990Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Baystate Medical Practices IncSpringfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sajjad Hassan among 52 clinical pathology/laboratory medicine physician records in Massachusetts
Sajjad Hassan, MD is one of 52 clinical pathology/laboratory medicine physician records with a practice address in Massachusetts. 37% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 87% of them.
- NPI issued2015 · 87% of these records are older, 12% newer
- In a Medicare fileYes · 37% of these records are
- In the CMS Doctors and Clinicians fileYes · 35% of these records are
- Graduated2005 · median 1998 among the 18 with a school on file
- Record last updated2022 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0105X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Pathology/Laboratory Medicine Physician providers in Massachusetts
There are 52 clinical pathology/laboratory medicine physician records in Massachusetts.
All 52 in Massachusetts → Every provider in Springfield → Clinical Pathology/Laboratory Medicine Physician nationwide →
The 8 clinical pathology/laboratory medicine physician records with the nearest ZIP codes
- Umarani Thamaraichelvan, M.D.Boston, MA 015831972753838
- Jeffrey Saenger, M.D.Worcester, MA 016081710952429
- Su Zheng, M.D.Worcester, MA 016081437103082
- Lauren Hiestand, M.D.Worcester, MA 016551346224276
- Michael Mitchell, MDWorcester, MA 016551255315115
- Igor Rozenvald, M.D.Worcester, MA 016551568400851
- Louis Snyder, MDWorcester, MA 016551629050810
- Habib Sioufi, MDMarlborough, MA 017521639151574
Common questions
What is Sajjad Hassan, MD's NPI number?
Sajjad Hassan, MD's National Provider Identifier (NPI) is 1174999197, issued on Aug 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Sajjad Hassan, MD located?
The NPPES record lists a practice address at 759 Chestnut St # D1170, Springfield, MA, 01107. Phone: (413) 794-7455. Providers update this record themselves, so call before visiting.
How can I verify Sajjad Hassan, MD's license?
NPPES lists Massachusetts license number 290990, 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. 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.