Clinical Pathologists (Laboratory Medicine) in Massachusetts
Data updated monthly · Last refresh October 2026
51 Clinical Pathology/Laboratory Medicine providers practice in Massachusetts. The largest concentration is in Boston. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
51providers
Bostontop city
Clinical Pathology/Laboratory Medicine by city in Massachusetts
Choose a city to see providers there.
Where Clinical Pathologists (Laboratory Medicine) in Massachusetts practice
From CMS Medicare enrollment records covering 15 of the 51 providers listed here (29%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Clinical Pathologists (Laboratory Medicine) | All clinicians in group | Main city |
| Brigham and Womens Physicians Organization Inc. | 4 | 2,931 | Boston |
| Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc. | 3 | 1,693 | Boston |
| Massachusetts General Physicians Organization Inc. | 2 | 3,494 | Boston |
| Lahey Clinic Inc. | 2 | 1,381 | Burlington |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Clinical Pathologists (Laboratory Medicine) affiliated |
| Brigham and Women's Hospital | Boston | Nonprofit | 5 of 5 | 5 |
| Beth Israel Deaconess Medical Center | Boston | Nonprofit | 3 of 5 | 5 |
| Newton-Wellesley Hospital | Newton | Nonprofit | 5 of 5 | 3 |
| Massachusetts General Hospital | Boston | Nonprofit | 5 of 5 | 3 |
| Beth Israel Deaconess Hospital Plymouth | Plymouth | Nonprofit | 4 of 5 | 2 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Clinical Pathology/Laboratory Medicine providers in Massachusetts
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Christopher Ianelli, M.D.Belmont, MA · No drug or device payments recorded (2025) ·
(617) 438-0194 Dr. Agata Smogorzewska, MD PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 304-2031 Dr. Alexander Mcadam, MD, PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 355-5754 Dr. Anders Berg, M. D., PH. D. Dr. Barbarajean Magnani, M.D., PH.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 414-5314 Dr. Bradley Bernstein, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 256-5520 Dr. Christopher Stowell, MH PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 726-2815 Dr. David Sacks, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 732-6627 Dr. Diana Mandelker, MD, PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 732-6202 Dr. Dmitry Ratner, MD, PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 667-7000 Dr. Dongsheng Xu, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 414-5314 Dr. Eric Grewal, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 726-2000 Dr. Erik KlontzBoston, MA · No drug or device payments recorded (2025) ·
(301) 542-2362 Dr. Jae Joung, MD PHDBoston, MA · No drug or device payments recorded (2025) ·
(617) 726-8887 Dr. James Kirby, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 667-3648 Dr. Jameson Dahlin, M.D., PH.D.Boston, MA · No drug or device payments recorded (2025) ·
(952) 836-5840 Dr. Jeffrey Arnold, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 636-5000 Dr. John Higgins, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 643-0800 Dr. Karim Ouahchi, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 732-7442 Dr. Loren Joseph, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 667-6700 Dr. Mara Lorenzi, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 726-8722 Dr. Massimo Loda, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 632-4705 Dr. Matthew Meyerson, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 632-4768 Dr. Milenko Tanasijevic, MD MBABoston, MA · No drug or device payments recorded (2025) ·
(617) 732-6245 Dr. Richard Benjamin, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(781) 461-2231 Dr. Richard Haspel, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 667-3648 Dr. Stacy Melanson, MD PHDBoston, MA · $3,825 in drug and device payments (2025) ·
(617) 732-7510 Dr. Stephen Blacklow, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 525-4415 Dr. Steve Bogen, M.D., PH.D.Boston, MA · No drug or device payments recorded (2025) ·
(617) 636-1112 Dr. Steven Sloan, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 355-6268 Dr. Umarani Thamaraichelvan, M.D.Boston, MA · No drug or device payments recorded (2025) ·
(508) 853-1074 Dr. Uriel Bulow, MDBoston, MA · No drug or device payments recorded (2025) ·
(617) 726-0367 Dr. Roger Belizaire, MD, PHDBrookline, MA · No drug or device payments recorded (2025) ·
(617) 732-5500 Dr. Gyorgy Abel, M.D.Burlington, MA · $133 in drug and device payments (2025) ·
(781) 744-8000 Dr. Timothy Skelton, M.D. PH.D.Burlington, MA · $221 in drug and device payments (2025) ·
(781) 744-8000 Dr. Ramy ArnaoutChestnut Hill, MA · No drug or device payments recorded (2025) ·
(617) 538-5681 Dr. Habib Sioufi, MDMarlborough, MA · No drug or device payments recorded (2025) ·
(508) 486-5701 Dr. Jihad Hayek, MDRoxbury Crossing, MA · No drug or device payments recorded (2025) ·
(617) 754-5800 Dr. Karoly Balogh, MDRoxbury Crossing, MA · No drug or device payments recorded (2025) ·
(617) 754-5800 Dr. Amir Rahemtulla, M.D.Salem, MA · No drug or device payments recorded (2025) ·
(978) 354-4161 Dr. Sajjad Hassan, MDSpringfield, MA · No drug or device payments recorded (2025) ·
(413) 794-7455 Dr. Jane Yang, MDWeston, MA · No drug or device payments recorded (2025) ·
(857) 303-0243 Dr. Igor Rozenvald, M.D.Worcester, MA · No drug or device payments recorded (2025) ·
(508) 793-6100 Dr. Jeffrey Saenger, M.D.Worcester, MA · No drug or device payments recorded (2025) ·
(774) 317-3684 Dr. Lauren Hiestand, M.D.Worcester, MA · No drug or device payments recorded (2025) ·
(508) 334-7159 Dr. Louis Snyder, MDWorcester, MA · No drug or device payments recorded (2025) ·
(774) 442-9271 Dr. Michael Mitchell, MDWorcester, MA · No drug or device payments recorded (2025) ·
(774) 442-9271 Common questions
How many Clinical Pathology/Laboratory Medicine providers are in Massachusetts?There are 51 Clinical Pathology/Laboratory Medicine providers with active NPI records practicing in Massachusetts, according to federal NPPES data refreshed monthly.
Which cities in Massachusetts have the most Clinical Pathology/Laboratory Medicine providers?Boston (34), Worcester (6), Roxbury Crossing (2) have the highest concentration of Clinical Pathology/Laboratory Medicine providers in Massachusetts.
How many Clinical Pathology/Laboratory Medicine providers in Massachusetts received drug or device company payments?8 of 51 Clinical Pathology/Laboratory Medicine providers in Massachusetts (16%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Which hospitals do Clinical Pathologists (Laboratory Medicine) in Massachusetts work at?According to CMS facility affiliation records, the Massachusetts hospitals where the most Clinical Pathologists (Laboratory Medicine) hold privileges are Brigham and Women's Hospital in Boston; Beth Israel Deaconess Medical Center in Boston; Newton-Wellesley Hospital in Newton.
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