Dr. Michael J O'brien , MD
Pathology - Anatomic Pathology โข Boston, MA
670 Albany St, Floor 3, Room 310
Boston, MA 021182646
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Michael O'Brien is listed in NPPES under Pathology - Anatomic Pathology.
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NPI assigned on February 6, 2006; this date does not establish years in practice.
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Published CMS data list 2,623 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 88305 โ Pathology examination of tissue using a microscope, intermediate complexity: 2,387 service units.
- 88342 โ Special stained specimen slides to examine tissue, initial procedure: 205 service units.
- 88341 โ Special stained specimen slides to examine tissue, each additional procedure: 31 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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More Medicare Part B services than 85% of clinicians listed under Pathology - Anatomic Pathology in Boston, MA (2024, 103 clinicians with data). Median for this group: 990. Middle half: 408 to 1,957.
More Medicare Part B services than 80% of clinicians listed under Pathology - Anatomic Pathology in Massachusetts (2024, 157 clinicians with data). Median for this group: 1,346. Middle half: 629 to 2,282.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 2,182 in 2020 to 2,623 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
670 Albany St
Floor 3, Room 310
Boston, MA 021182646
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: South Suburban Gastroenterology Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1971
What Public CMS Data Show
Pathology - Anatomic Pathology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
974 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $219,219 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $156,149 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
55 years (graduated 1971)
CMS Doctors and Clinicians data list 1971 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. O'Brien has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. O'Brien as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Pathology - Anatomic Pathology in Boston, MA (2024, 103 clinicians with data). Median for this group: 990. Middle half: 408 to 1,957.
More Medicare Part B services than 80% of clinicians listed under Pathology - Anatomic Pathology in Massachusetts (2024, 157 clinicians with data). Median for this group: 1,346. Middle half: 629 to 2,282.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Pathology - Anatomic Pathology in Boston, MA (2024, 103 clinicians with data). Median for this group: $45,378. Middle half: $19,889 to $81,556.
A higher Medicare-allowed amount than 95% of clinicians listed under Pathology - Anatomic Pathology in Massachusetts (2024, 157 clinicians with data). Median for this group: $53,176. Middle half: $26,435 to $86,990.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Pathology - Anatomic Pathology in Boston, MA (2024, 103 clinicians with data). Median for this group: $36,407. Middle half: $15,855 to $64,357.
A higher Medicare payment amount than 95% of clinicians listed under Pathology - Anatomic Pathology in Massachusetts (2024, 157 clinicians with data). Median for this group: $41,704. Middle half: $20,703 to $68,820.
186 active clinicians are listed under Pathology - Anatomic Pathology with a practice address in Boston, MA (278 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
0.5% of these 186 clinicians have the CMS telehealth indicator.
58.6% of these 186 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 20% from 2,182 in 2020 to 2,623 in 2024.
- 2020: 2,182
- 2021: 3,138
- 2022: 3,339
- 2023: 2,986
- 2024: 2,623
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Medicare-allowed amount
Medicare-allowed amount increased 19% from $184,810 in 2020 to $219,219 in 2024.
- 2020: $184,810
- 2021: $264,830
- 2022: $280,699
- 2023: $249,762
- 2024: $219,219
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Paid by Medicare
Paid by Medicare increased 14% from $136,507 in 2020 to $156,149 in 2024.
- 2020: $136,507
- 2021: $192,387
- 2022: $202,730
- 2023: $180,244
- 2024: $156,149
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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88305
Pathology examination of tissue using a microscope, intermediate complexity
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2,387 | 974 | $200.00 | $80.15 |
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88342
Special stained specimen slides to examine tissue, initial procedure
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205 | 186 | $500.00 | $120.48 |
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88341
Special stained specimen slides to examine tissue, each additional procedure
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31 | 27 | $300.00 | $103.32 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207ZP0101X
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PATHOLOGY
I20050407000271
MA
6002705852
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
South Suburban Gastroenterology Pc
97 Libbey Pkwy, Weymouth, MA 021893110
Phone: 7813312922
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1085 MAIN ST, SOUTH WEYMOUTH, MA 021901547
NPI status registered as active in NPPES database
Registered at 670 ALBANY ST, FLOOR 3, ROOM 310, BOSTON, MA 021182646 (Tel: 6174145314)
Registered at 720 HARRISON AVE, DOB 503, BOSTON, MA 02118
Recorded as MICHAEL O'BRIEN, MD
Pathology (license number reported to NPPES: MA 40684)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Pathology - Anatomic Pathology Specialists in Boston
- Dr. Jerrold Turner, MD
- Dr. Bayan Alzumaili, MD
- Dr. Anthony Iafrate, MD PHD
- Dr. Melinda Lerwill, MD
- Dr. Stephen Naber, MD
- Dr. Jon Aster, MD PHD
Mailing Address
1085 Main St
South Weymouth, MA 021901547