NPI registry status
Active
2026 NPPES data Addiction Medicine (Preventive Medicine) Physician NPI 1912991522 MD
Verify on CMS → Brian Oconnor, MD
Addiction Medicine (Preventive Medicine) Physician in Woburn, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 343 in Addiction Medicine (Preventive Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
810
Medicare Part D claims · 84 beneficiaries · Addiction Medicine (Preventive Medicine) Physician avg: 929
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$147.19
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Brian Oconnor, MD filed 810 Medicare Part D claims in 2024 as an Addiction Medicine (Preventive Medicine) Physician in Woburn, Massachusetts, prescribing 92% generic.
- 810
- Part D claims, 2024
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥72nd
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Brian Oconnor, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1912991522), first enumerated 09/09/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 810 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$147.19 in reported industry payments (6 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Brian Oconnor, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1912991522 · Addiction Medicine (Preventive Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1912991522
- ENUM-LEGACY 2005
- TAX-TRACE 343
- RX-LIGHT 810
- BOOK-THIN 32 in Massachusetts
- PHOTO-ENUM Cynthia Kahn, MD · 2005
Brian Oconnor, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
810 ≥ 72nd percentile 72% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Brian Oconnor, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Brian Oconnor, MD?
Quality data not reportedPrimary specialty
Addiction Medicine (Preventive Medicine) Physician
Medicare Part D claims
810 13% vs specialty avg
Specialty distribution in Massachusetts
How Addiction Medicine (Preventive Medicine) Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Addiction Medicine (Preventive Medicine) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1912991522 |
|---|---|
| Specialty | Addiction Medicine (Preventive Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/09/2005 |
Hospital and facility affiliations
Facilities where Brian Oconnor, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Middlesex Recovery PC
Woburn, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Brian Oconnor, MD. Source: openpaymentsdata.cms.gov.
Total received
$147
Largest payer
Indivior Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Brian Oconnor, MD. To verify Brian Oconnor, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Brian Oconnor, MD - brand share 8.0%
Addiction Medicine (Preventive Medicine) Physician average
8% brand-name claims vs 92% generic, on 810 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
810
Total Claims
$108K
Total Drug Cost
84
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 861
- Total Day Supply
- 22,025
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $67K
- Generic Drug Cost
- $41K
Patient Demographics
- Average Patient Age
- 58.8 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 42% female / 58% male
- Age Distribution
- <65: 51, 65-74: 30, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Brian Oconnor, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
308 claims
- Buprenorphine Hcl 52
Buprenorphine Hcl
52 claims
- Lorazepam 45
Lorazepam
45 claims
- Alprazolam 39
Alprazolam
39 claims
- Dextroamphetamine-… 39
Dextroamphetamine-Amphetamine
39 claims
- Gabapentin 36
Gabapentin
36 claims
- Clonidine Hcl 33
Clonidine Hcl
33 claims
- Quetiapine Fumarate 28
Quetiapine Fumarate
28 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 308 |
| Buprenorphine Hcl | 52 |
| Lorazepam | 45 |
| Alprazolam | 39 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 39 |
| Gabapentin | 36 |
| Clonidine Hcl | 33 |
| Quetiapine Fumarate | 28 |
| Suboxone Buprenorphine Hcl/Naloxone Hcl | 28 |
| Vivitrol Naltrexone Microspheres | 25 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Preventive Medicine) Physician in MA →
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Addiction Medicine (Preventive Medicine) Physician Overview
How Brian Oconnor, MD fits within the Addiction Medicine (Preventive Medicine) Physician landscape nationally.
343
Addiction Medicine (Preventive Medicine) Physician Providers in US
46
States with Addiction Medicine (Preventive Medicine) Physician
929
Avg Claims per Provider
Brian Oconnor, MD's 810 claims are below the specialty average of 929.
Nationwide Addiction Medicine (Preventive Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Oconnor, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Preventive Medicine) Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Oconnor.
One of 32 Addiction Medicine (Preventive Medicine) Physician providers enrolled in Massachusetts, 5 are shown here.
Frequently Asked Questions
What is Brian Oconnor, MD's specialty? ▼
Brian Oconnor, MD specializes in Addiction Medicine (Preventive Medicine) Physician and practices in Woburn, Massachusetts. Credentials: MD.
How much does Brian Oconnor, MD prescribe under Medicare Part D? ▼
In 2024, Brian Oconnor, MD wrote 810 Medicare Part D claims totaling $108K in drug costs for 84 beneficiaries.
Where is Brian Oconnor, MD located? ▼
Brian Oconnor, MD is located at 20 TOWER OFFICE PARK, Woburn, MA, 01801. Phone: (781) 305-3300.
What is Brian Oconnor, MD's NPI number? ▼
Brian Oconnor, MD's National Provider Identifier (NPI) is 1912991522, issued on 09/09/2005.
Does Brian Oconnor, MD prescribe more brand-name or generic drugs? ▼
Brian Oconnor, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $67K in brand drug costs.
How many Addiction Medicine (Preventive Medicine) Physician providers are there in the US? ▼
There are 343 Addiction Medicine (Preventive Medicine) Physician providers across 46 states in the US. The average Addiction Medicine (Preventive Medicine) Physician provider writes 929 Medicare Part D claims per year.
What drugs does Brian Oconnor, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Brian Oconnor, MD's most frequently prescribed drugs include Buprenorphine-Naloxone, Buprenorphine Hcl, Lorazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Oconnor, MD accept Medicare? ▼
Brian Oconnor, MD appears in CMS Medicare data with 810 Part D claims and 84 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Oconnor, MD's credentials? ▼
Brian Oconnor, MD's NPI is 1912991522 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.