Dr. Adam D. O'Brien, DO
- Medicare services, 2024
- 58
- Medicare patients, 2024
- 195
- Part D claims, 2016
- 12
- Hospital affiliations
- 2
- Industry payments
- $2,349
- Practice address
- 175 Fore River Pkwy, Portland, ME 04102
- Practice phone
- Call (207) 879-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northern Light Mercy Hospital
Portland, Maine
Find Dr. O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Adam D. O'Brien is an anesthesiologist in Portland, Maine
Dr. O'Brien practices at Northern Light Mercy Hospital in Portland, Maine.
Dr. O'Brien's NPI, 1912380320, was assigned on July 2, 2015. Dr. O'Brien graduated from University of New England, College of Osteo Medicine in 2015. Dr. O'Brien holds Maine license DO2916.
- NPI
- 1912380320NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072808377
- NPI enumeration date
- July 2, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 879-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Adam D. O'Brien practices at Northern Light Mercy Hospital in Portland, Maine
Dr. O'Brien's primary practice is Northern Light Mercy Hospital, at 175 Fore River Pkwy, Portland, ME 04102 in Cumberland County. The practice phone is (207) 879-3000.
- Northern Light Mercy Hospital175 Fore River Pkwy, Portland, ME 04102 · Cumberland CountyPhone(207) 879-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Adam D. O'Brien is affiliated with 3 sites of care and 1 medical group
Dr. O'Brien's primary practice is Northern Light Mercy Hospital in Portland, Maine. Dr. O'Brien is also affiliated with Northern Light Mercy Hospital. The medical group on file is Spectrum Healthcare Partners. Dmand AI also links Dr. O'Brien to 1 more hospital, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Adam D. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northern Light Mercy Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Adam D. O'Brien is one of 247 anesthesiologists in Maine
Anesthesiology is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dmand AI has Dr. O'Brien's licenses on file in 2 states: Maine and Massachusetts.
Specialties and state licenses
- Anesthesiology, MainePrimary
- Internal medicine, Massachusetts
Anesthesiologists near Dr. O'Brien
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Adam D. O'Brien billed Medicare for 58 services in 2024
CMS data shows 58 Medicare services from Dr. O'Brien across 4 procedure codes in 2024, for 195 Medicare patients. Medicare paid $3,809 for them.
Dr. O'Brien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 602024: 4132%
- Surgery
- 2023: 362024: 1753%
Where Dr. O'Brien's Medicare services took place, 2024
- In an office4781%
- In a facility1119%
Dr. O'Brien compared with the Maine median for anesthesiologists, 2024
- Dr. O'Brien
- Maine median
- Medicare services
- 58vs 7118% below
- Medicare patients
- 195vs 15228% above
- Part D claims
- 12vs 2245% below
Medians across 247 anesthesiologists in Maine with Dmand AI profiles that report each measure.
Dr. O'Brien's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Brien and other anesthesiologists in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Adam D. O'Brien treated 195 Medicare patients in 2024, average age 72
CMS counts 195 Medicare patients who saw Dr. O'Brien in 2024. The largest group is 65 to 74, with 84 patients. 69% of them have high cholesterol, and 65% have high blood pressure. 21% are also on Medicaid. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 61, with 60% women.
Dr. O'Brien's Medicare patients by age, 2024
Dr. O'Brien's Medicare patients by sex, 2024
- Women10855%
- Men8745%
Chronic conditions among Dr. O'Brien's Medicare patients, 2024
- High cholesterol69%
- High blood pressure65%
- Arthritis61%
- Anxiety36%
- Mood disorders34%
- Depression27%
- Diabetes27%
- Ischemic heart disease26%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Adam D. O'Brien wrote 12 Medicare Part D claims in 2016
In 2016, Dr. O'Brien wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $21 in total drug cost.
Dr. O'Brien's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Adam D. O'Brien takes part in Medicare
Dr. O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Adam D. O'Brien received $2,349 in industry payments from 2019 to 2025
CMS Open Payments shows 6 general payments to Dr. O'Brien from 2 drug and device companies from 2019 to 2025. Travel and lodging make up the largest share, 94% of the total. Intuitive Surgical, Inc. paid the most, $2,208.
General payments to Dr. O'Brien by program year, 2019 to 2025
General payments to Dr. O'Brien by kind, 2019 to 2025
- Travel and lodging$2,20894%
- Food and beverage$1416%
Companies that paid Dr. O'Brien the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Adam D. O'Brien graduated from University of New England, College of Osteo Medicine
Dr. O'Brien graduated from University of New England, College of Osteo Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Adam D. O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Adam D. O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Adam D. O'Brien's NPI number?
Dr. Adam D. O'Brien's NPI number is 1912380320. It was assigned on July 2, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Adam D. O'Brien?
Dr. Adam D. O'Brien is an anesthesiologist in Portland, Maine. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Adam D. O'Brien practice?
Dr. O'Brien practices at 175 Fore River Pkwy, Portland, ME 04102. Dr. O'Brien's primary practice is Northern Light Mercy Hospital in Portland, Maine. Dmand AI also links Dr. O'Brien to 1 hospital.
What is Dr. Adam D. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (207) 879-3000.
What is Dr. Adam D. O'Brien's medical license number?
Dr. O'Brien holds Maine license DO2916, one of the licenses on file in 2 states.
Which states has Dr. Adam D. O'Brien been licensed in?
Dmand AI has state licenses on file for Dr. O'Brien in Maine and Massachusetts.
Which hospitals is Dr. Adam D. O'Brien affiliated with?
Dr. O'Brien is affiliated with Northern Light Mercy Hospital. Dmand AI links Dr. O'Brien to 1 more hospital.
What medical group is Dr. Adam D. O'Brien part of?
Dr. O'Brien is linked to Spectrum Healthcare Partners.
Does Dr. Adam D. O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 58 services in 2024, and Dr. O'Brien accepts Medicare assignment.
How many Medicare patients does Dr. Adam D. O'Brien see?
CMS counts 195 Medicare patients who saw Dr. O'Brien in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Adam D. O'Brien bill to Medicare?
In 2024, Dr. O'Brien's most billed Medicare services were anesthesia (01402), surgery: brain, spine and nerves (64447) and anesthesia (00811).
Where did Dr. Adam D. O'Brien go to medical school?
Dr. O'Brien graduated from University of New England, College of Osteo Medicine in 2015.
What drugs does Dr. Adam D. O'Brien prescribe most?
In 2016 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Amlodipine Besylate.
Has Dr. Adam D. O'Brien received payments from drug or device companies?
CMS Open Payments shows $2,349 in general payments to Dr. O'Brien from 2 companies from 2019 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Adam D. O'Brien been practicing?
Dr. O'Brien graduated from medical school in 2015, 11 years ago.
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