CatalysisHeterocyclic Compounds, 4 or More RingsHydrogenation
Dr. Michael Kevin O'Brien, MD
NPI1730107061PAC ID2365638095
- Medicare services, 2024
- 97
- Medicare patients, 2024
- 68
- Part D claims, 2021
- 11
- Publications
- 4
- Hospital affiliations
- 1
- Practice address
- 669 Boston Post Rd, Guilford, CT 06437
- Practice phone
- Call (203) 772-0650
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgical Associates of New Haven
Guilford, Connecticut
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. Michael Kevin O'Brien is a general surgeon in Guilford, Connecticut
Dr. O'Brien practices at Surgical Associates of New Haven in Guilford, Connecticut.
Dr. O'Brien's NPI, 1730107061, was assigned on July 17, 2006. Dr. O'Brien graduated from Wake Forest School of Medicine of Wake Forest Baptist Medical Center in 1991. Dr. O'Brien holds Connecticut license 035075.
NPI and contact details
- NPI
- 1730107061NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365638095
- NPI enumeration date
- July 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 772-0650
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Kevin O'Brien practices at Surgical Associates of New Haven in Guilford, Connecticut
Dr. O'Brien's primary practice is Surgical Associates of New Haven, at 669 Boston Post Rd, Guilford, CT 06437 in South Central Ct County. The practice phone is (203) 772-0650.
- Surgical Associates of New Haven669 Boston Post Rd, Guilford, CT 06437 · South Central Ct CountyPhone(203) 772-0650
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael Kevin O'Brien is affiliated with 3 sites of care and 1 medical group
Dr. O'Brien's primary practice is Surgical Associates of New Haven in Guilford, Connecticut. Dr. O'Brien is also affiliated with Yale New Haven Hospital. The medical group on file is Surgical Associates of New Haven. Dmand AI also links Dr. O'Brien to 1 more group practice or clinic, named with a free account.
Surgical Associates of New HavenPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael Kevin 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 |
|---|---|
| Surgical Associates of New Haven | 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. Michael Kevin O'Brien is one of 303 general surgeons in Connecticut
Surgery is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. O'Brien is licensed in Connecticut.
Specialties and state licenses
- Surgery, ConnecticutPrimary
General surgeons near Dr. O'Brien
Counts of general surgeons 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. Michael Kevin O'Brien billed Medicare for 97 services in 2024
CMS data shows 97 Medicare services from Dr. O'Brien across 5 procedure codes in 2024, for 68 Medicare patients. Medicare paid $11,595 for them.
Medicare services, 202497
Medicare patients68
Paid by Medicare$11,595
Procedure codes5
Dr. O'Brien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 992024: 8415%
- Surgery
- 2023: 322024: 1359%
Where Dr. O'Brien's Medicare services took place, 2024
- In an office8487%
- In a facility1313%
Dr. O'Brien compared with the Connecticut median for general surgeons, 2024
- Dr. O'Brien
- Connecticut median
- Medicare services
- 97vs 10911% below
- Medicare patients
- 68vs 9528% below
- Part D claims
- 11vs 2556% below
Medians across 295 general surgeons in Connecticut 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.
Need commercial claims for Dr. O'Brien?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Brien and other general surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Kevin O'Brien treated 68 Medicare patients in 2024, average age 77
CMS counts 68 Medicare patients who saw Dr. O'Brien in 2024. The largest group is 75 to 84, with 31 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 67, with 43% women.
Medicare patients, 202468
Average age77
Average risk score1.06
Dr. O'Brien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. O'Brien's Medicare patients by sex, 2024
- Women2334%
- Men4566%
Chronic conditions among Dr. O'Brien's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis46%
- Ischemic heart disease29%
- Mood disorders26%
- Cancer25%
- Diabetes25%
- Depression22%
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 67
Patient panel by sex, all payers
- Women43%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Kevin O'Brien wrote 11 Medicare Part D claims in 2021
In 2021, Dr. O'Brien wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $58 in total drug cost.
Part D claims, 202111
Drugs named by CMS1
Total drug cost$58
Dr. O'Brien's most prescribed drugs by claims, 2021
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. Michael Kevin 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. Michael Kevin O'Brien has 4 publications on record
Dmand AI links 4 papers to Dr. O'Brien, published from 2010 to 2013.
Papers4
Years published2010 to 2013
Dr. O'Brien's papers by year, 2010 to 2013
Recent publications by Dr. O'Brien
Anat Sci Educ
AnatomyClinical MedicineConsumer Behavior
Chemistry, PharmaceuticalDrug DesignDrug Industry
Aerosp Med Hum Perform
Aerospace MedicineAnticoagulantsAortic Valve
See who Dr. O'Brien researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Brien works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael Kevin O'Brien received $161 in industry payments from 2016 to 2022
CMS Open Payments shows 3 general payments to Dr. O'Brien from 2 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $130.
General payments to Dr. O'Brien by program year, 2016 to 2022
Companies that paid Dr. O'Brien the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Kevin O'Brien graduated from Wake Forest School of Medicine of Wake Forest Baptist Medical Center
Dr. O'Brien graduated from Wake Forest School of Medicine of Wake Forest Baptist Medical Center in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Kevin 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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Michael Kevin 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. Michael Kevin O'Brien's NPI number?
Dr. Michael Kevin O'Brien's NPI number is 1730107061. It was assigned on July 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Kevin O'Brien?
Dr. Michael Kevin O'Brien is a general surgeon in Guilford, Connecticut. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Michael Kevin O'Brien practice?
Dr. O'Brien practices at 669 Boston Post Rd, Guilford, CT 06437. Dr. O'Brien's primary practice is Surgical Associates of New Haven in Guilford, Connecticut. Dmand AI also links Dr. O'Brien to 1 group practice or clinic.
What is Dr. Michael Kevin O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (203) 772-0650.
What is Dr. Michael Kevin O'Brien's medical license number?
Dr. O'Brien holds Connecticut license 035075.
Which hospitals is Dr. Michael Kevin O'Brien affiliated with?
Dr. O'Brien is affiliated with Yale New Haven Hospital.
What medical group is Dr. Michael Kevin O'Brien part of?
Dr. O'Brien is linked to Surgical Associates of New Haven.
Does Dr. Michael Kevin O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 97 services in 2024, and Dr. O'Brien accepts Medicare assignment.
How many Medicare patients does Dr. Michael Kevin O'Brien see?
CMS counts 68 Medicare patients who saw Dr. O'Brien in 2024, with an average age of 77.
What services does Dr. Michael Kevin O'Brien bill to Medicare?
In 2024, Dr. O'Brien's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and office visit, established patient (99212).
Show 5 more questionsShow fewer questions
Where did Dr. Michael Kevin O'Brien go to medical school?
Dr. O'Brien graduated from Wake Forest School of Medicine of Wake Forest Baptist Medical Center in 1991.
What drugs does Dr. Michael Kevin O'Brien prescribe most?
In 2021 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Cephalexin.
Has Dr. Michael Kevin O'Brien received payments from drug or device companies?
CMS Open Payments shows $161 in general payments to Dr. O'Brien from 2 companies from 2016 to 2022. The largest total came from Medtronic, Inc.
How long has Dr. Michael Kevin O'Brien been practicing?
Dr. O'Brien graduated from medical school in 1991, 35 years ago.
Does Dr. Michael Kevin O'Brien do research?
Dmand AI links 4 publications to Dr. O'Brien, published from 2010 to 2013.
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