Daniel P. O'Leary
- Medicare patients, 2024
- 341
- Part D claims, 2024
- 448
- Hospital affiliations
- 1
- Industry payments
- $54
- Medical groups
- 2
- Practice address
- 100 Hospital Rd Suite 3c Suite 3c, Leominster, MA 01453-2253
- Practice phone
- Call (978) 534-6333
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Longview Orthopaedic Center
Surgical practice · Leominster, Massachusetts
Find Daniel O'Leary'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.
Daniel P. O'Leary is a physician assistant in Leominster, Massachusetts
Daniel O'Leary practices at Longview Orthopaedic Center in Leominster, Massachusetts.
Daniel O'Leary's NPI, 1255778551, was assigned on May 28, 2013.
- NPI
- 1255778551NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183866619
- NPI enumeration date
- May 28, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 534-6333
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Daniel P. O'Leary practices at Longview Orthopaedic Center in Leominster, Massachusetts
Daniel O'Leary's primary practice is Longview Orthopaedic Center, at 100 Hospital Rd Suite 3c Suite 3c, Leominster, MA 01453-2253. The practice phone is (978) 534-6333.
- Longview Orthopaedic Center100 Hospital Rd Suite 3c Suite 3c, Leominster, MA 01453-2253Phone(978) 534-6333
Source: Dmand AI Affiliation Data
Daniel P. O'Leary is affiliated with 3 sites of care and 2 medical groups
Daniel O'Leary's primary practice is Longview Orthopaedic Center in Leominster, Massachusetts. Daniel O'Leary is also affiliated with UMass Memorial Health - HealthAlliance-Clinton Hospital. The medical group on file is Longview Orthopaedic Center. Dmand AI also links Daniel O'Leary to 1 more group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Daniel P. O'Leary's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Daniel O'Leary practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Longview Orthopaedic Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Daniel P. O'Leary is one of 3,922 physician assistants in Massachusetts
Physician assistant is Daniel O'Leary's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Daniel O'Leary has a license on file in Massachusetts.
Specialties and state licenses
- Physician assistant, Massachusetts
Physician assistants near Daniel O'Leary
Counts of physician assistants 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
Daniel P. O'Leary treated 341 Medicare patients in 2024, average age 72
CMS counts 341 Medicare patients who saw Daniel O'Leary in 2024. The largest group is 65 to 74, with 140 patients. 75% of them have arthritis, and 75% have high blood pressure. 35% are also on Medicaid. Their average risk score is 1.52, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Daniel O'Leary's median patient age at 63, with 60% women.
Daniel O'Leary's Medicare patients by age, 2024
Daniel O'Leary's Medicare patients by sex, 2024
- Women21362%
- Men12838%
Chronic conditions among Daniel O'Leary's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol72%
- Anxiety48%
- Mood disorders44%
- Depression40%
- Ischemic heart disease27%
- Chronic kidney disease26%
Share of Medicare patients with each condition. A patient can have several.
Daniel O'Leary's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Daniel P. O'Leary wrote 448 Medicare Part D claims in 2024
In 2024, Daniel O'Leary wrote 448 Medicare Part D claims for 248 patients. 98% of them were for generic drugs.
Daniel O'Leary's Part D claims by kind of drug, 2024
- Generic440 claims98%
- Brand-name and other8 claims2%
Drug classes CMS tracks in Daniel O'Leary's Part D claims, 2024
- Opioids45%203 of 448 claims
- Antibiotics3%13 of 448 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Daniel P. O'Leary takes part in Medicare
Daniel O'Leary 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Daniel P. O'Leary received $54 in industry payments in 2025
CMS Open Payments shows 2 general payments to Daniel O'Leary from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Endo USA, Inc. paid the most, $54.
Companies that paid Daniel O'Leary the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Daniel P. O'Leary'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| 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 (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) |
| 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 Daniel P. O'Leary
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Daniel P. O'Leary's NPI number?
Daniel P. O'Leary's NPI number is 1255778551. It was assigned on May 28, 2013, and it is active in the NPI Registry.
What does Daniel P. O'Leary specialize in?
Daniel P. O'Leary is a physician assistant in Leominster, Massachusetts. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Daniel P. O'Leary practice?
Daniel O'Leary practices at 100 Hospital Rd Suite 3c Suite 3c, Leominster, MA 01453-2253. Daniel O'Leary's primary practice is Longview Orthopaedic Center in Leominster, Massachusetts. Dmand AI also links Daniel O'Leary to 1 group practice or clinic and 1 medical group.
What is Daniel P. O'Leary's office phone number?
The practice phone on file for Daniel O'Leary is (978) 534-6333.
Which hospitals is Daniel P. O'Leary affiliated with?
Daniel O'Leary is affiliated with UMass Memorial Health - HealthAlliance-Clinton Hospital.
What medical group is Daniel P. O'Leary part of?
Daniel O'Leary is linked to Longview Orthopaedic Center. Dmand AI links Daniel O'Leary to 1 more medical group.
Does Daniel P. O'Leary accept Medicare?
Yes. CMS lists Daniel O'Leary as accepting Medicare assignment.
How many Medicare patients does Daniel P. O'Leary see?
CMS counts 341 Medicare patients who saw Daniel O'Leary in 2024, with an average age of 72.
Has Daniel P. O'Leary received payments from drug or device companies?
CMS Open Payments shows $54 in general payments to Daniel O'Leary from 1 company from 2025 to 2025. The largest total came from Endo USA, Inc.
How long has Daniel P. O'Leary been practicing?
Daniel O'Leary graduated from medical school in 2012, 14 years ago.
Selling to physician assistant practices?
See physician assistants in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card