Heidi Ann O'Brien, PA-C
- Medicare patients, 2024
- 315
- Part D claims, 2024
- 3,416
- Hospital affiliations
- 2
- Industry payments
- $216
- Medical groups
- 2
- Practice address
- 14 Prospect Street, Milford, MA 01757
- Practice phone
- Call (508) 473-1190
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Heidi 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.
Heidi Ann O'Brien is a physician assistant in Milford, Massachusetts
Heidi O'Brien practices at UMass Memorial Health - Milford Regional Medical Center in Milford, Massachusetts, part of UMass Memorial Health Care.
Heidi O'Brien's NPI, 1417057944, was assigned on September 24, 2006. Heidi O'Brien holds Massachusetts license AP 1492.
- NPI
- 1417057944NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961489232
- NPI enumeration date
- September 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (508) 473-1190
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Heidi Ann O'Brien practices at UMass Memorial Health - Milford Regional Medical Center in Milford, Massachusetts
Heidi O'Brien's primary practice is UMass Memorial Health - Milford Regional Medical Center, at 14 Prospect Street, Milford, MA 01757 in Worcester County. The practice phone is (508) 473-1190.
- UMass Memorial Health - Milford Regional Medical Center14 Prospect Street, Milford, MA 01757 · Worcester CountyPhone(508) 473-1190
Source: Dmand AI Affiliation Data
Heidi Ann O'Brien is affiliated with 6 sites of care and 2 medical groups
Heidi O'Brien's primary practice is UMass Memorial Health - Milford Regional Medical Center in Milford, Massachusetts, part of UMass Memorial Health Care. Heidi O'Brien is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Heidi O'Brien to 2 more group practices and clinics, 1 home health agency, 1 imaging center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Heidi Ann O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Heidi O'Brien practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UMass Memorial Health - Milford Regional Medical Center | Available with a free account |
| +5 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 UMass Memorial Health Care and 6.2K+ hospitals, with verified contacts in the same login.
Heidi Ann O'Brien is one of 3,922 physician assistants in Massachusetts
Physician assistant is Heidi O'Brien's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Heidi O'Brien is licensed in Massachusetts.
Specialties and state licenses
- Physician assistant, MassachusettsPrimary
Physician assistants near Heidi O'Brien
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
Heidi Ann O'Brien treated 315 Medicare patients in 2024, average age 76
CMS counts 315 Medicare patients who saw Heidi O'Brien in 2024. The largest group is 75 to 84, with 128 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.50, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Heidi O'Brien's median patient age at 71, with 39% women.
Heidi O'Brien's Medicare patients by age, 2024
Heidi O'Brien's Medicare patients by sex, 2024
- Women11737%
- Men19863%
Chronic conditions among Heidi O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Chronic kidney disease35%
- Diabetes32%
- Ischemic heart disease29%
- Anxiety28%
- Cancer28%
Share of Medicare patients with each condition. A patient can have several.
Heidi 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 71
Patient panel by sex, all payers
- Women39%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Heidi Ann O'Brien wrote 3,416 Medicare Part D claims in 2024
In 2024, Heidi O'Brien wrote 3,416 Medicare Part D claims for 728 patients. 80% of them were for generic drugs.
Heidi O'Brien's Part D claims by kind of drug, 2024
- Generic2,730 claims80%
- Brand-name686 claims20%
Drug classes CMS tracks in Heidi O'Brien's Part D claims, 2024
- Opioids1%21 of 3,416 claims
- Antibiotics17%590 of 3,416 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
Heidi Ann O'Brien offers telehealth to Medicare patients
Heidi O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Heidi O'Brien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Heidi Ann O'Brien received $216 in industry payments in 2025
CMS Open Payments shows 8 general payments to Heidi O'Brien from 7 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Antares Pharma, Inc. paid the most, $51.
Companies that paid Heidi O'Brien 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 Heidi Ann 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 Heidi Ann 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 Heidi Ann O'Brien's NPI number?
Heidi Ann O'Brien's NPI number is 1417057944. It was assigned on September 24, 2006, and it is active in the NPI Registry.
What does Heidi Ann O'Brien specialize in?
Heidi Ann O'Brien is a physician assistant in Milford, Massachusetts. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Heidi Ann O'Brien practice?
Heidi O'Brien practices at 14 Prospect Street, Milford, MA 01757. Heidi O'Brien's primary practice is UMass Memorial Health - Milford Regional Medical Center in Milford, Massachusetts, part of UMass Memorial Health Care. Dmand AI also links Heidi O'Brien to 2 group practices and clinics, 1 home health agency, 1 imaging center and 1 medical group.
What is Heidi Ann O'Brien's office phone number?
The practice phone on file for Heidi O'Brien is (508) 473-1190.
What is Heidi Ann O'Brien's medical license number?
Heidi O'Brien holds Massachusetts license AP 1492.
Which hospitals is Heidi Ann O'Brien affiliated with?
Heidi O'Brien practices at UMass Memorial Health - Milford Regional Medical Center in Milford, Massachusetts. Heidi O'Brien is also affiliated with UMass Memorial Medical Center - University Campus.
What medical group is Heidi Ann O'Brien part of?
Heidi O'Brien is linked to UMass Memorial Medical Group. Dmand AI links Heidi O'Brien to 1 more medical group.
Does Heidi Ann O'Brien accept Medicare?
Yes. CMS lists Heidi O'Brien as accepting Medicare assignment.
Does Heidi Ann O'Brien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Heidi O'Brien as offering telehealth services.
How many Medicare patients does Heidi Ann O'Brien see?
CMS counts 315 Medicare patients who saw Heidi O'Brien in 2024, with an average age of 76.
Has Heidi Ann O'Brien received payments from drug or device companies?
CMS Open Payments shows $216 in general payments to Heidi O'Brien from 7 companies from 2025 to 2025. The largest total came from Antares Pharma, Inc.
How long has Heidi Ann O'Brien been practicing?
Heidi O'Brien graduated from medical school in 2002, 24 years ago.
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