Motor SkillsParesisRandomized Controlled Trials as Topic
Dr. Erin C. O'Hara, MD
NPI1942407077PAC ID2062547136
- Medicare services, 2024
- 248
- Medicare patients, 2024
- 129
- Part D claims, 2024
- 2,740
- Publications
- 1
- Hospital affiliations
- 4
- Practice address
- 242 Green Street, Gardner, MA 01440
- Practice phone
- Call (978) 632-3420
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Hara'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. Erin C. O'Hara is an internist in Gardner, Massachusetts
Dr. O'Hara practices at Heywood Hospital in Gardner, Massachusetts, part of Heywood Healthcare.
Dr. O'Hara's NPI, 1942407077, was assigned on July 2, 2007. Dr. O'Hara graduated from UMass Chan Medical School in 2007. Dr. O'Hara holds Massachusetts license 239461.
NPI and contact details
- NPI
- 1942407077NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062547136
- NPI enumeration date
- July 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (978) 632-3420
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Erin C. O'Hara practices at Heywood Hospital in Gardner, Massachusetts
Dr. O'Hara's primary practice is Heywood Hospital, at 242 Green Street, Gardner, MA 01440 in Worcester County. The practice phone is (978) 632-3420.
- Heywood Hospital242 Green Street, Gardner, MA 01440 · Worcester CountyPhone(978) 632-3420
Source: Dmand AI Affiliation Data
Dr. Erin C. O'Hara is affiliated with 9 sites of care and 4 medical groups
Dr. O'Hara's primary practice is Heywood Hospital in Gardner, Massachusetts, part of Heywood Healthcare. Dr. O'Hara is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is Heywood Hospital. Dmand AI also links Dr. O'Hara to 2 more hospitals, 3 home health agencies, 3 medical groups, 1 group practice or clinic and 1 hospice, each named with a free account.
UMass Memorial Medical Center - University CampusHeywood Hospital2 hospitalsNames with a free account3 home health agenciesNames with a free account3 medical groupsNames with a free account1 group practice or clinicName with a free account1 hospiceName with a free account
See all 13 affiliations for Dr. O'HaraSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Erin C. O'Hara's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Hara practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Heywood Hospital | Available with a free account |
| +8 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Erin C. O'Hara is one of 5,528 internists in Massachusetts
Internal medicine is Dr. O'Hara's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. O'Hara is board certified in internal medicine by the American Board of Internal Medicine. Dr. O'Hara is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, aneurysm, arthritis, asthma, atrial fibrillation and flutter, cardiomyopathy and cerebrovascular disease among the conditions Dr. O'Hara treats.
Internists near Dr. O'Hara
Counts of internists 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. Erin C. O'Hara billed Medicare for 248 services in 2024
CMS data shows 248 Medicare services from Dr. O'Hara across 4 procedure codes in 2024, for 129 Medicare patients. Medicare paid $10,444 for them. Every service was in an office.
Medicare services, 2024248
Medicare patients129
Paid by Medicare$10,444
Procedure codes4
Dr. O'Hara's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2142024: 17419%
- Surgery
- 2023: 932024: 4255%
- Other services
- 2023: 742024: 3257%
Dr. O'Hara compared with the Massachusetts median for internists, 2024
- Dr. O'Hara
- Massachusetts median
- Medicare services
- 248vs 43142% below
- Medicare patients
- 129vs 19434% below
- Part D claims
- 2,290vs 4025.7 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. O'Hara'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'Hara?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Hara and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Erin C. O'Hara treated 129 Medicare patients in 2024, average age 68
CMS counts 129 Medicare patients who saw Dr. O'Hara in 2024. The largest group is 65 to 74, with 73 patients. 70% of them have high cholesterol, and 67% have high blood pressure. 33% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Hara's median patient age at 61, with 65% women.
Medicare patients, 2024129
Average age68
Average risk score1.08
Also on Medicaid33%
Dr. O'Hara's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. O'Hara's Medicare patients by sex, 2024
- Women9271%
- Men3729%
Chronic conditions among Dr. O'Hara's Medicare patients, 2024
- High cholesterol70%
- High blood pressure67%
- Arthritis51%
- Mood disorders38%
- Anxiety36%
- Depression34%
- Diabetes30%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Hara'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
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Erin C. O'Hara wrote 2,740 Medicare Part D claims in 2024
In 2024, Dr. O'Hara wrote 2,740 Medicare Part D claims for 283 patients. 87% of them were for generic drugs. CMS names the drug for 2,290 of them, across 68 drugs with 11 or more claims each, at $257,204 in total drug cost. In 2023, CMS named 3,033 claims across 84 drugs.
Part D claims, 20242,740
Drugs named by CMS68
Total drug cost$257,204
Part D patients283
Dr. O'Hara's Part D claims by kind of drug, 2024
- Generic2,384 claims87%
- Brand-name and other356 claims13%
Dr. O'Hara's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. O'Hara's Part D claims, 2024
- Opioids5%134 of 2,740 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0332024: 2,29024%
Drugs named by CMS: 68 in 2024, 84 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Erin C. O'Hara offers telehealth to Medicare patients
Dr. O'Hara accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. O'Hara as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Erin C. O'Hara has 1 publication on record
Dmand AI links 1 paper to Dr. O'Hara in 2012.
Papers1
Recent publications by Dr. O'Hara
See who Dr. O'Hara researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Hara works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Erin C. O'Hara received $140 in industry payments from 2016 to 2025
CMS Open Payments shows 8 general payments to Dr. O'Hara from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Celgene Corporation paid the most, $40.
General payments to Dr. O'Hara by program year, 2016 to 2025
Companies that paid Dr. O'Hara the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Erin C. O'Hara graduated from UMass Chan Medical School
Dr. O'Hara graduated from UMass Chan Medical School in 2007.
- Medical school
- Board certified in internal medicine
- Board certified in obesity medicine
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Erin C. O'Hara accepts plans from 15 insurance carriers
Dr. O'Hara is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- Aspirus Health Plan
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. O'Hara accepts, by number of carriers
- HMO8
- PPO8
- Medicare6
- EPO4
- POS4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Erin C. O'Hara'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 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)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) |
| 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Erin C. O'Hara
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. Erin C. O'Hara's NPI number?
Dr. Erin C. O'Hara's NPI number is 1942407077. It was assigned on July 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Erin C. O'Hara?
Dr. Erin C. O'Hara is an internist in Gardner, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Erin C. O'Hara practice?
Dr. O'Hara practices at 242 Green Street, Gardner, MA 01440. Dr. O'Hara's primary practice is Heywood Hospital in Gardner, Massachusetts, part of Heywood Healthcare. Dmand AI also links Dr. O'Hara to 2 hospitals, 3 home health agencies, 3 medical groups, 1 group practice or clinic and 1 hospice.
What is Dr. Erin C. O'Hara's office phone number?
The practice phone on file for Dr. O'Hara is (978) 632-3420.
What is Dr. Erin C. O'Hara's medical license number?
Dr. O'Hara holds Massachusetts license 239461.
Which hospitals is Dr. Erin C. O'Hara affiliated with?
Dr. O'Hara practices at Heywood Hospital in Gardner, Massachusetts. Dr. O'Hara is also affiliated with UMass Memorial Medical Center - University Campus. Dmand AI links Dr. O'Hara to 2 more hospitals.
What medical group is Dr. Erin C. O'Hara part of?
Dr. O'Hara is linked to Heywood Hospital. Dmand AI links Dr. O'Hara to 3 more medical groups.
Does Dr. Erin C. O'Hara accept Medicare?
Yes. CMS data shows Dr. O'Hara billed Medicare for 248 services in 2024, and Dr. O'Hara accepts Medicare assignment.
Does Dr. Erin C. O'Hara offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. O'Hara as offering telehealth services.
How many Medicare patients does Dr. Erin C. O'Hara see?
CMS counts 129 Medicare patients who saw Dr. O'Hara in 2024, with an average age of 68.
Show 8 more questionsShow fewer questions
Is Dr. Erin C. O'Hara board certified?
Yes. Dr. O'Hara is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Erin C. O'Hara bill to Medicare?
In 2024, Dr. O'Hara's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and surgery: heart and blood vessels (36415).
Where did Dr. Erin C. O'Hara go to medical school?
Dr. O'Hara graduated from UMass Chan Medical School in 2007.
What drugs does Dr. Erin C. O'Hara prescribe most?
In 2024 Medicare Part D data, Dr. O'Hara's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Lisinopril.
Has Dr. Erin C. O'Hara received payments from drug or device companies?
CMS Open Payments shows $140 in general payments to Dr. O'Hara from 7 companies from 2016 to 2025. The largest total came from Celgene Corporation.
How long has Dr. Erin C. O'Hara been practicing?
Dr. O'Hara graduated from medical school in 2007, 19 years ago.
Does Dr. Erin C. O'Hara do research?
Dmand AI links 1 publication to Dr. O'Hara.
What insurance does Dr. Erin C. O'Hara accept?
Dr. O'Hara is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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