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Aneurysm, FalseClavicleFracture Dislocation
Dr. Errol S. Mortimer, MD
NPI1851375984PAC ID0042254211
- Medicare services, 2024
- 18
- Medicare patients, 2024
- 37
- Publications
- 3
- MIPS score, 2024
- 100
- Hospital affiliations
- 2
- Practice address
- 55 North Ave, Mendon, MA 01756
- Practice phone
- Call (508) 334-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Umass Memorial Medical Center
Mendon, Massachusetts
Find Dr. Mortimer'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. Errol S. Mortimer is an orthopedic surgeon in Mendon, Massachusetts
Dr. Mortimer practices at Umass Memorial Medical Center in Mendon, Massachusetts.
Dr. Mortimer's NPI, 1851375984, was assigned on December 1, 2005. Dr. Mortimer holds Massachusetts license 81083.
NPI and contact details
- NPI
- 1851375984NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042254211
- NPI enumeration date
- December 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (508) 334-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Errol S. Mortimer practices at Umass Memorial Medical Center in Mendon, Massachusetts
Dr. Mortimer's primary practice is Umass Memorial Medical Center, at 55 North Ave, Mendon, MA 01756 in Worcester County. The practice phone is (508) 334-1000.
- Umass Memorial Medical Center55 North Ave, Mendon, MA 01756 · Worcester CountyPhone(508) 334-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Errol S. Mortimer is affiliated with 3 sites of care and 2 medical groups
Dr. Mortimer's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. Dr. Mortimer is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Dr. Mortimer to 1 more hospital and 1 medical group, each named with a free account.
Umass Memorial Medical CenterPrimary
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. Errol S. Mortimer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mortimer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Umass Memorial Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Errol S. Mortimer is one of 593 orthopedic surgeons in Massachusetts
Orthopaedic surgery is Dr. Mortimer's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Mortimer is licensed in Massachusetts.
Specialties and state licenses
- Orthopaedic surgery, MassachusettsPrimary
Orthopedic surgeons near Dr. Mortimer
Counts of orthopedic 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. Errol S. Mortimer billed Medicare for 18 services in 2024
CMS data shows 18 Medicare services from Dr. Mortimer across 1 procedure code in 2024, all of them office visits, for 37 Medicare patients. Medicare paid $833 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202418
Medicare patients37
Paid by Medicare$833
Procedure codes1
Dr. Mortimer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 202024: 1810%
Dr. Mortimer compared with the Massachusetts median for orthopedic surgeons, 2024
- Dr. Mortimer
- Massachusetts median
- Medicare services
- 18vs 67297% below
- Medicare patients
- 37vs 30288% below
Medians across 543 orthopedic surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Mortimer'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. Mortimer and other orthopedic surgeons in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Errol S. Mortimer treated 37 Medicare patients in 2024, average age 62
CMS counts 37 Medicare patients who saw Dr. Mortimer in 2024. The largest group is under 65, with 19 patients. 68% of them have high cholesterol, and 65% have high blood pressure. 57% are also on Medicaid. Their average risk score is 2.09, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Mortimer's median patient age at 14, with 47% women.
Medicare patients, 202437
Average age62
Average risk score2.09
Also on Medicaid57%
Dr. Mortimer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mortimer's Medicare patients by sex, 2024
- Women2259%
- Men1541%
Chronic conditions among Dr. Mortimer's Medicare patients, 2024
- High cholesterol68%
- High blood pressure65%
- Arthritis57%
- Anxiety46%
- Chronic kidney disease35%
- Mood disorders35%
- Osteoporosis35%
- Diabetes32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mortimer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 14
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Errol S. Mortimer scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Mortimer for performance year 2024, reported through an alternative payment model (APM). Dr. Mortimer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mortimer's MIPS scores, performance year 2024
- 100of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Errol S. Mortimer has 3 publications on record
Dmand AI links 3 papers to Dr. Mortimer, published from 2022 to 2024. 2024 was the busiest year, with 2. Dr. Mortimer's most frequent co-authors are Emily Yunxi Fan, MD, Luke David Latario, MD and Ankur Shah Narain, MD.
Papers3
Years published2022 to 2024
Dr. Mortimer's most frequent co-authors
- Emily Yunxi Fan, MD1 shared paper
- Luke David Latario, MD1 shared paper
- Ankur Shah Narain, MD1 shared paper
Recent publications by Dr. Mortimer
J Pediatr Orthop B
Fracture Fixation, InternalFracture Fixation, IntramedullaryHumeral Fractures
See who Dr. Mortimer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mortimer works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Errol S. Mortimer received $381 in industry payments from 2019 to 2025
CMS Open Payments shows 14 general payments to Dr. Mortimer from 3 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $202.
General payments to Dr. Mortimer by program year, 2019 to 2025
Companies that paid Dr. Mortimer the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Errol S. Mortimer'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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) |
| 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. Errol S. Mortimer
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. Errol S. Mortimer's NPI number?
Dr. Errol S. Mortimer's NPI number is 1851375984. It was assigned on December 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Errol S. Mortimer?
Dr. Errol S. Mortimer is an orthopedic surgeon in Mendon, Massachusetts. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Errol S. Mortimer practice?
Dr. Mortimer practices at 55 North Ave, Mendon, MA 01756. Dr. Mortimer's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. Dmand AI also links Dr. Mortimer to 1 hospital and 1 medical group.
What is Dr. Errol S. Mortimer's office phone number?
The practice phone on file for Dr. Mortimer is (508) 334-1000.
What is Dr. Errol S. Mortimer's medical license number?
Dr. Mortimer holds Massachusetts license 81083.
Which hospitals is Dr. Errol S. Mortimer affiliated with?
Dr. Mortimer is affiliated with UMass Memorial Medical Center - University Campus. Dmand AI links Dr. Mortimer to 1 more hospital.
What medical group is Dr. Errol S. Mortimer part of?
Dr. Mortimer is linked to UMass Memorial Medical Group. Dmand AI links Dr. Mortimer to 1 more medical group.
Does Dr. Errol S. Mortimer accept Medicare?
Yes. CMS data shows Dr. Mortimer billed Medicare for 18 services in 2024, and Dr. Mortimer accepts Medicare assignment.
What is Dr. Errol S. Mortimer's MIPS score?
Dr. Mortimer's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Errol S. Mortimer see?
CMS counts 37 Medicare patients who saw Dr. Mortimer in 2024, with an average age of 62.
Show 5 more questionsShow fewer questions
What services does Dr. Errol S. Mortimer bill to Medicare?
In 2024, Dr. Mortimer's most billed Medicare services were office visit, established patient (99213).
Has Dr. Errol S. Mortimer received payments from drug or device companies?
CMS Open Payments shows $381 in general payments to Dr. Mortimer from 3 companies from 2019 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Errol S. Mortimer been practicing?
Dr. Mortimer graduated from medical school in 1986, 40 years ago.
Does Dr. Errol S. Mortimer do research?
Dmand AI links 3 publications to Dr. Mortimer, published from 2022 to 2024.
Who does Dr. Errol S. Mortimer publish with?
Dr. Mortimer's most frequent co-authors are Emily Yunxi Fan, MD (1 shared paper), Luke David Latario, MD (1 shared paper) and Ankur Shah Narain, MD (1 shared paper).
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