Dr. Benjamin Grajales, MD
- Medicare services, 2024
- 270
- Medicare patients, 2024
- 158
- Part D claims, 2024
- 54
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Practice address
- 60 Hospital Road, Leominster, MA 01453
- Practice phone
- Call (978) 466-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Grajales' professional email, personal email and mobile number
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Dr. Benjamin Grajales is a general surgeon in Leominster, Massachusetts
Dr. Grajales practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care.
Dr. Grajales' NPI, 1427097419, was assigned on June 5, 2006. Dr. Grajales graduated from Harvard Medical School in 1987. Dr. Grajales holds Massachusetts license 70381.
- NPI
- 1427097419NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406991694
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 466-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Benjamin Grajales practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts
Dr. Grajales' primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital, at 60 Hospital Road, Leominster, MA 01453 in Worcester County. The practice phone is (978) 466-2000.
- UMass Memorial Health - HealthAlliance-Clinton Hospital60 Hospital Road, Leominster, MA 01453 · Worcester CountyPhone(978) 466-2000
Source: Dmand AI Affiliation Data
Dr. Benjamin Grajales is affiliated with 2 sites of care
Dr. Grajales' primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care. Dmand AI also links Dr. Grajales to 1 physician office, named with a free account. Dr. Grajales' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Benjamin Grajales' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grajales practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UMass Memorial Health - HealthAlliance-Clinton Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Benjamin Grajales is one of 732 general surgeons in Massachusetts
Surgery is Dr. Grajales' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Grajales is licensed in Massachusetts.
Specialties and state licenses
- Surgery, MassachusettsPrimary
General surgeons near Dr. Grajales
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. Benjamin Grajales billed Medicare for 270 services in 2024
CMS data shows 270 Medicare services from Dr. Grajales across 7 procedure codes in 2024, for 158 Medicare patients. Medicare paid $20,279 for them.
Dr. Grajales' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1972024: 24625%
- Surgery
- 2023: 172024: 2441%
Where Dr. Grajales' Medicare services took place, 2024
- In an office9636%
- In a facility17464%
Dr. Grajales compared with the Massachusetts median for general surgeons, 2024
- Dr. Grajales
- Massachusetts median
- Medicare services
- 270vs 20035% above
- Medicare patients
- 158vs 152Close to median
- Part D claims
- 23vs 22Close to median
Medians across 688 general surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Grajales' 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. Grajales and other general surgeons in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Benjamin Grajales treated 158 Medicare patients in 2024, average age 71
CMS counts 158 Medicare patients who saw Dr. Grajales in 2024. The largest group is 65 to 74, with 63 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 44% are also on Medicaid. Their average risk score is 1.88, 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. Grajales' median patient age at 59, with 45% women.
Dr. Grajales' Medicare patients by age, 2024
Dr. Grajales' Medicare patients by sex, 2024
- Women7246%
- Men8654%
Chronic conditions among Dr. Grajales' Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Arthritis46%
- Anxiety41%
- Mood disorders41%
- Chronic kidney disease36%
- Depression35%
- COPD29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grajales' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Benjamin Grajales wrote 54 Medicare Part D claims in 2024
In 2024, Dr. Grajales wrote 54 Medicare Part D claims for 38 patients. 98% of them were for generic drugs. CMS names the drug for 23 of them, across 1 drug with 11 or more claims each, at $27 in total drug cost. In 2023, CMS named 32 claims across 1 drug.
Dr. Grajales' Part D claims by kind of drug, 2024
- Generic53 claims98%
- Brand-name and other1 claims2%
Dr. Grajales' 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. Grajales' Part D claims, 2024
- Opioids56%30 of 54 claims
- Antibiotics20%11 of 54 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: 322024: 2328%
Drugs named by CMS: 1 in 2024, 1 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. Benjamin Grajales 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. Grajales for performance year 2024, reported through an alternative payment model (APM). Dr. Grajales accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 46 procedures of colonoscopy by Dr. Grajales, more than 62% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Grajales' 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.
Where Dr. Grajales ranks in Medicare procedure volume
- Colonoscopy
- 62nd percentile46 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Benjamin Grajales received $193 in industry payments from 2017 to 2018
CMS Open Payments shows 4 general payments to Dr. Grajales from 2 drug and device companies from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. Olympus Corporation of the Americas paid the most, $131.
General payments to Dr. Grajales by program year, 2017 to 2018
Companies that paid Dr. Grajales the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Benjamin Grajales graduated from Harvard Medical School
Dr. Grajales graduated from Harvard Medical School in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Benjamin Grajales'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| 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. Benjamin Grajales
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. Benjamin Grajales' NPI number?
Dr. Benjamin Grajales' NPI number is 1427097419. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Benjamin Grajales?
Dr. Benjamin Grajales is a general surgeon in Leominster, Massachusetts. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Benjamin Grajales practice?
Dr. Grajales practices at 60 Hospital Road, Leominster, MA 01453. Dr. Grajales' primary practice is UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts, part of UMass Memorial Health Care. Dmand AI also links Dr. Grajales to 1 physician office.
What is Dr. Benjamin Grajales' office phone number?
The practice phone on file for Dr. Grajales is (978) 466-2000.
What is Dr. Benjamin Grajales' medical license number?
Dr. Grajales holds Massachusetts license 70381.
Which hospitals is Dr. Benjamin Grajales affiliated with?
Dr. Grajales practices at UMass Memorial Health - HealthAlliance-Clinton Hospital in Leominster, Massachusetts.
Does Dr. Benjamin Grajales accept Medicare?
Yes. CMS data shows Dr. Grajales billed Medicare for 270 services in 2024, and Dr. Grajales accepts Medicare assignment.
What is Dr. Benjamin Grajales' MIPS score?
Dr. Grajales' 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. Benjamin Grajales see?
CMS counts 158 Medicare patients who saw Dr. Grajales in 2024, with an average age of 71.
What services does Dr. Benjamin Grajales bill to Medicare?
In 2024, Dr. Grajales' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
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Where did Dr. Benjamin Grajales go to medical school?
Dr. Grajales graduated from Harvard Medical School in 1987.
What drugs does Dr. Benjamin Grajales prescribe most?
In 2024 Medicare Part D data, Dr. Grajales' most prescribed drugs by claims were Tramadol HCl.
Has Dr. Benjamin Grajales received payments from drug or device companies?
CMS Open Payments shows $193 in general payments to Dr. Grajales from 2 companies from 2017 to 2018. The largest total came from Olympus Corporation of the Americas.
How long has Dr. Benjamin Grajales been practicing?
Dr. Grajales graduated from medical school in 1987, 39 years ago.
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