Dr. Karen Renee Grassie, MD
- Medicare services, 2024
- 235
- Medicare patients, 2024
- 169
- Part D claims, 2024
- 101
- Hospital affiliations
- 4
- Industry payments
- $450
- Practice address
- 36000 Euclid Ave, Willoughby, OH 44094
- Practice phone
- Call (440) 286-8908
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UH Lake West Medical Center - Urgent Care
Urgent Care Center · Willoughby, Ohio
Find Dr. Grassie'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. Karen Renee Grassie is a general surgeon in Willoughby, Ohio
Dr. Grassie practices at UH Lake West Medical Center - Urgent Care in Willoughby, Ohio.
Dr. Grassie's NPI, 1417056516, was assigned on September 22, 2006. Dr. Grassie graduated from Medical College of Ohio in 1997. Dr. Grassie holds Ohio license 35-075055-G.
- NPI
- 1417056516NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315908928
- NPI enumeration date
- September 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (440) 286-8908
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen Renee Grassie practices at UH Lake West Medical Center - Urgent Care in Willoughby, Ohio
Dr. Grassie's primary practice is UH Lake West Medical Center - Urgent Care, at 36000 Euclid Ave, Willoughby, OH 44094. The practice phone is (440) 286-8908.
- UH Lake West Medical Center - Urgent Care36000 Euclid Ave, Willoughby, OH 44094Phone(440) 286-8908
Source: Dmand AI Affiliation Data
Dr. Karen Renee Grassie is affiliated with 9 sites of care and 2 medical groups
Dr. Grassie's primary practice is UH Lake West Medical Center - Urgent Care in Willoughby, Ohio. Dr. Grassie is also affiliated with University Hospitals Cleveland Medical Center. The medical group on file is University Eyecare. Dmand AI also links Dr. Grassie to 3 more hospitals, 2 group practices and clinics, 1 physician office, 1 urgent care 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 Dr. Karen Renee Grassie's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grassie practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UH Lake West Medical Center - Urgent Care | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karen Renee Grassie is one of 1,056 general surgeons in Ohio
Surgery is Dr. Grassie's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Grassie is licensed in Ohio.
Specialties and state licenses
- Surgery, OhioPrimary
General surgeons near Dr. Grassie
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. Karen Renee Grassie billed Medicare for 235 services in 2024
CMS data shows 235 Medicare services from Dr. Grassie across 5 procedure codes in 2024, for 169 Medicare patients. Medicare paid $15,980 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grassie's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2582024: 2359%
Dr. Grassie compared with the Ohio median for general surgeons, 2024
- Dr. Grassie
- Ohio median
- Medicare services
- 235vs 16840% above
- Medicare patients
- 169vs 12733% above
- Part D claims
- 59vs 4628% above
Medians across 1,031 general surgeons in Ohio with Dmand AI profiles that report each measure.
Dr. Grassie'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. Grassie and other general surgeons in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karen Renee Grassie treated 169 Medicare patients in 2024, average age 74
CMS counts 169 Medicare patients who saw Dr. Grassie in 2024. The largest group is 65 to 74, with 87 patients. 75% of them have high cholesterol, and 70% have high blood pressure. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Grassie's median patient age at 70, with 75% women.
Dr. Grassie's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Grassie's Medicare patients by sex, 2024
- Women14385%
- Men2615%
Chronic conditions among Dr. Grassie's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Cancer63%
- Arthritis50%
- Diabetes25%
- Ischemic heart disease24%
- Anxiety22%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grassie's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women75%
- Men24%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karen Renee Grassie wrote 101 Medicare Part D claims in 2024
In 2024, Dr. Grassie wrote 101 Medicare Part D claims for 74 patients. 98% of them were for generic drugs. CMS names the drug for 59 of them, across 2 drugs with 11 or more claims each, at $261 in total drug cost. In 2023, CMS named 128 claims across 4 drugs.
Dr. Grassie's Part D claims by kind of drug, 2024
- Generic99 claims98%
- Brand-name and other2 claims2%
Dr. Grassie'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. Grassie's Part D claims, 2024
- Opioids64%65 of 101 claims
- Antibiotics17%17 of 101 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: 1282024: 5954%
Drugs named by CMS: 2 in 2024, 4 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. Karen Renee Grassie ranks in the 92nd percentile for hernia repair - groin (open) in Medicare
Dr. Grassie accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 13 procedures of hernia repair - groin (open) by Dr. Grassie, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Grassie ranks in Medicare procedure volume
- Mastectomy
- 72nd percentile15 procedures
- Colonoscopy
- 44th percentile15 procedures
- Hernia repair - groin (open)
- 92nd percentile13 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)
Removal of skin lesions: 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)
Skin biopsy: 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); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Karen Renee Grassie received $450 in industry payments from 2016 to 2025
CMS Open Payments shows 21 general payments to Dr. Grassie from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pacira Pharmaceuticals Incorporated paid the most, $125.
General payments to Dr. Grassie by program year, 2016 to 2025
Companies that paid Dr. Grassie 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. Karen Renee Grassie graduated from Medical College of Ohio
Dr. Grassie graduated from Medical College of Ohio in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karen Renee Grassie'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)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. Karen Renee Grassie
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. Karen Renee Grassie's NPI number?
Dr. Karen Renee Grassie's NPI number is 1417056516. It was assigned on September 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen Renee Grassie?
Dr. Karen Renee Grassie is a general surgeon in Willoughby, Ohio. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Karen Renee Grassie practice?
Dr. Grassie practices at 36000 Euclid Ave, Willoughby, OH 44094. Dr. Grassie's primary practice is UH Lake West Medical Center - Urgent Care in Willoughby, Ohio. Dmand AI also links Dr. Grassie to 3 hospitals, 2 group practices and clinics, 1 physician office, 1 urgent care center and 1 medical group.
What is Dr. Karen Renee Grassie's office phone number?
The practice phone on file for Dr. Grassie is (440) 286-8908.
What is Dr. Karen Renee Grassie's medical license number?
Dr. Grassie holds Ohio license 35-075055-G.
Which hospitals is Dr. Karen Renee Grassie affiliated with?
Dr. Grassie is affiliated with University Hospitals Cleveland Medical Center. Dmand AI links Dr. Grassie to 3 more hospitals.
What medical group is Dr. Karen Renee Grassie part of?
Dr. Grassie is linked to University Eyecare. Dmand AI links Dr. Grassie to 1 more medical group.
Does Dr. Karen Renee Grassie accept Medicare?
Yes. CMS data shows Dr. Grassie billed Medicare for 235 services in 2024, and Dr. Grassie accepts Medicare assignment.
How many Medicare patients does Dr. Karen Renee Grassie see?
CMS counts 169 Medicare patients who saw Dr. Grassie in 2024, with an average age of 74.
What services does Dr. Karen Renee Grassie bill to Medicare?
In 2024, Dr. Grassie's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and hospital inpatient care (99232).
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Where did Dr. Karen Renee Grassie go to medical school?
Dr. Grassie graduated from Medical College of Ohio in 1997.
What drugs does Dr. Karen Renee Grassie prescribe most?
In 2024 Medicare Part D data, Dr. Grassie's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Oxycodone-Acetaminophen.
Has Dr. Karen Renee Grassie received payments from drug or device companies?
CMS Open Payments shows $450 in general payments to Dr. Grassie from 8 companies from 2016 to 2025. The largest total came from Pacira Pharmaceuticals Incorporated.
How long has Dr. Karen Renee Grassie been practicing?
Dr. Grassie graduated from medical school in 1997, 29 years ago.
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