Dr. Karl Michael Grimmer Jr., MD
- Medicare services, 2024
- 92
- Medicare patients, 2024
- 139
- MIPS score, 2024
- 64
- Hospital affiliations
- 2
- Industry payments
- $587
- Practice address
- 81 Thomas Johnson Court, Suite B, Frederick, MD 21702
- Practice phone
- Call (240) 215-3070
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Physicians Surgery Center - Frederick
Surgery Center - Medicare-Certified · Frederick, Maryland
Find Dr. Grimmer's professional email, personal email and mobile number
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Dr. Karl Michael Grimmer Jr. is an anesthesiologist in Frederick, Maryland
Dr. Grimmer practices at Physicians Surgery Center - Frederick in Frederick, Maryland.
Dr. Grimmer's NPI, 1386842003, was assigned on July 3, 2007. Dr. Grimmer graduated from Indiana University School of Medicine in 2007. Dr. Grimmer holds District of Columbia license MD041865.
- NPI
- 1386842003NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244409233
- NPI enumeration date
- July 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (240) 215-3070
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- 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. Karl Michael Grimmer Jr. practices at Physicians Surgery Center - Frederick in Frederick, Maryland
Dr. Grimmer's primary practice is Physicians Surgery Center - Frederick, at 81 Thomas Johnson Court, Suite B, Frederick, MD 21702. The practice phone is (240) 215-3070.
- Physicians Surgery Center - Frederick81 Thomas Johnson Court, Suite B, Frederick, MD 21702Phone(240) 215-3070
Source: Dmand AI Affiliation Data
Dr. Karl Michael Grimmer Jr. is affiliated with 4 sites of care and 4 medical groups
Dr. Grimmer's primary practice is Physicians Surgery Center - Frederick in Frederick, Maryland. Dr. Grimmer is also affiliated with TidalHealth Peninsula Regional. The medical group on file is US Anesthesia Partners. Dmand AI also links Dr. Grimmer to 1 more hospital, 3 medical groups and 1 ambulatory surgery center, 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. Karl Michael Grimmer Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grimmer practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Physicians Surgery Center - Frederick | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karl Michael Grimmer Jr. is one of 965 anesthesiologists in Maryland
Anesthesiology is Dr. Grimmer's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dmand AI has Dr. Grimmer's licenses on file in 4 states: District of Columbia, Indiana, Maryland and Virginia.
Specialties and state licenses
- Anesthesiology, District of ColumbiaPrimary
- Indiana license
- Maryland license
- Virginia license
Anesthesiologists near Dr. Grimmer
Counts of anesthesiologists 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. Karl Michael Grimmer Jr. billed Medicare for 92 services in 2024
CMS data shows 92 Medicare services from Dr. Grimmer across 2 procedure codes in 2024, for 139 Medicare patients. Medicare paid $8,869 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grimmer's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Anesthesia
- 2021: 132024: 92608%
- Imaging
- 2021: 122024: 0100%
Dr. Grimmer compared with the Maryland median for anesthesiologists, 2024
- Dr. Grimmer
- Maryland median
- Medicare services
- 92vs 1019% below
- Medicare patients
- 139vs 17621% below
Medians across 918 anesthesiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Grimmer'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. Grimmer and other anesthesiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karl Michael Grimmer Jr. treated 139 Medicare patients in 2024, average age 74
CMS counts 139 Medicare patients who saw Dr. Grimmer in 2024. The largest group is 65 to 74, with 75 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.82, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Grimmer's median patient age at 64, with 60% women.
Dr. Grimmer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Grimmer's Medicare patients by sex, 2024
- Women8460%
- Men5540%
Chronic conditions among Dr. Grimmer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Ischemic heart disease29%
- Diabetes27%
- Anxiety23%
- Cancer20%
- Osteoporosis18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grimmer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karl Michael Grimmer Jr. scored 64 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 64 out of 100 for Dr. Grimmer for performance year 2024, reported as part of a group. Dr. Grimmer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Grimmer's MIPS scores, performance year 2024
- 64of 100Final score
- 57.5of 100Quality
- 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. Karl Michael Grimmer Jr. received $587 in industry payments from 2016 to 2025
CMS Open Payments shows 27 general payments to Dr. Grimmer from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 94% of the total. Mallinckrodt LLC paid the most, $252.
General payments to Dr. Grimmer by program year, 2016 to 2025
General payments to Dr. Grimmer by kind, 2016 to 2025
- Food and beverage$55094%
- Consulting fees$224%
- Education$163%
Companies that paid Dr. Grimmer 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. Karl Michael Grimmer Jr. graduated from Indiana University School of Medicine
Dr. Grimmer graduated from Indiana University School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karl Michael Grimmer Jr.'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) |
| 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) |
| 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. Karl Michael Grimmer Jr.
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. Karl Michael Grimmer Jr.'s NPI number?
Dr. Karl Michael Grimmer Jr.'s NPI number is 1386842003. It was assigned on July 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Karl Michael Grimmer Jr.?
Dr. Karl Michael Grimmer Jr. is an anesthesiologist in Frederick, Maryland. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Karl Michael Grimmer Jr. practice?
Dr. Grimmer practices at 81 Thomas Johnson Court, Suite B, Frederick, MD 21702. Dr. Grimmer's primary practice is Physicians Surgery Center - Frederick in Frederick, Maryland. Dmand AI also links Dr. Grimmer to 1 hospital, 3 medical groups and 1 ambulatory surgery center.
What is Dr. Karl Michael Grimmer Jr.'s office phone number?
The practice phone on file for Dr. Grimmer is (240) 215-3070.
What is Dr. Karl Michael Grimmer Jr.'s medical license number?
Dr. Grimmer holds District of Columbia license MD041865, one of the licenses on file in 4 states.
Which states has Dr. Karl Michael Grimmer Jr. been licensed in?
Dmand AI has state licenses on file for Dr. Grimmer in District of Columbia, Indiana, Maryland and Virginia.
Which hospitals is Dr. Karl Michael Grimmer Jr. affiliated with?
Dr. Grimmer is affiliated with TidalHealth Peninsula Regional. Dmand AI links Dr. Grimmer to 1 more hospital.
What medical group is Dr. Karl Michael Grimmer Jr. part of?
Dr. Grimmer is linked to US Anesthesia Partners. Dmand AI links Dr. Grimmer to 3 more medical groups.
Does Dr. Karl Michael Grimmer Jr. accept Medicare?
Yes. CMS data shows Dr. Grimmer billed Medicare for 92 services in 2024, and Dr. Grimmer accepts Medicare assignment.
What is Dr. Karl Michael Grimmer Jr.'s MIPS score?
Dr. Grimmer's MIPS final score for performance year 2024 is 64 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Karl Michael Grimmer Jr. see?
CMS counts 139 Medicare patients who saw Dr. Grimmer in 2024, with an average age of 74.
What services does Dr. Karl Michael Grimmer Jr. bill to Medicare?
In 2024, Dr. Grimmer's most billed Medicare services were anesthesia (00142) and anesthesia (01810).
Where did Dr. Karl Michael Grimmer Jr. go to medical school?
Dr. Grimmer graduated from Indiana University School of Medicine in 2007.
Has Dr. Karl Michael Grimmer Jr. received payments from drug or device companies?
CMS Open Payments shows $587 in general payments to Dr. Grimmer from 6 companies from 2016 to 2025. The largest total came from Mallinckrodt LLC.
How long has Dr. Karl Michael Grimmer Jr. been practicing?
Dr. Grimmer graduated from medical school in 2007, 19 years ago.
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