Dr. Isabella Marla Grumbach, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 145
- Publications
- 68
- MIPS score, 2024
- 80
- Practice address
- 1200 Childrens Ave, Oklahoma City, OK 73104
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ou Medical Center-The Children's Ho - Rad CT - HOPD
Acute Care Hospital outpatient department · Oklahoma City, Oklahoma
Find Dr. Grumbach'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. Isabella Marla Grumbach is a cardiologist in Oklahoma City, Oklahoma
Dr. Grumbach practices at Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma.
Dr. Grumbach's NPI, 1730108879, was assigned on July 19, 2006. Dr. Grumbach holds Iowa license 36622.
- NPI
- 1730108879NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7113921628
- NPI enumeration date
- July 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Isabella Marla Grumbach practices at Ou Medical Center-the Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma
Dr. Grumbach's primary practice is Ou Medical Center-the Children's Ho - Rad CT - HOPD, at 1200 Childrens Ave, Oklahoma City, OK 73104.
- Ou Medical Center-the Children's Ho - Rad CT - HOPD1200 Childrens Ave, Oklahoma City, OK 73104
Source: Dmand AI Affiliation Data
Dr. Isabella Marla Grumbach is affiliated with 3 sites of care and 1 medical group
Dr. Grumbach's primary practice is Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma. Dr. Grumbach is also affiliated with OU Health University of Oklahoma Medical Center. The medical group on file is OU Health. Dmand AI also links Dr. Grumbach to 1 more hospital, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Isabella Marla Grumbach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grumbach practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ou Medical Center-The Children's Ho - Rad CT - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Isabella Marla Grumbach is one of 186 cardiologists in Oklahoma
Cardiovascular disease is Dr. Grumbach's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Grumbach is licensed in Iowa.
Specialties and state licenses
- Cardiovascular disease, IowaPrimary
Cardiologists near Dr. Grumbach
Counts of cardiologists 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. Isabella Marla Grumbach billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Grumbach across 1 procedure code in 2024, all of them office visits, for 20 Medicare patients. Medicare paid $1,101 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grumbach's Medicare services by type, 2020 to 2024
- 2020
- 2024
- Office and hospital visits
- 2020: 02024: 16
- Tests and treatments
- 2020: 232024: 0100%
Dr. Grumbach compared with the Oklahoma median for cardiologists, 2024
- Dr. Grumbach
- Oklahoma median
- Medicare services
- 16vs 2,25199% below
- Medicare patients
- 20vs 1,06498% below
- Part D claims
- 68vs 2,41797% below
Medians across 176 cardiologists in Oklahoma with Dmand AI profiles that report each measure.
Dr. Grumbach'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. Grumbach?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grumbach and other cardiologists in Oklahoma.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Isabella Marla Grumbach treated 20 Medicare patients in 2024, average age 74
CMS counts 20 Medicare patients who saw Dr. Grumbach in 2024. 75% of them have heart failure, and 75% have high blood pressure. Their average risk score is 2.77, 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. Grumbach's median patient age at 71, with 42% women.
Chronic conditions among Dr. Grumbach's Medicare patients, 2024
- Heart failure75%
- High blood pressure75%
- High cholesterol75%
- Atrial fibrillation55%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grumbach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women42%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Isabella Marla Grumbach wrote 145 Medicare Part D claims in 2024
In 2024, Dr. Grumbach wrote 145 Medicare Part D claims for 19 patients. 75% of them were for generic drugs. CMS names the drug for 68 of them, across 3 drugs with 11 or more claims each, at $13,082 in total drug cost. In 2023, CMS named 18 claims across 1 drug.
Dr. Grumbach's Part D claims by kind of drug, 2024
- Generic109 claims75%
- Brand-name36 claims25%
Dr. Grumbach'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 182024: 68278%
Drugs named by CMS: 3 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. Isabella Marla Grumbach scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Grumbach for performance year 2024, reported as part of a group. Dr. Grumbach accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Grumbach's MIPS scores, performance year 2024
- 80of 100Final score
- 75.7of 100Quality
- 78of 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Isabella Marla Grumbach has 68 publications on record
Dmand AI links 68 papers to Dr. Grumbach, published from 2010 to 2025. 2022 was the busiest year, with 11. The most frequent topics are Calcium-Calmodulin-Dependent Protein Kinase Type 2, Calcium and Mice, Inbred C57BL. Dr. Grumbach has published most often in Arterioscler Thromb Vasc Biol. Dr. Grumbach's most frequent co-authors are Randy H. Kardon, MD, PhD, Anand Prasad, MD and Robert M. Weiss.
Dr. Grumbach's papers by year, 2016 to 2025
Topics Dr. Grumbach writes about most
- Calcium-Calmodulin-Dependent Protein Kinase Type 2
- Calcium
- Mice, Inbred C57BL
- Cells, Cultured
- Disease Models, Animal
- Mitochondria
- Muscle, Smooth, Vascular
- Mice, Knockout
Dr. Grumbach's most frequent co-authors
- Randy H. Kardon, MD, PhD8 shared papers
- Anand Prasad, MD7 shared papers
- Robert M. Weiss6 shared papers
Recent publications by Dr. Grumbach
See who Dr. Grumbach researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Grumbach works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Isabella Marla Grumbach received $22 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Grumbach from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $22.
Companies that paid Dr. Grumbach the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Isabella Marla Grumbach'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 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) |
| 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. Isabella Marla Grumbach
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. Isabella Marla Grumbach's NPI number?
Dr. Isabella Marla Grumbach's NPI number is 1730108879. It was assigned on July 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Isabella Marla Grumbach?
Dr. Isabella Marla Grumbach is a cardiologist in Oklahoma City, Oklahoma. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Isabella Marla Grumbach practice?
Dr. Grumbach practices at 1200 Childrens Ave, Oklahoma City, OK 73104. Dr. Grumbach's primary practice is Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma. Dmand AI also links Dr. Grumbach to 1 hospital.
What is Dr. Isabella Marla Grumbach's medical license number?
Dr. Grumbach holds Iowa license 36622.
Which hospitals is Dr. Isabella Marla Grumbach affiliated with?
Dr. Grumbach is affiliated with OU Health University of Oklahoma Medical Center. Dmand AI links Dr. Grumbach to 1 more hospital.
What medical group is Dr. Isabella Marla Grumbach part of?
Dr. Grumbach is linked to OU Health.
Does Dr. Isabella Marla Grumbach accept Medicare?
Yes. CMS data shows Dr. Grumbach billed Medicare for 16 services in 2024, and Dr. Grumbach accepts Medicare assignment.
What is Dr. Isabella Marla Grumbach's MIPS score?
Dr. Grumbach's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
How many Medicare patients does Dr. Isabella Marla Grumbach see?
CMS counts 20 Medicare patients who saw Dr. Grumbach in 2024, with an average age of 74.
What services does Dr. Isabella Marla Grumbach bill to Medicare?
In 2024, Dr. Grumbach's most billed Medicare services were office visit, established patient (99214).
Show 5 more questionsShow fewer questions
What drugs does Dr. Isabella Marla Grumbach prescribe most?
In 2024 Medicare Part D data, Dr. Grumbach's most prescribed drugs by claims were Metoprolol Succinate, Lisinopril and Entresto.
Has Dr. Isabella Marla Grumbach received payments from drug or device companies?
CMS Open Payments shows $22 in general payments to Dr. Grumbach from 1 company from 2016 to 2016. The largest total came from Amgen Inc.
How long has Dr. Isabella Marla Grumbach been practicing?
Dr. Grumbach graduated from medical school in 1992, 34 years ago.
Does Dr. Isabella Marla Grumbach do research?
Dmand AI links 68 publications to Dr. Grumbach, published from 2010 to 2025.
Who does Dr. Isabella Marla Grumbach publish with?
Dr. Grumbach's most frequent co-authors are Randy H. Kardon, MD, PhD (8 shared papers), Anand Prasad, MD (7 shared papers) and Robert M. Weiss (6 shared papers).
Selling to cardiovascular disease practices?
See cardiologists in Oklahoma by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card