Dr. Catherine F. Gentemann, MD
- Medicare services, 2024
- 956
- Medicare patients, 2024
- 251
- Part D claims, 2024
- 4,547
- Hospital affiliations
- 3
- Industry payments
- $634
- Practice address
- 17762 Beach Blvd, Huntington Beach, CA 92647
- Practice phone
- Call (877) 696-3622
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Memorialcare Medical Foundation
Huntington Beach, California
Find Dr. Gentemann'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. Catherine F. Gentemann is an internist in Huntington Beach, California
Dr. Gentemann practices at Memorialcare Medical Foundation in Huntington Beach, California.
Dr. Gentemann's NPI, 1215043526, was assigned on August 21, 2006. Dr. Gentemann graduated from Loyola University Chicago Stritch School of Medicine in 1993. Dr. Gentemann holds California license G081721.
- NPI
- 1215043526NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204918766
- NPI enumeration date
- August 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (877) 696-3622
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Catherine F. Gentemann practices at Memorialcare Medical Foundation in Huntington Beach, California
Dr. Gentemann's primary practice is Memorialcare Medical Foundation, at 17762 Beach Blvd, Huntington Beach, CA 92647 in Orange County. The practice phone is (877) 696-3622.
- Memorialcare Medical Foundation17762 Beach Blvd, Huntington Beach, CA 92647 · Orange CountyPhone(877) 696-3622
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Catherine F. Gentemann is affiliated with 7 sites of care and 1 medical group
Dr. Gentemann's primary practice is Memorialcare Medical Foundation in Huntington Beach, California. Dr. Gentemann is also affiliated with Hoag Hospital Newport Beach. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Gentemann to 2 more hospitals, 2 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Catherine F. Gentemann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gentemann practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorialcare Medical Foundation | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine F. Gentemann is one of 16,751 internists in California
Internal medicine is Dr. Gentemann's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Gentemann is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, adjustment disease, anxiety, aortic atherosclerois, arthritis, asthma and atrial fibrillation and flutter among the conditions Dr. Gentemann treats.
Internists near Dr. Gentemann
Counts of internists 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. Catherine F. Gentemann billed Medicare for 956 services in 2024
CMS data shows 956 Medicare services from Dr. Gentemann across 9 procedure codes in 2024, for 251 Medicare patients. Medicare paid $32,151 for them. Every service was in an office.
Dr. Gentemann's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6022024: 44227%
- Surgery
- 2023: 2982024: 25016%
- Other services
- 2023: 1232024: 23490%
- Tests and treatments
- 2023: 832024: 3064%
- Lab and pathology
- 2023: 202024: 0100%
Dr. Gentemann compared with the California median for internists, 2024
- Dr. Gentemann
- California median
- Medicare services
- 956vs 3612.6 times
- Medicare patients
- 251vs 15166% above
- Part D claims
- 3,915vs 4219.3 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Gentemann'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. Gentemann?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gentemann and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Catherine F. Gentemann treated 251 Medicare patients in 2024, average age 76
CMS counts 251 Medicare patients who saw Dr. Gentemann in 2024. The largest group is 75 to 84, with 118 patients. 67% of them have high blood pressure, and 63% have high cholesterol. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gentemann's median patient age at 64, with 73% women.
Dr. Gentemann's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gentemann's Medicare patients by sex, 2024
- Women18875%
- Men6325%
Chronic conditions among Dr. Gentemann's Medicare patients, 2024
- High blood pressure67%
- High cholesterol63%
- Arthritis43%
- Diabetes19%
- Mood disorders19%
- Anxiety18%
- Chronic kidney disease18%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gentemann'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
- Women73%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Catherine F. Gentemann wrote 4,547 Medicare Part D claims in 2024
In 2024, Dr. Gentemann wrote 4,547 Medicare Part D claims for 395 patients. 88% of them were for generic drugs. CMS names the drug for 3,915 of them, across 101 drugs with 11 or more claims each, at $271,531 in total drug cost. In 2023, CMS named 3,512 claims across 92 drugs.
Dr. Gentemann's Part D claims by kind of drug, 2024
- Generic4,024 claims88%
- Brand-name and other523 claims12%
Dr. Gentemann'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. Gentemann's Part D claims, 2024
- Opioids1%66 of 4,547 claims
- Antibiotics2%75 of 4,547 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: 3,5122024: 3,91511%
Drugs named by CMS: 101 in 2024, 92 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. Catherine F. Gentemann offers telehealth to Medicare patients
Dr. Gentemann accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Gentemann as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 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. Catherine F. Gentemann received $634 in industry payments from 2016 to 2023
CMS Open Payments shows 34 general payments to Dr. Gentemann from 15 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $105.
General payments to Dr. Gentemann by program year, 2016 to 2023
Companies that paid Dr. Gentemann the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Catherine F. Gentemann graduated from Loyola University Chicago Stritch School of Medicine
Dr. Gentemann graduated from Loyola University Chicago Stritch School of Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Catherine F. Gentemann accepts plans from 14 insurance carriers
Dr. Gentemann is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Gentemann accepts, by number of carriers
- Medicare9
- PPO9
- HMO7
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Catherine F. Gentemann'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 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Catherine F. Gentemann
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. Catherine F. Gentemann's NPI number?
Dr. Catherine F. Gentemann's NPI number is 1215043526. It was assigned on August 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine F. Gentemann?
Dr. Catherine F. Gentemann is an internist in Huntington Beach, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Catherine F. Gentemann practice?
Dr. Gentemann practices at 17762 Beach Blvd, Huntington Beach, CA 92647. Dr. Gentemann's primary practice is Memorialcare Medical Foundation in Huntington Beach, California. Dmand AI also links Dr. Gentemann to 2 hospitals, 2 home health agencies and 1 group practice or clinic.
What is Dr. Catherine F. Gentemann's office phone number?
The practice phone on file for Dr. Gentemann is (877) 696-3622.
What is Dr. Catherine F. Gentemann's medical license number?
Dr. Gentemann holds California license G081721.
Which hospitals is Dr. Catherine F. Gentemann affiliated with?
Dr. Gentemann is affiliated with Hoag Hospital Newport Beach. Dmand AI links Dr. Gentemann to 2 more hospitals.
What medical group is Dr. Catherine F. Gentemann part of?
Dr. Gentemann is linked to MemorialCare Medical Group.
Does Dr. Catherine F. Gentemann accept Medicare?
Yes. CMS data shows Dr. Gentemann billed Medicare for 956 services in 2024, and Dr. Gentemann accepts Medicare assignment.
Does Dr. Catherine F. Gentemann offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Gentemann as offering telehealth services.
How many Medicare patients does Dr. Catherine F. Gentemann see?
CMS counts 251 Medicare patients who saw Dr. Gentemann in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
What services does Dr. Catherine F. Gentemann bill to Medicare?
In 2024, Dr. Gentemann's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G2211).
Where did Dr. Catherine F. Gentemann go to medical school?
Dr. Gentemann graduated from Loyola University Chicago Stritch School of Medicine in 1993.
What drugs does Dr. Catherine F. Gentemann prescribe most?
In 2024 Medicare Part D data, Dr. Gentemann's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Catherine F. Gentemann received payments from drug or device companies?
CMS Open Payments shows $634 in general payments to Dr. Gentemann from 15 companies from 2016 to 2023. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Catherine F. Gentemann been practicing?
Dr. Gentemann graduated from medical school in 1993, 33 years ago.
What insurance does Dr. Catherine F. Gentemann accept?
Dr. Gentemann is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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