Dr. Gary P. Korff, MD
- Medicare services, 2024
- 685
- Medicare patients, 2024
- 158
- Part D claims, 2024
- 5,580
- Clinical trials
- 4
- Hospital affiliations
- 1
- Practice address
- 2910 Jefferson St, Carlsbad, CA 92008
- Practice phone
- Call (909) 793-3311
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Optum Redlands Fern Cajon Primary and Specialty Care
Carlsbad, California
Find Dr. Korff'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. Gary P. Korff is a family medicine physician in Carlsbad, California
Dr. Korff practices at Optum Redlands Fern Cajon Primary and Specialty Care in Carlsbad, California.
Dr. Korff's NPI, 1063585495, was assigned on November 15, 2006. Dr. Korff graduated from UC San Diego School of Medicine in 1989. Dr. Korff's California license number on file is G69553.
- NPI
- 1063585495NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062608771
- NPI enumeration date
- November 15, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 793-3311
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary P. Korff practices at Optum Redlands Fern Cajon Primary and Specialty Care in Carlsbad, California
Dr. Korff's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care, at 2910 Jefferson St, Carlsbad, CA 92008 in San Diego County. The practice phone is (909) 793-3311.
- Optum Redlands Fern Cajon Primary and Specialty Care2910 Jefferson St, Carlsbad, CA 92008 · San Diego CountyPhone(909) 793-3311
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gary P. Korff is affiliated with 5 sites of care and 3 medical groups
Dr. Korff's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care in Carlsbad, California. Dr. Korff is also affiliated with Sharp Tri-City Medical Center. The medical group on file is OptumCare Medical Group. Dmand AI also links Dr. Korff to 3 more group practices and clinics and 2 medical groups, 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. Gary P. Korff's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Korff practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Optum Redlands Fern Cajon Primary and Specialty Care | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary P. Korff is one of 15,680 family medicine physicians in California
Family medicine is Dr. Korff's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Korff is board certified in family medicine by the American Board of Family Medicine. Dr. Korff has a license on file in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, acute skin infection, anxiety, atrial fibrillation and flutter, benign or precancerous skin growths, chronic anemia, chronic diabetes and chronic hypertension among the conditions Dr. Korff treats.
Family medicine physicians near Dr. Korff
Counts of family medicine physicians 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. Gary P. Korff billed Medicare for 685 services in 2024
CMS data shows 685 Medicare services from Dr. Korff across 12 procedure codes in 2024, for 158 Medicare patients. Medicare paid $34,453 for them. Every service was in an office.
Dr. Korff's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2542024: 30922%
- Surgery
- 2023: 2312024: 2205%
- Other services
- 2023: 452024: 92104%
- Tests and treatments
- 2023: 512024: 534%
- Lab and pathology
- 2023: 02024: 11
Dr. Korff compared with the California median for family medicine physicians, 2024
- Dr. Korff
- California median
- Medicare services
- 685vs 2462.8 times
- Medicare patients
- 158vs 11834% above
- Part D claims
- 4,932vs 8335.9 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Korff'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. Korff?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Korff and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary P. Korff treated 158 Medicare patients in 2024, average age 76
CMS counts 158 Medicare patients who saw Dr. Korff in 2024. The largest group is 65 to 74, with 78 patients. 71% of them have high blood pressure, and 61% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Korff's median patient age at 66, with 37% women.
Dr. Korff's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Korff's Medicare patients by sex, 2024
- Women6441%
- Men9459%
Chronic conditions among Dr. Korff's Medicare patients, 2024
- High blood pressure71%
- High cholesterol61%
- Arthritis34%
- Chronic kidney disease25%
- Diabetes22%
- Mood disorders22%
- Depression20%
- Ischemic heart disease19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Korff's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women37%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary P. Korff wrote 5,580 Medicare Part D claims in 2024
In 2024, Dr. Korff wrote 5,580 Medicare Part D claims for 578 patients. 85% of them were for generic drugs. CMS names the drug for 4,932 of them, across 108 drugs with 11 or more claims each, at $438,672 in total drug cost. In 2023, CMS named 4,774 claims across 111 drugs.
Dr. Korff's Part D claims by kind of drug, 2024
- Generic4,751 claims85%
- Brand-name773 claims14%
- Other56 claims1%
Dr. Korff'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. Korff's Part D claims, 2024
- Opioids3%176 of 5,580 claims
- Antibiotics2%96 of 5,580 claims
- Antipsychotics, patients 65 and over1%39 of 5,580 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: 4,7742024: 4,9323%
Drugs named by CMS: 108 in 2024, 111 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. Gary P. Korff ranks in the 71st percentile for removal of skin lesions in Medicare
Dr. Korff accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Korff as offering telehealth. CMS counts 48 procedures of removal of skin lesions by Dr. Korff, more than 71% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Korff ranks in Medicare procedure volume
- Removal of skin lesions
- 71st percentile48 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 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. Gary P. Korff has worked on 4 clinical trials
Dmand AI links Dr. Korff to 4 clinical trials, 2 of them phase 3 studies. Conditions studied include Constipation, Osteoarthritis, Knee and Rectal Diseases. Bausch Health Americas, Inc. sponsors the most, 2. Open Payments lists research payments to Dr. Korff that name 1 trial.
Conditions in Dr. Korff's trials
- Constipation
- Osteoarthritis, Knee
- Rectal Diseases
- Bronchiolitis Obliterans Syndrome
- Colorectal Neoplasms
Investigators on the most trials with Dr. Korff
- Jay L. Adler, MD2 shared trials
- Humberto I. Aguilar, MD2 shared trials
- James L. Andersen, MD2 shared trials
Recent clinical trials with Dr. Korff
Open-label Extension (OLE) Study of Plecanatide for Chronic Idiopathic Constipation (CIC) (opens in a new tab)
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gary P. Korff received $2,714 in industry payments from 2016 to 2021
CMS Open Payments shows 164 general payments to Dr. Korff from 33 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 97% of the total. Pfizer Inc. paid the most, $456. It also lists 9 research payments totaling $973 in 2016, naming 1 clinical trial.
General payments to Dr. Korff by program year, 2016 to 2021
General payments to Dr. Korff by kind, 2016 to 2021
- Food and beverage$2,62297%
- Education$923%
Companies that paid Dr. Korff the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary P. Korff graduated from UC San Diego School of Medicine
Dr. Korff graduated from UC San Diego School of Medicine in 1989.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Gary P. Korff accepts plans from 16 insurance carriers
Dr. Korff is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- Humana
- +8 more carriersWith a free account
Plan types Dr. Korff accepts, by number of carriers
- PPO11
- Medicare9
- HMO6
- POS6
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary P. Korff'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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Gary P. Korff
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. Gary P. Korff's NPI number?
Dr. Gary P. Korff's NPI number is 1063585495. It was assigned on November 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary P. Korff?
Dr. Gary P. Korff is a family medicine physician in Carlsbad, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gary P. Korff practice?
Dr. Korff practices at 2910 Jefferson St, Carlsbad, CA 92008. Dr. Korff's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care in Carlsbad, California. Dmand AI also links Dr. Korff to 3 group practices and clinics and 2 medical groups.
What is Dr. Gary P. Korff's office phone number?
The practice phone on file for Dr. Korff is (909) 793-3311.
What is Dr. Gary P. Korff's medical license number?
Dr. Korff's California license number on file is G69553.
Which hospitals is Dr. Gary P. Korff affiliated with?
Dr. Korff is affiliated with Sharp Tri-City Medical Center.
What medical group is Dr. Gary P. Korff part of?
Dr. Korff is linked to OptumCare Medical Group. Dmand AI links Dr. Korff to 2 more medical groups.
Does Dr. Gary P. Korff accept Medicare?
Yes. CMS data shows Dr. Korff billed Medicare for 685 services in 2024, and Dr. Korff accepts Medicare assignment.
Does Dr. Gary P. Korff offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Korff as offering telehealth services.
How many Medicare patients does Dr. Gary P. Korff see?
CMS counts 158 Medicare patients who saw Dr. Korff in 2024, with an average age of 76.
Show 8 more questionsShow fewer questions
Is Dr. Gary P. Korff board certified?
Yes. Dr. Korff is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Gary P. Korff bill to Medicare?
In 2024, Dr. Korff's most billed Medicare services were office visit, established patient (99214), surgery: skin and soft tissue (17003) and surgery: heart and blood vessels (36415).
Where did Dr. Gary P. Korff go to medical school?
Dr. Korff graduated from UC San Diego School of Medicine in 1989.
What drugs does Dr. Gary P. Korff prescribe most?
In 2024 Medicare Part D data, Dr. Korff's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl ER.
Has Dr. Gary P. Korff received payments from drug or device companies?
CMS Open Payments shows $2,714 in general payments to Dr. Korff from 33 companies from 2016 to 2021. The largest total came from Pfizer Inc.
How long has Dr. Gary P. Korff been practicing?
Dr. Korff graduated from medical school in 1989, 37 years ago.
Does Dr. Gary P. Korff do research?
Dr. Korff has worked on 4 clinical trials.
What insurance does Dr. Gary P. Korff accept?
Dr. Korff is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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