Dr. John C. Affeldt, MD
- Medicare services, 2024
- 857
- Medicare patients, 2026
- 403
- Part D claims, 2026
- 2,515
- Publications
- 3
- Clinical trials
- 2
- Practice address
- 11370 Anderson St, Loma Linda, CA 92354
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD
Acute Care Hospital outpatient department · Loma Linda, California
Find Dr. Affeldt'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. John C. Affeldt is an ophthalmologist in Loma Linda, California
Dr. Affeldt practices at Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD in Loma Linda, California.
Dr. Affeldt's NPI, 1275523375, was assigned on October 28, 2005. Dr. Affeldt graduated from Keck School of Medicine of USC in 1977. Dr. Affeldt holds California license G38490.
- NPI
- 1275523375NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466472477
- NPI enumeration date
- October 28, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John C. Affeldt practices at Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD in Loma Linda, California
Dr. Affeldt's primary practice is Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD, at 11370 Anderson St, Loma Linda, CA 92354.
- Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD11370 Anderson St, Loma Linda, CA 92354
Source: Dmand AI Affiliation Data
Dr. John C. Affeldt is affiliated with 4 sites of care and 1 medical group
Dr. Affeldt's primary practice is Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD in Loma Linda, California. Dr. Affeldt is also affiliated with Riverside University Health System - Medical Center. The medical group on file is Loma Linda University Faculty Medical Group (LLUFMG). Dmand AI also links Dr. Affeldt to 1 more group practice or clinic and 1 hospital outpatient department, each named with a free account. Dr. Affeldt's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John C. Affeldt's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Affeldt practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John C. Affeldt is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Affeldt's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Affeldt is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Affeldt is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Clinical focus
Dmand AI lists cataract, conjunctivitis, dry eye, eye infection or inflammation, eyelid inflammation, glaucoma, glaucoma surgery and hereditary corneal conditions among the conditions Dr. Affeldt treats.
Ophthalmologists near Dr. Affeldt
Counts of ophthalmologists 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. John C. Affeldt billed Medicare for 857 services in 2024
CMS data shows 857 Medicare services from Dr. Affeldt across 6 procedure codes in 2024, for 403 Medicare patients. Medicare paid $49,512 for them. Every service was in an office.
Dr. Affeldt's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7002024: 7507%
- Surgery
- 2023: 572024: 10788%
Dr. Affeldt compared with the California median for ophthalmologists, 2024
- Dr. Affeldt
- California median
- Medicare services
- 857vs 1,07921% below
- Medicare patients
- 403vs 421Close to median
- Part D claims
- 2,441vs 6183.9 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Affeldt'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. Affeldt?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Affeldt and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Affeldt treated 403 Medicare patients in 2026, average age 74
CMS counts 403 Medicare patients who saw Dr. Affeldt in 2026. The largest group is 65 to 74, with 153 patients. 75% of them have high blood pressure, and 69% have high cholesterol. 39% are also on Medicaid. Their average risk score is 1.58, 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. Affeldt's median patient age at 68, with 66% women.
Dr. Affeldt's Medicare patients by age, 2026
Dr. Affeldt's Medicare patients by sex, 2026
- Women29272%
- Men11128%
Chronic conditions among Dr. Affeldt's Medicare patients, 2026
- High blood pressure75%
- High cholesterol69%
- Arthritis59%
- Diabetes40%
- Chronic kidney disease29%
- Osteoporosis25%
- Ischemic heart disease24%
- Anxiety22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Affeldt's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women66%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. John C. Affeldt wrote 2,515 Medicare Part D claims in 2026
In 2026, Dr. Affeldt wrote 2,515 Medicare Part D claims for 559 patients. 36% of them were for generic drugs. CMS names the drug for 2,441 of them, across 30 drugs with 11 or more claims each, at $4,824,618 in total drug cost. In 2023, CMS named 1,936 claims across 25 drugs.
Dr. Affeldt's Part D claims by kind of drug, 2026
- Generic907 claims36%
- Brand-name1,608 claims64%
Dr. Affeldt'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. Affeldt's Part D claims, 2026
- Antibiotics4%113 of 2,515 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: 1,9362024: 2,44126%
Drugs named by CMS: 30 in 2024, 25 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), 2026 data
Dr. John C. Affeldt scored 89 out of 100 in Medicare's MIPS program for 2026
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Affeldt for performance year 2026, reported as part of a group. Dr. Affeldt accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Affeldt's MIPS scores, performance year 2026
- 89of 100Final score
- 72.1of 100Quality
- 80of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2026 data; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John C. Affeldt has 3 publications on record
Dmand AI links 3 papers to Dr. Affeldt in 2022. Dr. Affeldt's most frequent co-authors are John G. Clarkson, MD, Harry W. Flynn, MD and Richard K. Forster, MD.
Dr. Affeldt's most frequent co-authors
- John G. Clarkson, MD1 shared paper
- Harry W. Flynn, MD1 shared paper
- Richard K. Forster, MD1 shared paper
Recent publications by Dr. Affeldt
See who Dr. Affeldt researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Affeldt works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John C. Affeldt has worked on 2 clinical trials
Dmand AI links Dr. Affeldt to 2 clinical trials. Conditions studied include Herpes Zoster Ophthalmicus and Chickenpox.
Clinical trials with Dr. Affeldt by phase
- NonePhase 1: no trials
- 1Phase 2: 1 trial
- NonePhase 3: no trials
- 1Phase 4: 1 trial
Conditions in Dr. Affeldt's trials
- Herpes Zoster Ophthalmicus
- Chickenpox
Investigators on the most trials with Dr. Affeldt
Recent clinical trials with Dr. Affeldt
Zoster Eye Disease Study (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. John C. Affeldt received $1,409,495 in industry payments from 2016 to 2025
CMS Open Payments shows 1,938 general payments to Dr. Affeldt from 21 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 51% of the total. Mallinckrodt Hospital Products Inc. paid the most, $528,165.
General payments to Dr. Affeldt by program year, 2016 to 2025
General payments to Dr. Affeldt by kind, 2016 to 2025
- Speaker and faculty fees$698,32551%
- Compensation for serving as faculty or as a speaker for a medical education program$225,41216%
- Travel and lodging$180,21213%
- Education speaker fees$129,5509%
- Other$134,20310%
Companies that paid Dr. Affeldt 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. John C. Affeldt graduated from Keck School of Medicine of USC
Dr. Affeldt graduated from Keck School of Medicine of USC in 1977.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. John C. Affeldt accepts plans from 16 insurance carriers
Dr. Affeldt is in network with 16 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Humana
- +8 more carriersWith a free account
Plan types Dr. Affeldt accepts, by number of carriers
- Medicare11
- PPO11
- HMO7
- POS6
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. John C. Affeldt'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)Doctors and Clinicians Utilization Data (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. John C. Affeldt
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. John C. Affeldt's NPI number?
Dr. John C. Affeldt's NPI number is 1275523375. It was assigned on October 28, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Affeldt?
Dr. John C. Affeldt is an ophthalmologist in Loma Linda, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John C. Affeldt practice?
Dr. Affeldt practices at 11370 Anderson St, Loma Linda, CA 92354. Dr. Affeldt's primary practice is Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD in Loma Linda, California. Dmand AI also links Dr. Affeldt to 1 group practice or clinic and 1 hospital outpatient department, and a free account names each one.
What is Dr. John C. Affeldt's email address?
Dmand AI checks professional and personal email addresses for Dr. Affeldt through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. John C. Affeldt's medical license number?
Dr. Affeldt holds California license G38490.
Which hospitals is Dr. John C. Affeldt affiliated with?
Dr. Affeldt is affiliated with Riverside University Health System - Medical Center.
What medical group is Dr. John C. Affeldt part of?
Dr. Affeldt is linked to Loma Linda University Faculty Medical Group (LLUFMG).
Who employs Dr. John C. Affeldt?
Dmand AI has Dr. Affeldt's employer on file: a hospital. The organization's name is available with a free Dmand AI account.
Who does Dr. John C. Affeldt practice with?
Dmand AI links 1,932 HCPs to Dr. Affeldt's primary medical group, 28 of them ophthalmologists. A free account lists them, with verified contacts.
Does Dr. John C. Affeldt accept Medicare?
Yes. CMS data shows Dr. Affeldt billed Medicare for 857 services in 2024, and Dr. Affeldt accepts Medicare assignment.
Show 12 more questionsShow fewer questions
What is Dr. John C. Affeldt's MIPS score?
Dr. Affeldt's MIPS final score for performance year 2026 is 89 out of 100, reported as part of a group.
How many Medicare patients does Dr. John C. Affeldt see?
CMS counts 403 Medicare patients who saw Dr. Affeldt in 2026, with an average age of 74.
Is Dr. John C. Affeldt board certified?
Yes. Dr. Affeldt is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. John C. Affeldt bill to Medicare?
In 2024, Dr. Affeldt's most billed Medicare services were office visit, established patient (99212), office visit, established patient (99213) and surgery: eye (68761).
Where did Dr. John C. Affeldt go to medical school?
Dr. Affeldt graduated from Keck School of Medicine of USC in 1977.
What drugs does Dr. John C. Affeldt prescribe most?
In 2024 Medicare Part D data, Dr. Affeldt's most prescribed drugs by claims were Loteprednol Etabonate, Fluorometholone and Restasis.
Has Dr. John C. Affeldt received payments from drug or device companies?
CMS Open Payments shows $1,409,495 in general payments to Dr. Affeldt from 21 companies from 2016 to 2025. The largest total came from Mallinckrodt Hospital Products Inc.
How long has Dr. John C. Affeldt been practicing?
Dr. Affeldt graduated from medical school in 1977, 49 years ago.
Does Dr. John C. Affeldt do research?
Dmand AI links 3 publications to Dr. Affeldt. Dr. Affeldt has worked on 2 clinical trials.
Who does Dr. John C. Affeldt publish with?
Dr. Affeldt's most frequent co-authors are John G. Clarkson, MD (1 shared paper), Harry W. Flynn, MD (1 shared paper) and Richard K. Forster, MD (1 shared paper).
What EHR does Dr. John C. Affeldt's practice use?
Dmand AI tracks the EHR system at Loma Linda University Medical Cente - Center for Restorative Neurology - HOPD and at 3 more affiliated sites. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. John C. Affeldt accept?
Dr. Affeldt is in network with 16 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit. The full carrier list is available with a free Dmand AI account.
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