Am J Ophthalmol
CataractCataract ExtractionLens Implantation, Intraocular
Dr. Matthew C. Carnahan, MD
NPI1093893760PAC ID2961681630
- Part D claims, 2024
- 2,618
- Publications
- 7
- Hospital affiliations
- 1
- Industry payments
- $486
- Medical groups
- 2
- Practice address
- 9455 Clairemont Mesa Blvd, San Diego, CA 92123
- Practice phone
- Call (619) 528-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente San Diego Medical Center
San Diego, California
Find Dr. Carnahan'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. Matthew C. Carnahan is an ophthalmologist in San Diego, California
Dr. Carnahan practices at Kaiser Permanente San Diego Medical Center in San Diego, California.
Dr. Carnahan's NPI, 1093893760, was assigned on November 1, 2006. Dr. Carnahan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1998. Dr. Carnahan holds California license A79822.
NPI and contact details
- NPI
- 1093893760NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961681630
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (619) 528-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew C. Carnahan practices at Kaiser Permanente San Diego Medical Center in San Diego, California
Dr. Carnahan's primary practice is Kaiser Permanente San Diego Medical Center, at 9455 Clairemont Mesa Blvd, San Diego, CA 92123 in San Diego County. The practice phone is (619) 528-5000.
- Kaiser Permanente San Diego Medical Center9455 Clairemont Mesa Blvd, San Diego, CA 92123 · San Diego CountyPhone(619) 528-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Matthew C. Carnahan is affiliated with 2 sites of care and 2 medical groups
Dr. Carnahan's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California. Dr. Carnahan is also affiliated with Roseville Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Carnahan to 1 more medical group, named with a free account.
Kaiser Permanente San Diego Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew C. Carnahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Carnahan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente San Diego Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Matthew C. Carnahan is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Carnahan's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Carnahan is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Carnahan's licenses on file in 3 states: California, Wisconsin and Illinois.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Wisconsin license
- Illinois license
Clinical focus
Dmand AI lists dry eye, secondary membranaous cataract surgery and vision problems among the conditions Dr. Carnahan treats.
Ophthalmologists near Dr. Carnahan
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. Matthew C. Carnahan's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Carnahan's median patient age at 68, with 59% women.
Dr. Carnahan'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
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. Matthew C. Carnahan wrote 2,618 Medicare Part D claims in 2024
In 2024, Dr. Carnahan wrote 2,618 Medicare Part D claims for 591 patients. 85% of them were for generic drugs. CMS names the drug for 2,544 of them, across 20 drugs with 11 or more claims each, at $103,779 in total drug cost. In 2023, CMS named 2,401 claims across 18 drugs.
Part D claims, 20242,618
Drugs named by CMS20
Total drug cost$103,779
Part D patients591
Dr. Carnahan's Part D claims by kind of drug, 2024
- Generic2,235 claims85%
- Brand-name383 claims15%
Dr. Carnahan'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. Carnahan's Part D claims, 2024
- Antibiotics1%15 of 2,618 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: 2,4012024: 2,5446%
Drugs named by CMS: 20 in 2024, 18 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. Matthew C. Carnahan offers telehealth to Medicare patients
Dr. Carnahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Carnahan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Cataract surgery: 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. Matthew C. Carnahan has 7 publications on record
Dmand AI links 7 papers to Dr. Carnahan, published from 2014 to 2021. 2021 was the busiest year, with 3. The most frequent topics are Cataract and Phacoemulsification. Dr. Carnahan's most frequent co-authors are William J. Chang, MD and Payam P. Sazegar, MD.
Papers7
Years published2014 to 2021
Topics Dr. Carnahan writes about most
- Cataract
- Phacoemulsification
Dr. Carnahan's most frequent co-authors
Recent publications by Dr. Carnahan
Anti-Inflammatory AgentsAntiviral AgentsHerpes Zoster Ophthalmicus
Ophthalmology
Anterior ChamberIntraocular PressureOcular Hypertension
See who Dr. Carnahan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Carnahan 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. Matthew C. Carnahan received $486 in industry payments from 2017 to 2025
CMS Open Payments shows 10 general payments to Dr. Carnahan from 2 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $343.
General payments to Dr. Carnahan by program year, 2017 to 2025
Companies that paid Dr. Carnahan the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Matthew C. Carnahan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Carnahan, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Carnahan
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Matthew C. Carnahan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Carnahan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1998.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Matthew C. Carnahan accepts plans from 2 insurance carriers
Dr. Carnahan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Carnahan accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Matthew C. Carnahan'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 DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Matthew C. Carnahan
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. Matthew C. Carnahan's NPI number?
Dr. Matthew C. Carnahan's NPI number is 1093893760. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew C. Carnahan?
Dr. Matthew C. Carnahan is an ophthalmologist in San Diego, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Matthew C. Carnahan practice?
Dr. Carnahan practices at 9455 Clairemont Mesa Blvd, San Diego, CA 92123. Dr. Carnahan's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California. Dmand AI also links Dr. Carnahan to 1 medical group.
What is Dr. Matthew C. Carnahan's office phone number?
The practice phone on file for Dr. Carnahan is (619) 528-5000.
What is Dr. Matthew C. Carnahan's medical license number?
Dr. Carnahan holds California license A79822, one of the licenses on file in 3 states.
Which states has Dr. Matthew C. Carnahan been licensed in?
Dmand AI has state licenses on file for Dr. Carnahan in California (2002 to 2026), Wisconsin (1999 to 2007) and Illinois (1998 to 1999).
Which hospitals is Dr. Matthew C. Carnahan affiliated with?
Dr. Carnahan is affiliated with Roseville Medical Center.
What medical group is Dr. Matthew C. Carnahan part of?
Dr. Carnahan is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Carnahan to 1 more medical group.
Does Dr. Matthew C. Carnahan accept Medicare?
Yes. CMS lists Dr. Carnahan as accepting Medicare assignment.
Does Dr. Matthew C. Carnahan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Carnahan as offering telehealth services.
Show 8 more questionsShow fewer questions
Is Dr. Matthew C. Carnahan board certified?
Yes. Dr. Carnahan is board certified in ophthalmology by the American Board of Ophthalmology.
Where did Dr. Matthew C. Carnahan go to medical school?
Dr. Carnahan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1998.
What drugs does Dr. Matthew C. Carnahan prescribe most?
In 2024 Medicare Part D data, Dr. Carnahan's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Timolol Maleate.
Has Dr. Matthew C. Carnahan received payments from drug or device companies?
CMS Open Payments shows $486 in general payments to Dr. Carnahan from 2 companies from 2017 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Matthew C. Carnahan been practicing?
Dr. Carnahan graduated from medical school in 1998, 28 years ago.
Does Dr. Matthew C. Carnahan do research?
Dmand AI links 7 publications to Dr. Carnahan, published from 2014 to 2021.
Who does Dr. Matthew C. Carnahan publish with?
Dr. Carnahan's most frequent co-authors are William J. Chang, MD (1 shared paper) and Payam P. Sazegar, MD (1 shared paper).
What insurance does Dr. Matthew C. Carnahan accept?
Dr. Carnahan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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