Ophthalmology
AsianDiagnostic Techniques, OphthalmologicalDisease Progression
Dr. Douglas Katsumi Sakamoto, MD
NPI1871566554PAC ID5991774127
- Medicare services, 2024
- 5,324
- Medicare patients, 2024
- 1,768
- Part D claims, 2024
- 3,836
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 3330 Lomita Blvd, Torrance, CA 90509
- Practice phone
- Call (310) 325-9110
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Douglas Katsumi Sakamoto is an ophthalmologist in Torrance, California
Dr. Sakamoto practices at Torrance Memorial Medical Center in Torrance, California, part of Cedars-Sinai Health System.
Dr. Sakamoto's NPI, 1871566554, was assigned on February 10, 2006. Dr. Sakamoto graduated from Keck School of Medicine of USC in 2000. Dr. Sakamoto holds California license A87145.
NPI and contact details
- NPI
- 1871566554NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991774127
- NPI enumeration date
- February 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 325-9110
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas Katsumi Sakamoto practices at Torrance Memorial Medical Center in Torrance, California
Dr. Sakamoto's primary practice is Torrance Memorial Medical Center, at 3330 Lomita Blvd, Torrance, CA 90509 in Los Angeles County. The practice phone is (310) 325-9110.
- Torrance Memorial Medical Center3330 Lomita Blvd, Torrance, CA 90509 · Los Angeles CountyPhone(310) 325-9110
Source: Dmand AI Affiliation Data
Dr. Douglas Katsumi Sakamoto is affiliated with 1 site of care
Dr. Sakamoto's primary practice is Torrance Memorial Medical Center in Torrance, California, part of Cedars-Sinai Health System.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Douglas Katsumi Sakamoto's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sakamoto practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Torrance Memorial Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas Katsumi Sakamoto is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Sakamoto's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Sakamoto is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Sakamoto's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, conjunctivitis, dry eye, eyelid inflammation, glaucoma and glaucoma surgery among the conditions Dr. Sakamoto treats.
Ophthalmologists near Dr. Sakamoto
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. Douglas Katsumi Sakamoto billed Medicare for 5,324 services in 2024
CMS data shows 5,324 Medicare services from Dr. Sakamoto across 15 procedure codes in 2024, for 1,768 Medicare patients. Medicare paid $430,424 for them.
Medicare services, 20245,324
Medicare patients1,768
Paid by Medicare$430,424
Procedure codes15
Dr. Sakamoto's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3,2602024: 3,65212%
- Office and hospital visits
- 2023: 1,4112024: 1,4462%
- Surgery
- 2023: 2522024: 22610%
- Imaging
- 2023: 362024: 0100%
Where Dr. Sakamoto's Medicare services took place, 2024
- In an office5,15597%
- In a facility1693%
Dr. Sakamoto compared with the California median for ophthalmologists, 2024
- Dr. Sakamoto
- California median
- Medicare services
- 5,324vs 1,0794.9 times
- Medicare patients
- 1,768vs 4214.2 times
- Part D claims
- 3,703vs 6186.0 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Sakamoto'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. Sakamoto?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Sakamoto and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas Katsumi Sakamoto treated 1,768 Medicare patients in 2024, average age 78
CMS counts 1,768 Medicare patients who saw Dr. Sakamoto in 2024. The largest group is 75 to 84, with 753 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sakamoto's median patient age at 67, with 57% women.
Medicare patients, 20241,768
Average age78
Average risk score1.03
Also on Medicaid7%
Dr. Sakamoto's Medicare patients by age, 2024
Dr. Sakamoto's Medicare patients by sex, 2024
- Women1,05860%
- Men71040%
Chronic conditions among Dr. Sakamoto's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis37%
- Diabetes31%
- Chronic kidney disease23%
- Osteoporosis23%
- Ischemic heart disease21%
- Cancer16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sakamoto's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women57%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas Katsumi Sakamoto wrote 3,836 Medicare Part D claims in 2024
In 2024, Dr. Sakamoto wrote 3,836 Medicare Part D claims for 769 patients. 60% of them were for generic drugs. CMS names the drug for 3,703 of them, across 26 drugs with 11 or more claims each, at $427,070 in total drug cost. In 2023, CMS named 3,857 claims across 32 drugs.
Part D claims, 20243,836
Drugs named by CMS26
Total drug cost$427,070
Part D patients769
Dr. Sakamoto's Part D claims by kind of drug, 2024
- Generic2,296 claims60%
- Brand-name1,540 claims40%
Dr. Sakamoto'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. Sakamoto's Part D claims, 2024
- Antibiotics0%11 of 3,836 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: 3,8572024: 3,7034%
Drugs named by CMS: 26 in 2024, 32 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. Douglas Katsumi Sakamoto ranks in the 87th percentile for cataract surgery in Medicare
Dr. Sakamoto accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 252 procedures of cataract surgery by Dr. Sakamoto, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Sakamoto ranks in Medicare procedure volume
- Cataract surgery
- 87th percentile252 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Douglas Katsumi Sakamoto has 2 publications on record
Dmand AI links 2 papers to Dr. Sakamoto in 2006. Dr. Sakamoto's most frequent co-authors are Michael Baroody, MD, Amish Bipin Doshi, MD and Kuldev Singh, MD.
Papers2
Dr. Sakamoto's most frequent co-authors
Recent publications by Dr. Sakamoto
Ann Plast Surg
BlepharoptosisEyelidsMinimally Invasive Surgical Procedures
See who Dr. Sakamoto researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sakamoto 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. Douglas Katsumi Sakamoto received $1,788 in industry payments from 2016 to 2025
CMS Open Payments shows 66 general payments to Dr. Sakamoto from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 63% of the total. Alcon Laboratories Inc paid the most, $887.
General payments to Dr. Sakamoto by program year, 2016 to 2025
General payments to Dr. Sakamoto by kind, 2016 to 2025
$1.8Kin total
- Food and beverage$1,13263%
- Travel and lodging$53930%
- Education$804%
- Gifts$372%
Companies that paid Dr. Sakamoto 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. Douglas Katsumi Sakamoto has 1 award and honors on record
Dmand AI lists 1 award for Dr. Sakamoto.
Awards and honors for Dr. Sakamoto
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Douglas Katsumi Sakamoto graduated from Keck School of Medicine of USC
Dr. Sakamoto graduated from Keck School of Medicine of USC in 2000. Dr. Sakamoto is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Douglas Katsumi Sakamoto accepts plans from 14 insurance carriers
Dr. Sakamoto is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Sakamoto accepts, by number of carriers
- PPO10
- Medicare8
- HMO6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Douglas Katsumi Sakamoto'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 DataDmand AI Org Hierarchy 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) |
| 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. Douglas Katsumi Sakamoto
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. Douglas Katsumi Sakamoto's NPI number?
Dr. Douglas Katsumi Sakamoto's NPI number is 1871566554. It was assigned on February 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas Katsumi Sakamoto?
Dr. Douglas Katsumi Sakamoto is an ophthalmologist in Torrance, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Douglas Katsumi Sakamoto practice?
Dr. Sakamoto practices at 3330 Lomita Blvd, Torrance, CA 90509. Dr. Sakamoto's primary practice is Torrance Memorial Medical Center in Torrance, California, part of Cedars-Sinai Health System.
What is Dr. Douglas Katsumi Sakamoto's office phone number?
The practice phone on file for Dr. Sakamoto is (310) 325-9110.
What is Dr. Douglas Katsumi Sakamoto's medical license number?
Dr. Sakamoto holds California license A87145, one of the licenses on file in 2 states.
Which states has Dr. Douglas Katsumi Sakamoto been licensed in?
Dmand AI has state licenses on file for Dr. Sakamoto in California (2004 to 2027) and Illinois (2000 to 2001).
Which hospitals is Dr. Douglas Katsumi Sakamoto affiliated with?
Dr. Sakamoto practices at Torrance Memorial Medical Center in Torrance, California.
Does Dr. Douglas Katsumi Sakamoto accept Medicare?
Yes. CMS data shows Dr. Sakamoto billed Medicare for 5,324 services in 2024, and Dr. Sakamoto accepts Medicare assignment.
How many Medicare patients does Dr. Douglas Katsumi Sakamoto see?
CMS counts 1,768 Medicare patients who saw Dr. Sakamoto in 2024, with an average age of 78.
Is Dr. Douglas Katsumi Sakamoto board certified?
Yes. Dr. Sakamoto is board certified in ophthalmology by the American Board of Ophthalmology.
Show 8 more questionsShow fewer questions
What services does Dr. Douglas Katsumi Sakamoto bill to Medicare?
In 2024, Dr. Sakamoto's most billed Medicare services were office visit, established patient (99213), eye exam or test (92014) and eye exam or test (92133).
Where did Dr. Douglas Katsumi Sakamoto go to medical school?
Dr. Sakamoto graduated from Keck School of Medicine of USC in 2000.
What drugs does Dr. Douglas Katsumi Sakamoto prescribe most?
In 2024 Medicare Part D data, Dr. Sakamoto's most prescribed drugs by claims were Latanoprost, Timolol Maleate and Dorzolamide-Timolol.
Has Dr. Douglas Katsumi Sakamoto received payments from drug or device companies?
CMS Open Payments shows $1,788 in general payments to Dr. Sakamoto from 15 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Douglas Katsumi Sakamoto been practicing?
Dr. Sakamoto graduated from medical school in 2000, 26 years ago.
Does Dr. Douglas Katsumi Sakamoto do research?
Dmand AI links 2 publications to Dr. Sakamoto.
Who does Dr. Douglas Katsumi Sakamoto publish with?
Dr. Sakamoto's most frequent co-authors are Michael Baroody, MD (1 shared paper), Amish Bipin Doshi, MD (1 shared paper) and Kuldev Singh, MD (1 shared paper).
What insurance does Dr. Douglas Katsumi Sakamoto accept?
Dr. Sakamoto is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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