Dr. Matthew Sinclair Kaplan, MD
- Medicare services, 2024
- 395
- Medicare patients, 2024
- 329
- Part D claims, 2024
- 151
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 455 S Main St, Orange, CA 92868
- Practice phone
- Call (714) 509-8451
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Childrens Hospital of Orange County
Orange, California
Find Dr. Kaplan's professional email, personal email and mobile number
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Dr. Matthew Sinclair Kaplan is an emergency medicine physician in Orange, California
Dr. Kaplan practices at Childrens Hospital of Orange County in Orange, California.
Dr. Kaplan's NPI, 1518991322, was assigned on July 10, 2006. Dr. Kaplan graduated from Tulane School of Medicine in 1995. Dr. Kaplan holds California license A61677.
- NPI
- 1518991322NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476581521
- NPI enumeration date
- July 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 509-8451
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew Sinclair Kaplan practices at Childrens Hospital of Orange County in Orange, California
Dr. Kaplan's primary practice is Childrens Hospital of Orange County, at 455 S Main St, Orange, CA 92868 in Orange County. The practice phone is (714) 509-8451.
- Childrens Hospital of Orange County455 S Main St, Orange, CA 92868 · Orange CountyPhone(714) 509-8451
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Matthew Sinclair Kaplan is affiliated with 2 sites of care and 2 medical groups
Dr. Kaplan's primary practice is Childrens Hospital of Orange County in Orange, California. Dr. Kaplan is also affiliated with Providence Mission Hospital. The medical group on file is Emergency Medicine Physicians. Dmand AI also links Dr. Kaplan to 1 more medical group, named with a free account.
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 Sinclair Kaplan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kaplan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Childrens Hospital of Orange County | 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 Sinclair Kaplan is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Kaplan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Kaplan is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Kaplan is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Kaplan
Counts of emergency 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. Matthew Sinclair Kaplan billed Medicare for 395 services in 2024
CMS data shows 395 Medicare services from Dr. Kaplan across 4 procedure codes in 2024, for 329 Medicare patients. Medicare paid $47,149 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kaplan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2012024: 32763%
- Tests and treatments
- 2023: 252024: 68172%
Dr. Kaplan compared with the California median for emergency medicine physicians, 2024
- Dr. Kaplan
- California median
- Medicare services
- 395vs 26549% above
- Medicare patients
- 329vs 24335% above
- Part D claims
- 99vs 6260% above
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Kaplan'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. Kaplan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kaplan and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Matthew Sinclair Kaplan treated 329 Medicare patients in 2024, average age 80
CMS counts 329 Medicare patients who saw Dr. Kaplan in 2024. The largest group is 75 to 84, with 142 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.81, 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. Kaplan's median patient age at 49, with 53% women.
Dr. Kaplan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kaplan's Medicare patients by sex, 2024
- Women17754%
- Men15246%
Chronic conditions among Dr. Kaplan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Atrial fibrillation35%
- Ischemic heart disease35%
- Diabetes33%
- Mood disorders33%
- Chronic kidney disease32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kaplan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Matthew Sinclair Kaplan wrote 151 Medicare Part D claims in 2024
In 2024, Dr. Kaplan wrote 151 Medicare Part D claims for 120 patients. 95% of them were for generic drugs. CMS names the drug for 99 of them, across 6 drugs with 11 or more claims each, at $762 in total drug cost. In 2023, CMS named 42 claims across 3 drugs.
Dr. Kaplan's Part D claims by kind of drug, 2024
- Generic143 claims95%
- Brand-name and other8 claims5%
Dr. Kaplan'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. Kaplan's Part D claims, 2024
- Opioids10%15 of 151 claims
- Antibiotics44%67 of 151 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: 422024: 99136%
Drugs named by CMS: 6 in 2024, 3 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
How Dr. Matthew Sinclair Kaplan takes part in Medicare
Dr. Kaplan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Matthew Sinclair Kaplan has 2 publications on record
Dmand AI links 2 papers to Dr. Kaplan, published from 2022 to 2023. Dr. Kaplan's most frequent co-authors are Margaret A. Brooks, MD, Meeryo Christa Choe, MD and James R. Clugston, MD.
Dr. Kaplan's most frequent co-authors
- Margaret A. Brooks, MD1 shared paper
- Meeryo Christa Choe, MD1 shared paper
- James R. Clugston, MD1 shared paper
Recent publications by Dr. Kaplan
J Head Trauma Rehabil
See who Dr. Kaplan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kaplan works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Matthew Sinclair Kaplan received $195,450 in industry payments from 2018 to 2023
CMS Open Payments shows 16 general payments to Dr. Kaplan from 8 drug and device companies from 2018 to 2023. Consulting fees make up the largest share, 99% of the total. Ceribell, Inc. paid the most, $194,210.
General payments to Dr. Kaplan by program year, 2018 to 2023
General payments to Dr. Kaplan by kind, 2018 to 2023
- Consulting fees$193,14299%
- Food and beverage$2,3081%
Companies that paid Dr. Kaplan the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Matthew Sinclair Kaplan graduated from Tulane School of Medicine
Dr. Kaplan graduated from Tulane School of Medicine in 1995.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Matthew Sinclair Kaplan accepts plans from 5 insurance carriers
Dr. Kaplan is in network with 5 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Kaplan accepts, by number of carriers
- Medicare5
- PPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Matthew Sinclair Kaplan'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 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) |
| 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) |
| 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 Sinclair Kaplan
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 Sinclair Kaplan's NPI number?
Dr. Matthew Sinclair Kaplan's NPI number is 1518991322. It was assigned on July 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew Sinclair Kaplan?
Dr. Matthew Sinclair Kaplan is an emergency medicine physician in Orange, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Matthew Sinclair Kaplan practice?
Dr. Kaplan practices at 455 S Main St, Orange, CA 92868. Dr. Kaplan's primary practice is Childrens Hospital of Orange County in Orange, California. Dmand AI also links Dr. Kaplan to 1 medical group.
What is Dr. Matthew Sinclair Kaplan's office phone number?
The practice phone on file for Dr. Kaplan is (714) 509-8451.
What is Dr. Matthew Sinclair Kaplan's medical license number?
Dr. Kaplan holds California license A61677.
Which hospitals is Dr. Matthew Sinclair Kaplan affiliated with?
Dr. Kaplan is affiliated with Providence Mission Hospital.
What medical group is Dr. Matthew Sinclair Kaplan part of?
Dr. Kaplan is linked to Emergency Medicine Physicians. Dmand AI links Dr. Kaplan to 1 more medical group.
Does Dr. Matthew Sinclair Kaplan accept Medicare?
Yes. CMS data shows Dr. Kaplan billed Medicare for 395 services in 2024, and Dr. Kaplan accepts Medicare assignment.
How many Medicare patients does Dr. Matthew Sinclair Kaplan see?
CMS counts 329 Medicare patients who saw Dr. Kaplan in 2024, with an average age of 80.
Is Dr. Matthew Sinclair Kaplan board certified?
Yes. Dr. Kaplan is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Matthew Sinclair Kaplan bill to Medicare?
In 2024, Dr. Kaplan's most billed Medicare services were emergency department visit (99285), critical care (99291) and heart test or procedure (93010).
Where did Dr. Matthew Sinclair Kaplan go to medical school?
Dr. Kaplan graduated from Tulane School of Medicine in 1995.
What drugs does Dr. Matthew Sinclair Kaplan prescribe most?
In 2024 Medicare Part D data, Dr. Kaplan's most prescribed drugs by claims were Ondansetron ODT, Cefdinir and Cephalexin.
Has Dr. Matthew Sinclair Kaplan received payments from drug or device companies?
CMS Open Payments shows $195,450 in general payments to Dr. Kaplan from 8 companies from 2018 to 2023. The largest total came from Ceribell, Inc.
How long has Dr. Matthew Sinclair Kaplan been practicing?
Dr. Kaplan graduated from medical school in 1995, 31 years ago.
Does Dr. Matthew Sinclair Kaplan do research?
Dmand AI links 2 publications to Dr. Kaplan, published from 2022 to 2023.
Who does Dr. Matthew Sinclair Kaplan publish with?
Dr. Kaplan's most frequent co-authors are Margaret A. Brooks, MD (1 shared paper), Meeryo Christa Choe, MD (1 shared paper) and James R. Clugston, MD (1 shared paper).
What insurance does Dr. Matthew Sinclair Kaplan accept?
Dr. Kaplan is in network with 5 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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