Dr. Douglas Pendleton Roy, MD
- Medicare services, 2024
- 222
- Medicare patients, 2024
- 63
- Part D claims, 2024
- 293
- Industry payments
- $238
- Affiliated sites
- 1
- Practice address
- 395 S Topanga Canyon Blvd, Topanga, CA 90290-3143
- Practice phone
- Call (310) 455-2019
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Topanga Medical Clinic
Physician office · Topanga, California
Find Dr. Roy'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. Douglas Pendleton Roy is an internist in Topanga, California
Dr. Roy practices at Topanga Medical Clinic in Topanga, California.
Dr. Roy's NPI, 1417025180, was assigned on December 1, 2006. Dr. Roy graduated from University of Miami, Miller School of Medicine in 1975. Dr. Roy holds California license G-037170.
- NPI
- 1417025180NPI Registry (opens in a new tab)
- NPI enumeration date
- December 1, 2006
- NPI status
- Active
- Practice phone
- (310) 455-2019
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Douglas Pendleton Roy practices at Topanga Medical Clinic in Topanga, California
Dr. Roy's primary practice is Topanga Medical Clinic, at 395 S Topanga Canyon Blvd, Topanga, CA 90290-3143. The practice phone is (310) 455-2019.
- Topanga Medical Clinic395 S Topanga Canyon Blvd, Topanga, CA 90290-3143Phone(310) 455-2019
Source: Dmand AI Affiliation Data
Dr. Douglas Pendleton Roy is affiliated with 1 site of care
Dr. Roy's primary practice is Topanga Medical Clinic in Topanga, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Douglas Pendleton Roy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Roy practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Topanga Medical Clinic | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas Pendleton Roy is one of 16,751 internists in California
Internal medicine is Dr. Roy's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Roy is board certified in internal medicine by the American Board of Internal Medicine. Dr. Roy is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute kidney failure, acute mini-stroke (TIA), acute sinusitis, acute skin infection, arthritis, bronchitis, carpal tunnel syndrome and chronic obstructive pulmonary disease (COPD) among the conditions Dr. Roy treats.
Internists near Dr. Roy
Counts of internists 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 Pendleton Roy billed Medicare for 222 services in 2024
CMS data shows 222 Medicare services from Dr. Roy across 3 procedure codes in 2024, all of them office visits, for 63 Medicare patients. Medicare paid $19,962 for them. Every service was in an office.
Dr. Roy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3242024: 22231%
Dr. Roy compared with the California median for internists, 2024
- Dr. Roy
- California median
- Medicare services
- 222vs 36139% below
- Medicare patients
- 63vs 15158% below
- Part D claims
- 133vs 42168% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Roy'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas Pendleton Roy treated 63 Medicare patients in 2024, average age 75
CMS counts 63 Medicare patients who saw Dr. Roy in 2024. The largest group is 75 to 84, with 31 patients. 59% of them have high cholesterol, and 48% have arthritis. Their average risk score is 0.78, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Roy's median patient age at 77, with 40% women.
Dr. Roy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Roy's Medicare patients by sex, 2024
- Women2438%
- Men3962%
Chronic conditions among Dr. Roy's Medicare patients, 2024
- High cholesterol59%
- Arthritis48%
- High blood pressure33%
- Ischemic heart disease22%
- Atrial fibrillation19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Roy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women40%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas Pendleton Roy wrote 293 Medicare Part D claims in 2024
In 2024, Dr. Roy wrote 293 Medicare Part D claims for 51 patients. 93% of them were for generic drugs. CMS names the drug for 133 of them, across 8 drugs with 11 or more claims each, at $1,097 in total drug cost. In 2023, CMS named 160 claims across 10 drugs.
Dr. Roy's Part D claims by kind of drug, 2024
- Generic273 claims93%
- Brand-name and other20 claims7%
Dr. Roy'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. Roy's Part D claims, 2024
- Opioids4%13 of 293 claims
- Antibiotics11%32 of 293 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: 1602024: 13317%
Drugs named by CMS: 8 in 2024, 10 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
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Dr. Douglas Pendleton Roy received $238 in industry payments from 2018 to 2024
CMS Open Payments shows 2 general payments to Dr. Roy from 2 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $123.
General payments to Dr. Roy by program year, 2018 to 2024
Companies that paid Dr. Roy the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas Pendleton Roy graduated from University of Miami, Miller School of Medicine
Dr. Roy graduated from University of Miami, Miller School of Medicine in 1975.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Douglas Pendleton Roy accepts plans from 1 insurance carrier
Dr. Roy is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Douglas Pendleton Roy'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) |
| 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. Douglas Pendleton Roy
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 Pendleton Roy's NPI number?
Dr. Douglas Pendleton Roy's NPI number is 1417025180. It was assigned on December 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas Pendleton Roy?
Dr. Douglas Pendleton Roy is an internist in Topanga, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Douglas Pendleton Roy practice?
Dr. Roy practices at 395 S Topanga Canyon Blvd, Topanga, CA 90290-3143. Dr. Roy's primary practice is Topanga Medical Clinic in Topanga, California.
What is Dr. Douglas Pendleton Roy's office phone number?
The practice phone on file for Dr. Roy is (310) 455-2019.
What is Dr. Douglas Pendleton Roy's medical license number?
Dr. Roy holds California license G-037170.
Does Dr. Douglas Pendleton Roy accept Medicare?
Yes. CMS data shows Dr. Roy billed Medicare for 222 services in 2024.
How many Medicare patients does Dr. Douglas Pendleton Roy see?
CMS counts 63 Medicare patients who saw Dr. Roy in 2024, with an average age of 75.
Is Dr. Douglas Pendleton Roy board certified?
Yes. Dr. Roy is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Douglas Pendleton Roy bill to Medicare?
In 2024, Dr. Roy's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, established patient (99215).
Where did Dr. Douglas Pendleton Roy go to medical school?
Dr. Roy graduated from University of Miami, Miller School of Medicine in 1975.
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What drugs does Dr. Douglas Pendleton Roy prescribe most?
In 2024 Medicare Part D data, Dr. Roy's most prescribed drugs by claims were Alprazolam, Tamsulosin HCl and Atorvastatin Calcium.
Has Dr. Douglas Pendleton Roy received payments from drug or device companies?
CMS Open Payments shows $238 in general payments to Dr. Roy from 2 companies from 2018 to 2024. The largest total came from Novo Nordisk Inc.
How long has Dr. Douglas Pendleton Roy been practicing?
Dr. Roy graduated from medical school in 1975, 51 years ago.
What insurance does Dr. Douglas Pendleton Roy accept?
Dr. Roy is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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