Dr. James D. Singleton, MD
- Medicare services, 2024
- 17,327
- Medicare patients, 2024
- 144
- Part D claims, 2024
- 980
- Industry payments
- $1,904
- Affiliated sites
- 2
- Practice address
- 4 W Dry Creek Cir, Littleton, CO 80120
- Practice phone
- Call (303) 788-8355
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Osteoporosis Center of Highlands Ranch
Littleton, Colorado
Find Dr. Singleton'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. James D. Singleton is a rheumatologist in Littleton, Colorado
Dr. Singleton practices at Osteoporosis Center of Highlands Ranch in Littleton, Colorado.
Dr. Singleton's NPI, 1104881226, was assigned on April 20, 2006. Dr. Singleton graduated from University of Kansas School of Med (KC/Wich/Sal) in 1983. Dr. Singleton holds Colorado license 28405.
- NPI
- 1104881226NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072500388
- NPI enumeration date
- April 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (303) 788-8355
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James D. Singleton practices at Osteoporosis Center of Highlands Ranch in Littleton, Colorado
Dr. Singleton's primary practice is Osteoporosis Center of Highlands Ranch, at 4 W Dry Creek Cir, Littleton, CO 80120 in Arapahoe County. The practice phone is (303) 788-8355.
- Osteoporosis Center of Highlands Ranch4 W Dry Creek Cir, Littleton, CO 80120 · Arapahoe CountyPhone(303) 788-8355
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James D. Singleton is affiliated with 3 sites of care and 1 medical group
Dr. Singleton's primary practice is Osteoporosis Center of Highlands Ranch in Littleton, Colorado. The medical group on file is Colorado Arthritis Center. Dmand AI also links Dr. Singleton to 1 more physician office and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James D. Singleton's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Singleton practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Osteoporosis Center of Highlands Ranch | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James D. Singleton is one of 130 rheumatologists in Colorado
Rheumatology is Dr. Singleton's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Singleton is licensed in Colorado.
Specialties and state licenses
- Rheumatology, ColoradoPrimary
Rheumatologists near Dr. Singleton
Counts of rheumatologists 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. James D. Singleton billed Medicare for 17,327 services in 2024
CMS data shows 17,327 Medicare services from Dr. Singleton across 14 procedure codes in 2024, for 144 Medicare patients. Medicare paid $281,341 for them. Every service was in an office.
Dr. Singleton's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 15,3712024: 12,33120%
- Other services
- 2023: 132024: 3,60027592%
- Tests and treatments
- 2023: 5172024: 4974%
- Office and hospital visits
- 2023: 3932024: 45315%
- Imaging
- 2023: 3752024: 44619%
- Lab and pathology
- 2023: 372024: 0100%
Dr. Singleton compared with the Colorado median for rheumatologists, 2024
- Dr. Singleton
- Colorado median
- Medicare services
- 17,327vs 3,0925.6 times
- Medicare patients
- 144vs 28650% below
- Part D claims
- 884vs 1,00412% below
Medians across 122 rheumatologists in Colorado with Dmand AI profiles that report each measure.
Dr. Singleton'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Singleton and other rheumatologists in Colorado.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James D. Singleton treated 144 Medicare patients in 2024, average age 77
CMS counts 144 Medicare patients who saw Dr. Singleton in 2024. The largest group is 75 to 84, with 68 patients. 75% of them have arthritis, and 70% have high blood pressure. Their average risk score is 1.50, 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. Singleton's median patient age at 70, with 61% women.
Dr. Singleton's Medicare patients by age, 2024
Dr. Singleton's Medicare patients by sex, 2024
- Women8660%
- Men5840%
Chronic conditions among Dr. Singleton's Medicare patients, 2024
- Arthritis75%
- High blood pressure70%
- High cholesterol69%
- Osteoporosis40%
- Chronic kidney disease25%
- Ischemic heart disease25%
- Mood disorders25%
- Atrial fibrillation24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Singleton's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James D. Singleton wrote 980 Medicare Part D claims in 2024
In 2024, Dr. Singleton wrote 980 Medicare Part D claims for 151 patients. 93% of them were for generic drugs. CMS names the drug for 884 of them, across 16 drugs with 11 or more claims each, at $23,576 in total drug cost. In 2023, CMS named 907 claims across 20 drugs.
Dr. Singleton's Part D claims by kind of drug, 2024
- Generic909 claims93%
- Brand-name71 claims7%
Dr. Singleton'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9072024: 8843%
Drugs named by CMS: 16 in 2024, 20 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. James D. Singleton takes part in Medicare
Dr. Singleton 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. James D. Singleton received $1,904 in industry payments from 2016 to 2025
CMS Open Payments shows 74 general payments to Dr. Singleton from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 76% of the total. Genentech, Inc. paid the most, $1,071.
General payments to Dr. Singleton by program year, 2016 to 2025
General payments to Dr. Singleton by kind, 2016 to 2025
- Food and beverage$1,44176%
- Consulting fees$20011%
- Gifts$1498%
- Education$1146%
Companies that paid Dr. Singleton 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. James D. Singleton graduated from University of Kansas School of Med (KC/Wich/Sal)
Dr. Singleton graduated from University of Kansas School of Med (KC/Wich/Sal) in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James D. Singleton'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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. James D. Singleton
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. James D. Singleton's NPI number?
Dr. James D. Singleton's NPI number is 1104881226. It was assigned on April 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James D. Singleton?
Dr. James D. Singleton is a rheumatologist in Littleton, Colorado. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. James D. Singleton practice?
Dr. Singleton practices at 4 W Dry Creek Cir, Littleton, CO 80120. Dr. Singleton's primary practice is Osteoporosis Center of Highlands Ranch in Littleton, Colorado. Dmand AI also links Dr. Singleton to 1 physician office and 1 group practice or clinic.
What is Dr. James D. Singleton's office phone number?
The practice phone on file for Dr. Singleton is (303) 788-8355.
What is Dr. James D. Singleton's medical license number?
Dr. Singleton holds Colorado license 28405.
What medical group is Dr. James D. Singleton part of?
Dr. Singleton is linked to Colorado Arthritis Center.
Does Dr. James D. Singleton accept Medicare?
Yes. CMS data shows Dr. Singleton billed Medicare for 17,327 services in 2024, and Dr. Singleton accepts Medicare assignment.
How many Medicare patients does Dr. James D. Singleton see?
CMS counts 144 Medicare patients who saw Dr. Singleton in 2024, with an average age of 77.
What services does Dr. James D. Singleton bill to Medicare?
In 2024, Dr. Singleton's most billed Medicare services were injected or infused drug (J1602), medicare temporary code (Q5104) and infusion or chemotherapy administration (96413).
Where did Dr. James D. Singleton go to medical school?
Dr. Singleton graduated from University of Kansas School of Med (KC/Wich/Sal) in 1983.
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What drugs does Dr. James D. Singleton prescribe most?
In 2024 Medicare Part D data, Dr. Singleton's most prescribed drugs by claims were Methotrexate, Prednisone and Allopurinol.
Has Dr. James D. Singleton received payments from drug or device companies?
CMS Open Payments shows $1,904 in general payments to Dr. Singleton from 11 companies from 2016 to 2025. The largest total came from Genentech, Inc.
How long has Dr. James D. Singleton been practicing?
Dr. Singleton graduated from medical school in 1983, 43 years ago.
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