James Singleton, MD
NPI 1104881226 · Rheumatology Physician · Highlands Ranch, CO
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Singleton, MD is a Rheumatology Physician provider in Highlands Ranch, CO (NPI 1104881226).
Provider details
- NPI number
- 1104881226
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 28405 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,396 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 289 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 223 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 197 | $129 |
| X-Ray of Foot, 2 Views73620 | 135 | $29 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 134 | $28 |
| X-Ray of Hand, 2 Views73120 | 133 | $32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 325 | 65 |
| Prednisone | 106 | 45 |
| Allopurinol | 87 | 24 |
| Hydroxychloroquine Sulfate | 55 | 16 |
| Folic Acid | 40 | 15 |
| Leucovorin Calcium | 36 | 16 |
| Leflunomide | 35 | — |
| Sulfasalazine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-20
- Last updated
- 2011-04-21
Frequently asked questions
- What is James Singleton's NPI number?
- James Singleton's National Provider Identifier (NPI) is 1104881226, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Singleton's specialty?
- James Singleton is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is James Singleton located?
- James Singleton's practice location on file with NPPES is 206 W County Line Road, Highlands Ranch, CO 80129-2359.
- What is James Singleton's phone number?
- The practice phone number listed in the NPPES registry for James Singleton is (303) 788-8355.
- Does James Singleton accept Medicare?
- James Singleton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Singleton's NPI active?
- Yes — James Singleton's NPI (1104881226) is active in the NPPES registry as of the last update on 2011-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.