Mark Del Rosario, MD
NPI 1205273927 · Hospitalist Physician · Littleton, CO
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Del Rosario, MD is a Hospitalist Physician provider in Littleton, CO (NPI 1205273927).
Provider details
- NPI number
- 1205273927
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- R74098 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
532 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 293 | $115 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 75 | $113 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 66 | $77 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 39 | $170 |
| Critical Care, First 30-74 Minutes99291 | 33 | $207 |
| Advance Care Planning, First 30 Minutes99497 | 15 | $74 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefuroxime Axetilbrand: Cefuroxime | 19 | 18 |
| Omeprazole | 16 | — |
| Prednisone | 15 | — |
| Darifenacin Hydrobromidebrand: Darifenacin Er | 11 | — |
| Levothyroxine Sodium | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$27 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1111 E Mcdowell RdPhoenix, AZ 85006-2612Phone: (602) 839-2296Fax: (602) 839-2084
Registry dates
- Enumerated
- 2013-06-04
- Last updated
- 2020-11-30
- Certified
- 2020-11-30
Frequently asked questions
- What is Mark Del Rosario's NPI number?
- Mark Del Rosario's National Provider Identifier (NPI) is 1205273927, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Del Rosario's specialty?
- Mark Del Rosario is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Del Rosario located?
- Mark Del Rosario's practice location on file with NPPES is 7700 S Broadway, Littleton, CO 80122-2602.
- What is Mark Del Rosario's phone number?
- The practice phone number listed in the NPPES registry for Mark Del Rosario is (303) 730-8900.
- Does Mark Del Rosario accept Medicare?
- Mark Del Rosario is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Del Rosario's NPI active?
- Yes — Mark Del Rosario's NPI (1205273927) is active in the NPPES registry as of the last update on 2020-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.