Mark Sims, MD
NPI 1376806745 · Hospitalist Physician · Salt Lake City, UT
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Sims, MD is a Hospitalist Physician provider in Salt Lake City, UT (NPI 1376806745).
Provider details
- NPI number
- 1376806745
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A129202 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
217 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 73 | $111 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 64 | $74 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 39 | $107 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 30 | $162 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $122 |
Typical Medicare-allowed amounts for these services range $74–$162 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 1250 16th St # C2304Santa Monica, CA 90404-1249Phone: (310) 319-4698Fax: (310) 319-4908
- 1245 16th St Ste 125Santa Monica, CA 90404-1240Phone: (310) 315-8900Fax: (310) 315-8902
Registry dates
- Enumerated
- 2012-06-20
- Last updated
- 2026-03-27
- Certified
- 2026-03-27
Frequently asked questions
- What is Mark Sims's NPI number?
- Mark Sims's National Provider Identifier (NPI) is 1376806745, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Sims's specialty?
- Mark Sims is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Sims located?
- Mark Sims's practice location on file with NPPES is 30 N 1900 E Rm 4c104, Salt Lake City, UT 84132-0002.
- What is Mark Sims's phone number?
- The practice phone number listed in the NPPES registry for Mark Sims is (801) 585-1686.
- Does Mark Sims accept Medicare?
- Mark Sims is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Sims's NPI active?
- Yes — Mark Sims's NPI (1376806745) is active in the NPPES registry as of the last update on 2026-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.