Michael Sim, M.D.
NPI 1811972771 · Nephrology Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Sim, M.D. is a Nephrology Physician provider in Sacramento, CA (NPI 1811972771).
Provider details
- NPI number
- 1811972771
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A86300 (CA)
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
836 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 354 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 341 | $98 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 67 | $145 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 38 | $135 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 21 | $67 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 141 | 35 |
| Amlodipine Besylate | 92 | 30 |
| Empagliflozinbrand: Jardiance | 77 | 16 |
| Furosemide | 67 | 17 |
| Tamsulosin Hcl | 45 | 16 |
| Losartan Potassium | 42 | 16 |
| Patiromer Calcium Sorbitexbrand: Veltassa | 31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Sim's NPI number?
- Michael Sim's National Provider Identifier (NPI) is 1811972771, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Sim's specialty?
- Michael Sim is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Sim located?
- Michael Sim's practice location on file with NPPES is 6600 Bruceville Rd, Sacramento, CA 95823-4671.
- What is Michael Sim's phone number?
- The practice phone number listed in the NPPES registry for Michael Sim is (916) 688-6988.
- Does Michael Sim accept Medicare?
- Michael Sim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Sim's NPI active?
- Yes — Michael Sim's NPI (1811972771) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.