Yunzhu Mei, M.D.
NPI 1821114182 · Critical Care Medicine (Internal Medicine) Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yunzhu Mei, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in San Francisco, CA (NPI 1821114182).
Provider details
- NPI number
- 1821114182
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
19 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
121 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 78 | $231 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 43 | $132 |
Typical Medicare-allowed amounts for these services range $132–$231 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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
Registry dates
- Enumerated
- 2007-03-21
- Last updated
- 2015-07-17
Frequently asked questions
- What is Yunzhu Mei's NPI number?
- Yunzhu Mei's National Provider Identifier (NPI) is 1821114182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yunzhu Mei's specialty?
- Yunzhu Mei is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Yunzhu Mei located?
- Yunzhu Mei's practice location on file with NPPES is 900 Hyde St, San Francisco, CA 94109-4806.
- What is Yunzhu Mei's phone number?
- The practice phone number listed in the NPPES registry for Yunzhu Mei is (415) 353-6000.
- Does Yunzhu Mei accept Medicare?
- Yunzhu Mei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yunzhu Mei's NPI active?
- Yes — Yunzhu Mei's NPI (1821114182) is active in the NPPES registry as of the last update on 2015-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.