Lanny Hsieh, MD
NPI 1184828444 · Hospitalist Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lanny Hsieh, MD is a Hospitalist Physician provider in Orange, CA (NPI 1184828444).
Provider details
- NPI number
- 1184828444
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A74172 (CA)
Specialties & taxonomies
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
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
420 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 | 184 | $131 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 103 | $87 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 54 | $190 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 42 | $127 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 23 | $143 |
| Telephone Or Internet Referral Service, 30 Minutes99452 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-12
- Last updated
- 2023-11-30
- Certified
- 2023-11-30
Frequently asked questions
- What is Lanny Hsieh's NPI number?
- Lanny Hsieh's National Provider Identifier (NPI) is 1184828444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lanny Hsieh's specialty?
- Lanny Hsieh is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Lanny Hsieh located?
- Lanny Hsieh's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Lanny Hsieh's phone number?
- The practice phone number listed in the NPPES registry for Lanny Hsieh is (714) 456-8068.
- Does Lanny Hsieh accept Medicare?
- Lanny Hsieh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lanny Hsieh's NPI active?
- Yes — Lanny Hsieh's NPI (1184828444) is active in the NPPES registry as of the last update on 2023-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.