Karen Gan, M.D.
NPI 1558303800 · Anesthesiology Physician · Upland, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Gan, M.D. is a Anesthesiology Physician provider in Upland, CA (NPI 1558303800).
Provider details
- NPI number
- 1558303800
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G63793 (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
12 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) |
|---|---|---|
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 12 | $43 |
Typical Medicare-allowed amounts for these services range $43–$43 (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
- 2006-06-12
- Last updated
- 2015-02-19
Frequently asked questions
- What is Karen Gan's NPI number?
- Karen Gan's National Provider Identifier (NPI) is 1558303800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Gan's specialty?
- Karen Gan is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Gan located?
- Karen Gan's practice location on file with NPPES is 999 San Bernardino Rd, Upland, CA 91786-4920.
- What is Karen Gan's phone number?
- The practice phone number listed in the NPPES registry for Karen Gan is (909) 920-4851.
- Does Karen Gan accept Medicare?
- Karen Gan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Gan's NPI active?
- Yes — Karen Gan's NPI (1558303800) is active in the NPPES registry as of the last update on 2015-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.