Joanna Tan, MD
NPI 1861493553 · Family Medicine Physician · Yorba Linda, CA
Joanna Tan, MD is a Family Medicine Physician provider in Yorba Linda, CA (NPI 1861493553).
Provider details
- NPI number
- 1861493553
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A36922 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
53 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Needle Into Vein for Collection of Blood Sample36415 | 30 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 23 | $138 |
Typical Medicare-allowed amounts for these services range $9–$138 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 364 | 134 |
| Rosuvastatin Calcium | 250 | 92 |
| Amlodipine Besylate | 184 | 67 |
| Levothyroxine Sodium | 182 | 68 |
| Alendronate Sodium | 153 | 64 |
| Metoprolol Succinate | 152 | 54 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-03
- Last updated
- 2013-04-25
Frequently asked questions
- What is Joanna Tan's NPI number?
- Joanna Tan's National Provider Identifier (NPI) is 1861493553, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Tan's specialty?
- Joanna Tan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Tan located?
- Joanna Tan's practice location on file with NPPES is 4300 Rose Dr, Yorba Linda, CA 92886-2026.
- What is Joanna Tan's phone number?
- The practice phone number listed in the NPPES registry for Joanna Tan is (714) 528-4211.
- Is Joanna Tan's NPI active?
- Yes — Joanna Tan's NPI (1861493553) is active in the NPPES registry as of the last update on 2013-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.