Karren Tan, NP
NPI 1578226064 · Family Nurse Practitioner · Anaheim, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karren Tan, NP is a Family Nurse Practitioner provider in Anaheim, CA (NPI 1578226064).
Provider details
- NPI number
- 1578226064
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95018902 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
338 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 164 | $84 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 118 | $117 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 27 | $119 |
| Removal of Impacted Ear Wax By Washing69209 | 16 | $19 |
| Assessment of Emotional Or Behavioral Problems96127 | 13 | $5 |
Typical Medicare-allowed amounts for these services range $5–$119 (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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 79 | 28 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 61 | 28 |
| Atorvastatin Calcium | 58 | 23 |
| Azithromycin | 50 | 45 |
| Gabapentin | 49 | 19 |
| Amlodipine Besylate | 42 | 15 |
| Alprazolam |
Practice location
Mailing address
Additional practice locations (2)
- 631 S Brookhurst St Ste 101Anaheim, CA 92804-3563Phone: (714) 991-5700
- 14330 Culver DrIrvine, CA 92604-0303Phone: (949) 559-8129
Registry dates
- Enumerated
- 2021-10-21
- Last updated
- 2026-01-12
- Certified
- 2026-01-12
Frequently asked questions
- What is Karren Tan's NPI number?
- Karren Tan's National Provider Identifier (NPI) is 1578226064, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karren Tan's specialty?
- Karren Tan is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karren Tan located?
- Karren Tan's practice location on file with NPPES is 761 S Weir Canyon Rd Ste 185, Anaheim, CA 92808-1947.
- What is Karren Tan's phone number?
- The practice phone number listed in the NPPES registry for Karren Tan is (714) 282-6934.
- Does Karren Tan accept Medicare?
- Karren Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karren Tan's NPI active?
- Yes — Karren Tan's NPI (1578226064) is active in the NPPES registry as of the last update on 2026-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.