Karen Fann, D.O.
NPI 1265635023 · Otolaryngology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Fann, D.O. is a Otolaryngology Physician provider in Mountain View, CA (NPI 1265635023).
Provider details
- NPI number
- 1265635023
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A9852 (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
19 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
849 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 205 | $71 |
| Removal of Impacted Ear Wax69210 | 184 | $57 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 152 | $112 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 94 | $137 |
| Exam of Ear Using a Microscope92504 | 90 | $39 |
| Exam of the Nose and Throat Using an Endoscope92511 | 30 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 168 | 60 |
| Azelastine Hcl | 151 | 70 |
| Fluticasone Propionate | 144 | 62 |
| Ipratropium Bromide | 65 | 28 |
| Omeprazole | 65 | 28 |
| Fluocinolone Acetonide Oil | 36 | 27 |
| Mometasone Furoate | 35 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 6 records (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
- 2007-06-08
- Last updated
- 2020-11-11
- Certified
- 2020-11-11
Frequently asked questions
- What is Karen Fann's NPI number?
- Karen Fann's National Provider Identifier (NPI) is 1265635023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Fann's specialty?
- Karen Fann is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Fann located?
- Karen Fann's practice location on file with NPPES is 2495 Hospital Dr Ste 450, Mountain View, CA 94040-4171.
- What is Karen Fann's phone number?
- The practice phone number listed in the NPPES registry for Karen Fann is (650) 988-4161.
- Does Karen Fann accept Medicare?
- Karen Fann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Fann's NPI active?
- Yes — Karen Fann's NPI (1265635023) is active in the NPPES registry as of the last update on 2020-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.